The Use of Coherent States in the Theory of Quantum Crystals

1972 ◽  
Vol 50 (16) ◽  
pp. 1815-1825 ◽  
Author(s):  
J. Noolandi ◽  
J. Van Kranendonk
Keyword(s):  
Correlation Function ◽  
Coherent State ◽  
Liquid Helium ◽  
Recent Work ◽  
Single Particle ◽  
Coherent States ◽  
Short Range ◽  
Particle Distributions ◽  
Quantum Crystals ◽  
Short Range Correlations

The coherent state formalism is applied to the calculation of the phonon frequencies in quantum crystals. The normal mode frequencies are determined using an expansion in powers of the displacements of the centers of the single-particle distributions rather than of the particles. The known results of the RPA and of Meissner's inