Recent studies indicate a close association between the distribution of prime numbers and quantum mechanical laws governing the subatomic dynamics of quantum systems such as the electron or the photon. Number theoretical concepts are intrinsically related to the quantitative description of dynamical systems of all scales ranging from the microscopic subatomic dynamics to macroscale turbulent fluid flows such as the atmospheric flows. It is now recognised that Cantorian fractal spacetime characterise all dynamical systems in nature. A cell dynamical system model developed by the author shows that the continuum dynamics of turbulent fluid flows consist of a broadband continuum spectrum of eddies which follow quantumlike mechanical laws. The model concepts enable to show that the continuum real number field contains unique structures, namely prime numbers which are analogous to the dominant eddies in the eddy continuum in turbulent fluid flows. In this paper it is shown that the prime number frequency spectrum follows quantumlike mechanical laws.

    The continuum real number field(infinite number of decimals between any two integers) represented as Cartesian co-ordinates [ Mathews, 1961; Stewart and Tall,1990;  Devlin,1997; Stewart,1998] is the basic computational tool in the simulation and prediction of the continuum dynamics of real world dynamical systems such as fluid flows,stock market price fluctuations, heart beat patterns, etc. Till the late 1970s mathematical models were based on Newtonian continuum dynamics with implicit assumption of linearity in the rate of change with respect to (w.r.t) time or space of the dynamical variable under consideration. The traditional mathematical model equations were of the form
 
 

Constant value was assumed for the rate of change  of the variable X_n  at computational step n and infinitesimally small time or space intervals dt . Equation(1) will be linear and can be solved analytically provided the rate of change  is constant. However, dynamical systems in nature exhibit irregular fluctuations and therefore the assumption of constant rate of change fails and Equation(1) does not have analytical solution. Numerical solutions are then obtained for discrete(finite) space-time intervals such that the continuum dynamics of Equation(1) is now computed as discrete dynamics given by
 
 

    Numerical solutions obtained using Equation(2), which is basically a numerical integration procedure, involve iterative computations with feedback and amplification of round-off error of real number finite precision arithmetic. The Equation(2) also represents the relationship between continuum number field and embedded discrete(finite) number fields. Numerical solutions for nonlinear dynamical systems represented by Equation 2 are sensitively dependent on initial conditions and give apparently chaotic solutions, identified as deterministic chaos . Deterministic chaos therefore characterise the evolution of discrete(finite) structures from the underlying continuum number field. Historically , sensitive depence on initial conditions of nonlinear dynamical systems was identified nearly a century ago by Poincare (Poincare, 1892) in his study of three body problem,namely the sun, earth and the moon . Nonlinear dynamics remained a neglected area of research till the advent of electronic computers in the late 1950s. Lorenz, in 1963 showed that numerical solutions of a simple model of atmospheric flows exhibited sensitive dependence on initial conditions implying loss of predictability of the future state of the system. The traditional nonlinear dynamical system defined by Equation 2 is commonly used in all branches of science and other areas of human interest. Nonlinear dynamics and chaos soon(by 1980s) became a multidisciplinary intensive field of research (Gleick, 1987). Sensitive dependence on initial conditions imply long-range spatiotemporal correlations. The irregular fluctuations of real world dynamical syatems also exhibit such non-local connections manifested as fractal or selfsimilar geometry to the spatiotemporal evolution. The universal symmetry of selfsimilarity ubiquitous to dynamical systems in nature is now identified as self-organized criticality (Bak,Tang and Wiesenfeld, 1988). A symmetry of some figure or pattern is a transformation that leaves the figure invariant, in the sense that, taken as a whole it looks the same after the transformation as it did before, although individual points of the figure may be moved by the transformation(Devlin,1997 ). Selfsimilar structures have internal structure which resemble the whole.
    The spatiotemporal organization of a hierarchy of selfsimilar space-time structures is common to real world as well as the numerical models(Equation 2) used for simulation . A substratum of continuum fluctuations self-organizes to generate the observed  unique hierarchical structures both in real world and the continuum number field used as the tool for simulation.  A cell dynamical system model developed by the author [Mary Selvam, 1990; Selvam and Suvarna Fadnavis,1998,1999a,b] for turbulent fluid flows shows that selfsimilar (fractal) spacetime fluctuations exhibited by real world and numerical models of dynamical systems are signatures of quantumlike mechanics. The model concepts are applicable to the emergence of  unique prime number spectrum from the underlying substratum of continuum real number field.

    Recent studies indicate a close association between number theory in mathematics, in particular, the distribution of prime numbers and the chaotic orbits of excited quantum systems such as the hydrogen atom [Cipra, 1996]. Mathematical studies indicate that cantorian fractal space-time characterises quantum systems[Nottale, 1989; Ord, 1983; El Naschie, 1993].

    A summary of the important results of the cell dynamical system model results for turbulent fluid flows [Mary Selvam, 1990; Selvam and Suvarna Fadnavis, 1998,1999a,b] which are applicable to the present study are given in the following.
     Based on Townsend’s [Townsend, 1956] concept that large eddies are envelopes of enclosed turbulent eddy circulations (Figure 3), the relationship between root mean square (r.m.s.) circulation speeds W and w_* respectively of large and turbulent eddies of respective radii R and r is given as

    The dynamical evolution of space-time fractal structures can be quantified in terms of ordered energy flow between fluctuations of all scales described by mathematical functions which occur in the field of number theory. The quantum-like chaos in atmospheric flows can be quantified in terms of the following mathematical functions / concepts: (a) The fractal structure of the continuum flow pattern is resolved into an overall logarithmic spiral trajectory with the quasiperiodic Penrose tiling pattern for the internal structure and is equivalent to a hierarchy of vortices(Figure 1).

    Historically, the British mathematician Roger Penrose discovered in 1974 the quasiperiodic Penrose tiling pattern, purely as a mathematical concept. The fundamental investigation of tilings which fill space completely is analogous to investigating the manner in which matter splits up into atoms and natural numbers split up into product of primes. The distiction between periodic and aperiodic tilings is somewhat analogous to the distinction between rational and irrational real numbers, where the latter have decimal expansions that continue forever , without settling into repeating blocks [Devlin, 1997]. Even earlier Kepler saw a fundamental mathematical connection between symmetric patterns and 'space filling geometric figures' such as his own discovery , the rhombic dodecahedron , a figure having 12 identical faces [ Devlin, 1997]. The quasiperiodic Penrose tiling pattern has five-fold symmetry of the dodecahedron. Recent studies[Seife,1998] show that in a strong magnetic field, electrons swirl around magnetic field lines, creating a vortex. Under right conditions, a vortex can couple to an electron, acting as a single unit.
 

2.1     Model Predictions

(a) Atmospheric flows trace an overall logarithmic spiral trajectory R_oR₁R₂R₃R₄R₅ with the quasiperiodic Penrose tiling pattern for the internal structure (Figure 1).

(b) Conventional continuous periodogram power spectral analyses of such spiral trajectories will reveal a continuum of periodicities with progressive  increase dq   in phase angle q   (theta) as shown in Figure 2.

(c) The broadband power spectrum will have embedded dominant wave-bands(R_oOR₁,R₁OR₂,R₂OR₃,R₃OR₄,R₄OR₅,etc.) the bandwidth increasing with period length(Figure 1). The peak periods E_n in the dominant wavebands will be given by the relation

where t   is the golden mean equal to {1+sqrt(5)}/2 [approximately equal to 1.618 ] and T_s , the primary perturbation time period ; for example , T_s  is the annual cycle (summer to winter) of solar heating in a study of atmospheric interannual variability. The peak periods E_n  are superimposed on a continuum background . For example, the most striking feature in climate variability on all time scales is the presence of sharp peaks superimposed on a continuous background [Ghil,1994].

(d) The ratio  r/R  also represents the increment  dq  in phase angle q   (Equation 3 and Figure 2) and therefore the phase angle q   represents the variance [ Mary Selvam, 1990 ] . Hence, when the logarithmic spiral is resolved as an eddy continuum in conventional spectral analysis, the increment in wavelength is concomitant with increase in phase. The angular turning, in turn, is directly proportional to the variance( Equation 3) Such a result that increments in wavelength and phase angle are related is observed in quantum systems and has been named 'Berry's phase' [Berry ,1988]. The relationship of angular turning of the spiral to intensity of fluctuations is seen in the tight coiling of the hurricane spiral cloud systems.

(e) The overall logarithmic spiral flow structure is given by the relation

where the constant k is the steady state fractional volume dilution of large eddy by inherent turbulent eddy fluctuations .  The constant  k  is equal to 1/t  ² (=0.382) and is identified as the universal constant for deterministic chaos in fluid flows. Since k is less than half, the mixing with environmental air does not erase the signature of the dominant large eddy , but helps to retains its identity as a stable self-sustaining soliton-like structure The mixing of environmental air assists in the upward and outward growth of the large eddy. The steady state emergence of fractal structures is therefore equal to

    Logarithmic wind profile relationship such as Equation 5 is a long-established(observational) feature of atmospheric flows in the boundary layer, the constant k, called the Von Karman ’s constant has the value equal to 0.38 as determined from observations [ Wallace and Hobbs , 1977] .
     In Equation 5, W  represents the standard deviation of eddy fluctuations, since W  is computed as the instantaneous r.m.s.(root mean square) eddy perturbation amplitude with reference to the earlier step of eddy growth. For two successive stages of eddy growth starting from primary perturbation w_* , the ratio of the standard deviations W_n+1  and W_n is given from Equation 5 as (n+1)/n. Denoting by s  the standard deviation of eddy fluctuations at the reference level (n=1) the standard deviations of eddy fluctuations for successive stages of eddy growth are given as integer multiple of s  ,  i.e.,  s  , 2s  , 3s  , etc., and correspond respectively to
 
 

    The conventional power spectrum plotted as the variance versus the frequency in log-log scale will now represent the eddy probability density on logarithmic scale versus the standard deviation of the eddy fluctuations on linear scale since the logarithm of the eddy wavelength represents the standard deviation , i.e. the r.m.s. value of eddy fluctuations (Equation 5). The r.m.s. value of eddy fluctuations can be represented in terms of statistical normal distribution as follows. A normalized standard deviation t = 0 corresponds to cumulative percentage probability density equal to 50 for the mean value of the distribution. Since the logarithm of the wavelength represents the r.m.s. value of eddy fluctuations the normalized standard deviation t   is defined for the eddy energy as

where  L  is the period in years and  T₅₀  is the period up to which the cumulative percentage contribution to total variance is equal to 50 and  t = 0 .
The variable log T₅₀  also represents the mean value for the r.m.s. eddy fluctuations and is consistent with the concept of the mean level represented by r.m.s. eddy fluctuations. Spectra of time series of any dynamical system, for example, meteorological parameters when plotted as cumulative percentage contribution to total variance versus t  should follow the model predicted universal spectrum. The literature shows many examples of pressure,wind and temperature whose shapes display a remarkable degree of universality [Canavero and Einaudi,1987].
     The theoretical basis for formulation of the universal spectrum is based on the Cental Limit Theorem in Statistics, namely, if an overall random variable is the sum of very many elementary random variables, each having its own arbitrary distribution law, but all of them being small, then the distribution of the overall random variable is Gaussian [Ruhla and Barton,1992] . Therefore, when the spectra of space-time fluctuations of dynamical systems are plotted in the above fashion, they tend to closely (not exactly) follow cumulative normal distribution.

    The period T₅₀  up to which the cumulative percentage contribution to total variance is  equal to 50 is computed from model concepts as follows.
     The power spectrum, when plotted as  normalized standard deviation t versus cumulative percentage contribution to total variance represents the statistical normal distribution(Equation 8), i.e. the variance represents the probability density. The normalized standard deviation value 0 corresponds to cumulative percentage probability density P  equal to 50   from statistical normal distribution characteristics. Since t  represents the eddy growth step n  (Equation 7), the dominant period T₅₀   upto which the cumulative percentage contribution to total variance is equal to 50  is obtained from Equation 4 for  value of n  equal to 0  . In the present study of periodicities in prime number spacing intervals, the primary perturbation time period T_s  is equal to the unit number class interval and T₅₀  and is obtained as

    Prime numbers  with spacing intervals up to 3.6 or approximately 4  contribute upto  50% to the total variance. This model prediction is in agreement with computed value of T₅₀(Section 3.3 ).
 

2.2    Applications of model concepts to prime number distribution

    The incorporation of Fibonacci mathematical series, representative of ramified bifurcations, indicates ordered growth of fractal patterns. The fractal patterns are shown to result from the cumulative integration of enclosed small scale fluctuations. By analogy it follows that the continuum number field when computed as the integrated mean over successively larger discrete domains, also follows the quasiperiodic Penrose tiling pattern. It is shown in the following that the steady state emergence of progressively larger fractal structures incorporates unique primary perturbation domains of progressively increasing total number equal to z/lnz where z, the length step growth stage is equal to the length scale ratio of large eddy to turbulent eddy. In number theory ,  prime numbers are unique numbers and the prime number theorem(PNT)  states that z/lnz gives approximately the number of primes less than or equal to z [Rose, 1995] . The model also predicts that z/lnz represents the normalized cumulative variance spectrum of the eddies and this spectrum follows statistical normal distribution. The important result of the study is that the prime number spectrum is the same as the eddy energy spectrum for quantum-like chaos in atmospheric flows and the spectra follow the universal inverse power law form of the statistical normal distribution.
    Historically, the PNT was postulated just before 1800 by both Legendre (1798)and Gauss (1791in a personal communication) on numerical evidence and it was finally established by Hadamard and (independently) de la Vallee Poussin in 1896. The PNT states that if p(z) is the number of primes p which satisfy 2<= p <= z then p(z) is approximately equal to z/ln z where ln represents the natural logarithm (Rose, 1995; Allenby and Redfern,1989   )

    The cell dynamical model concepts and its application to the evolution of prime number spectrum is explained in the following.

    Large eddies are envelopes of enclosed turbulent eddy circulations, the relationship between root mean square (r.m.s.) circulation speeds W and w_* respectively of large and turbulent eddies of respective radii R and r is given as (Equation 3)
 
 

     In number field domain, the above equation can be visualized as follows. The r.m.s. circulation speeds W and w_* are equivalent to units of computations of respective yardstick lengths R and r. Spatial integration of w_* units of a finite yardstick length r, i.e. a computational domain w_* r, results in a larger computational domain WR [Mary Selvam, 1993]. The computed domain WR is larger than the primary domain w_* r because of uncertainty in the length measurement using a finite yardstick length r, which should be infinitesimally small in an ideal measurement. The continuum number field domain(Catesian co-ordinates ) may therefore be obtained from successive integration of enclosed finite number field domains as shown in Figure 3. Cartesian co-ordinates represent the complex number field. Historically, Gauss(1799) clearly regarded a complex number as a pair of real numbers. The idea was originally stated in a little known work of a Danish surveyor Wessel(1797) and later by Gauss. In 1806, the French mathematician Argand described a complex number x+iy as a point in the plane and this description was given the name 'Argand Diagram' [ Stewart and Tall, 1990].

    The above visualization will help apply concepts developed for continuum atmospheric flow dynamics to evolution of structures in real number field continuum such as the distribution of prime numbers, as explained in the following.

    Fractal structures emerge in atmospheric flows because of mixing of environmental air into the large eddy volume by inherent turbulent eddy fluctuations. The steady state emergence of fractal structures A is equal to [Selvam and Suvarna Fadnavis, 1999a,b]

    The spatial integration of enclosed turbulent eddy circulations as given in Equation(3) represents an overall logarithmic spiral flow trajectory with the quasiperiodic Penrose tiling pattern(Figure 1) for the internal structure [Selvam and Suvarna Fadnavis, 1999a,b] and is equivalent to a hierarchy of vortices ( Section 2 above). The incorporation of Fibonacci mathematical series, representative of ramified bifurcations indicates ordered growth of fractal patterns and signifies non-local connections characteristic of quantum-like chaos. By analogy, the means of ensembles of successively larger number field domains follow a logarithmic spiral trajectory with the quasiperiodic Penrose tiling pattern(Figure 1) for the internal structure.

The logarithmic flow structure is given by the relation (Equation 5).

where z is equal to the eddy length scale ratio R/r and k is equal to the steady state fractional volume dilution of large eddy by turbulent eddy fluctuations and is given as
 
 

The steady state emergence of fractal structure A is
 
 

The outward and upward growing large eddy carries only a fraction f of the primary perturbation equal to

because the fractional outward mass flux of primary perturbation equal to W/w_* occurs in the fractional turbulent eddy cross section r/R.

Therefore

    In atmospheric flows a fraction equal to f of surface air is transported upward to level z and represents the upward transport of moisture which condenses as liquid water content in clouds, and also aerosols of surface origin. The observed vertical profile of liquid water content inside clouds is found to follow the f distribution [Mary Selvam, 1990]. The vertical profile of aerosol concentration in the atmosphere also follows the f distribution [Sikka et al , 1988]. The fraction f carries the unique signature of surface air (primary perturbation) at the level z.

    The f distribution represents, at level z , the signature of unique primary perturbation originating from the underlying substratum.  The f distribution therefore corresponds to the cumulative prime number density distribution corresponding to number z .

Therefore the ratio P equal to A/f gives the number of units of the unique domain of surface air at level z.

    In number theory, the Prime Number Theorem states that z/ln z where ln is the natural logarithm , represents approximately the number of primes less than or equal to z. Prime numbers are unique numbers, i.e. which cannot be factorized [Stewart, 1996]. Therefore P represents the cumulative unique domain lengths of the primary perturbation carried up to the level z .
    In the next Section(3.0) the following  model predictions(Section 2.0) are verified.
(a)    The f distribution represents the actual and computed prime number density distributions.
(b)    The power spectra(variance and phase) of prime number distribution follows the universal and unique inverse power law form of the statistical normal distribution. Inverse power law form for power spectra signify selfsimilarity or long-range correlations inherent to the eddy continuum.
(c)    The broadband eddy continuum exhibits dominant periodicities in close agreement with model predicted peridicities (Equation 4).
(d)    The variance and phase spectra follow each other closely, particularly for the dominant eddies, thereby exhibiting 'Berry's phase' characterising quantum systems.
 
 

     The actual prime number tables (the first 1000 primes) were obtained from the web site: http://www.utm.edu/research/primes.  The first 1000 prime numbers were used for the study. The prime numbers were also computed using the Prime Number Theorem proposed in 1799  by Gauss , namely, the total number of primes p(z) equal to or less than the number z is aproximately equal to z/ln z . The computed prime number density distribution is equal to 1/ln z .

    The computed f distribution(Equation 12), the  actual prime number density distribution and the computed prime number density distributions are shown in Figure 4.

    The shape of the actual prime number density distribution is close to and resembles f distribution. Further , the maximum value ( approximately equal to 0.6) for these two distributions occurs for z value equal to 2p  . The eddy length scale ratio z represents the phase (Section 2 ) and therefore the maximum values for f and also (by analogy), for the prime number distributions occur for one complete cycle of eddy circulation . Such a closed self-sustaining circulation is similar to a soliton  , a stable selfsustaining eddy structure.
 
 

    The values of actual prime number distribution, the corresponding values computed using the relation z/lnz (Prime Number Theorem) which give the number of primes less than or equal to z  and the f distribution  follow statistical normal distribution as described in the following. The frequency distributions were computed in terms of the normalised standard deviation as explained in the following for prime number(calculated) distribution . The number of primes P equal to or less than z are calculated for a range of n values from x₁ = z₁ to x_n = z_n . The cumulative percentage number of primes P_c is calculated as equal to (P_m / P_n)*100 where m = 1,2,...n for each class interval X = ( x_m+x_m+1 ) / 2. The number of primes P_t = P_m+1 - P_m in each class interval X is also calculated. The normalized standard deviate t is then equal to (Xbar - X) / s   where Xbar is the mean of the prime number distribution. The corresponding standard deviation of the X versus P_t  distribution is then calculated as equal to s .

     The prime number(actual and computed) frequency distribution  and also the corresponding f distribution for values of z from 3 to 1000 at unit intervals are shown in Figure 5. The statistical normal distribution is also plotted in the Figure 5. It is seen that the prime number(actual and computed) distributions and the corresponding f distribution closely follow statistical normal distribution.

    In the quantum-like chaos in atmospheric flows the function z/lnz represents the variance spectrum of the fractal structures as shown below.

    The length scale ratio z equal to R/r represents the relative variance (Equation 3). The relative upward mass flux of primary perturbation equal to W/w_* is proportional to lnz (Equation 5). Therefore z/lnz represents the cumulative variance normalized to upward flow of primary perturbation. The cumulative variance or energy spectrum of the eddies is therefore represented by z/lnz distribution.

    By concept (Equation 3) large eddies are but the integrated mean of inherent turbulent eddies and therefore the eddy energy spectrum follows statistical normal distribution according to the Central Limit Theorem (Section 2). The prime number spectrum which is equivalent to the variance (energy) spectrum of eddies follows statistical normal distribution as seen in Figure 5 shown above. Earlier studies using various meteorological data sets have shown that atmospheric eddy energy spectrum follow statistical normal distribution [Selvam and Suvarna Fadnavis, 1998].
 
 

    The broadband power spectrum of space-time fluctuations of dynamical systems  can be computed accurately by an elementary, but very powerful method  of  analysis  developed by Jenkinson (1977) which provides a quasi-continuous form of the classical periodogram allowing systematic allocation of the total variance and degrees of freedom of the data series to logarithmically spaced elements of the frequency range (0.5, 0). The periodogram is constructed for a fixed set of 10000(m) periodicities L_m  which increase  geometrically as L_m=2 exp(Cm) where C=.001 and m=0, 1, 2,....m . The data series Y_t for the N  data points was used. The periodogram estimates the set of A_mcos(2pn_mS-f_m) where   A_m, n_m and  f_m denote respectively the amplitude, frequency and phase angle for the m^th periodicity and S is the time or space interval . In the present study the frequency of occurrence of primes in unit number class intervals ranging from 3 to 1000 was used. The cumulative percentage contribution to total variance was computed starting from the high frequency side of the spectrum. The period T₅₀ at which 50% contribution to total variance occurs is taken as reference and the normalized standard deviation t_m values are computed as (Equation 8).

    The cumulative percentage contribution to total variance, the cumulative percentage normalized phase (normalized with respect to the total phase rotation) and the corresponding t  values were computed . The power spectra were plotted as cumulative percentage contribution to total variance versus the normalized standard deviation t   as given above . The period L  is in units of number class interval which is equal to one in the present study. Periodicities up to   T₅₀   contribute up to 50% of total variance.  The phase spectra were plotted as cumulative(%) normalized(normalized to total rotation) phase .The variance and phase spectra along with statistical normal distribution is shown in Figure 6. The 'goodness of fit' (statistical chi-sqr test)between the variance spectrum and statistical normal distribution is significant at <= 5% level. The phase spectrum is close to the statistical normal distribution, but the 'goodness of fit' is not statistically significant. However , the 'goodness of fit'  between variance and phase spectra are statistically significant (chi-sqr test) for individual dominant wavebands (Figures 7a and 7b).

    The cumulative percentage contribution to total variance and the cumulative(%) normalized phase(normalized w.r.t. the total rotation) for each dominant waveband is computed for significant wavebands and shown in Figures 7a and 7b to illustrate Berry's phase,namely the progressive increase in phase with increase in period and also the close association between phase and variance(see Section 2).

The statistically significant(less than or equal to 5% level) wavebands are shown in Figure 8.

    Table 1 gives the list of a total of 110 dominant(normalised variance greater than 1) wavebands obtained from the continuous periodogram analyses for the data set (prime numbers in the interval 3 to 1000 at unit class intervals) . The symbol * indicates that the dominant waveband is statistically significant at <= 5% level. There are 14 significant dominant wavebands (Figure 8). The dominant peak periodicities  are in close agreement with model predicted dominant peak periodicities,e.g  2.2, 3.6, 5.8, 9.5, 15.3, 24.8, 40.1, and 64.9 prime number spacing intervals for values of n ranging from -1 to 6 (Equation 4).The symbol S indicates that the normalised variance and phase spectra follow each other closely (the 'goodness of fit ' being significant at <= 5% ) displaying Berry 's phase in the quantum-like chaos exhibited by prime number distribution . Earlier study by Marek Wolf (May 1996, IFTUWr 908/96 http://rose.ift.uni.wroc.pl/~mwolf ) also shows that the number of Twins(spacing interval 2) and primes separated by a gap of length 4 ( "cousins") is almost the same and it determines a fractal structure on the set of primes. The conjecture that there should be approximately equal numbers of prime power pairs differing by 2 and by 4 , but about twice as many differing by 6 is proved to be true by Gopalkrishna Gadiyar and Padma(1999 http://www.maths.ex.ac.uk/~mwatkins/zeta/padma.pdf). The dominant perodicities shown above at Figure 8 are consistent with these reported results.
The period T₅₀ upto which the cumulative percentage contribution to total variance is equal to 50  is found to be equal to 3.242 spacing interval between two adjacent primes. This periodogram estimate of T₅₀ for the prime numbers in the interval 3 to 1000 is in  approximate agreement with model predicted value of T₅₀ approximately equal to 3.6 (Equation 9). The dominant significant period 2 corresponds to twin primes . In number theory [Rose,1995; Beiler,1966] the twin prime conjecture states that there are many pairs of primes p,q where q = p + 2 . There are infinitely many prime pairs as z tends to infinity.
 

                                 Table 1
 

No	Periodicities in unit number class intervals
	Peak period	Wave band
1	2.000	2.000 to 2.006 *
2	2.010	2.010..to..2.010 *
3	2.014	2.014..to..2.014
4	2.022	2.022..to..2.022
5	2.034	2.034..to..2.034
6	2.077	2.077..to..2.077
7	2.100	2.098..to..2.100
8	2.113	2.113..to..2.113
9	2.136	2.136..to..2.136
10	2.143	2.141..to..2.145
11	2.149	2.149..to..2.149
12	2.164	2.164..to..2.164
13	2.199	2.197..to..2.199
14	2.235	2.235..to..2.235
15	2.266	2.264..to..2.266
16	2.307	2.305..to..2.310
17	2.333	2.331..to..2.335 *
18	2.356	2.356..to..2.356
19	2.364	2.364..to..2.366
20	2.445	2.443..to..2.448
21	2.467	2.467..to..2.470
22	2.500	2.497..to..2.505 *
23	2.615	2.615..to..2.617
24	2.625	2.623..to..2.628
25	2.657	2.654..to..2.657
26	2.711	2.708..to..2.711
27	2.727	2.724..to..2.730
28	2.749	2.746..to..2.752
29	2.801	2.796..to..2.804 *
30	2.890	2.890..to..2.890
31	2.925	2.925..to..2.925
32	2.936	2.933..to..2.936
33	2.969	2.969..to..2.969
34	2.999	2.987..to..3.014 *
35	3.023	3.023..to..3.023
36	3.050	3.047..to..3.050
37	3.143	3.143..to..3.146
38	3.252	3.252..to..3.252
39	3.288	3.288..to..3.288
40	3.297	3.294..to..3.301
41	3.334	3.327..to..3.341 *
42	3.347	3.347..to..3.351
43	3.361	3.361..to..3.364
44	3.456	3.442..to..3.456
45	3.470	3.470..to..3.473
46	3.498	3.491.to..3.505 *S
47	3.537	3.537.to..3.540
48	3.558	3.558..to..3.558
49	3.666	3.663..to..3.670
50	3.688	3.685..to..3.688
51	3.714	3.707..to..3.722
52	3.748	3.744..to..3.755
53	3.782	3.778..to..3.782
54	3.820	3.816..to..3.823
55	3.881	3.881..to..3.881
56	4.125	4.125..to..4.125
57	4.200	4.196..to..4.204
58	4.247	4.242..to..4.247
59	4.285	4.281..to..4.294
60	4.333	4.320..to..4.346 S
61	4.372	4.367..to..4.376
62	4.402	4.394..to..4.407
63	4.568	4.568..to..4.568
64	4.600	4.596..to..4.605
65	4.670	4.656..to..4.679 *
66	4.717	4.717..to..4.722
67	4.750	4.745..to..4.760
68	4.774	4.769..to..4.779
69	4.939	4.934..to..4.944
70	4.964	4.964..to..4.969
71	4.999	4.984..to..5.014 * S
72	5.034	5.034..to..5.034
73	5.084	5.074..to..5.094
74	5.161	5.161..to..5.161
75	5.197	5.192..to..5.197
76	5.250	5.250..to..5.250
77	5.497	5.491..to..5.502
78	5.813	5.802..to..5.819
79	5.913	5.907..to..5.919
80	5.949	5.943..to..5.960
81	6.002	5.972..to..6.026 *S
82	6.051	6.044..to..6.057
83	6.087	6.081..to..6.087
84	6.124	6.124..to..6.130
85	6.279	6.272..to..6.285
86	6.329	6.323..to..6.329
87	6.496	6.489..to..6.502
88	6.995	6.974..to..7.023 *
89	7.346	7.324..to..7.361
90	7.509	7.472..to..7.539 S
91	7.638	7.615..to..7.653
92	8.102	8.086..to..8.119
93	8.399	8.366..to..8.425
94	8.501	8.484..to..8.526
95	9.986	9.926..to..10.066 * S
96	10.540	10.508..to..10.571
97	10.981	10.915..to..11.036
98	12.977	12.912..to..13.029 S
99	13.212	13.212..to..13.226
100	14.001	13.876..to..14.128 * S
101	15.031	14.897..to..15.152 S
102	15.458	15.412..to..15.505
103	17.050	16.948..to..17.153 S
104	22.113	21.871..to..22.335 S
105	28.793	28.450..to..29.025 S
106	29.998	29.581..to..30.452 S
107	31.223	31.192..to..31.254
108	42.020	41.353..to..42.655 S
109	198.571	192.702..to..204.414 S
110	1534.787	965.984..to..3402.097 S

 
 

3.4    Spiral  Pattern of Prime number distribution in the x-y plane

    The z^th prime is approximately equal to zln z [ Allenby and Redfern, 1989 ]. In the following it is shown that the prime numbers are arranged in a spiral pattern in the x-y plane. The eqiangular logarithmic spiral shown at Figure 2 is given by the relation

    The z^th prime number has an angular  phase difference equal to 1/z radians from the earlier (z-1)^th  prime.  The spiral arrangement of the first 20 and 100 primes are shown respectively in Figures 9 and 10. Spiral patterns in the arrangement of prime numbers have been reported earlier by mathematicians, e.g (http://zaphod.uchicago.edu/~bryan/spiral/index.html .)
 

Figure 10: The location in the x-y plane  of the first 100 prime numbers. The spiralling arms closely resemble phyllotaxis-like patterns such as that seen in  the familiar spiral patterns found in the arrangement of leaves on a stem, in florets of composite flowers, the pattern of scales on pineapple and pine cone, etc.  http://xxx.lanl.gov/abs/chao-dyn/9806001

    In mathematics Cantorian fractal space-time is now associated with reference to quantum systems [Nottale,1989; Ord, 1983; El Naschie, 1993; El Naschie,1998]. Recent studies indicate a close association between number theory in mathematics, in particular, the distribution of prime numbers and the chaotic orbits of excited quantum systems such as the hydrogen atom [Cipra, 1996; Berry,1992; Cipra http://www.maths.ex.ac.uk/~mwatkins/zeta/cipra.htm ]. The cell dynamical system model presented in this paper shows that quantum-like chaos incorporates prime number distribution functions in the description of atmospheric flow dynamics.
 
 

Acknowledgements

The author is grateful to Dr. A. S. R. Murty for his keen interest and encouragement during the course of the study.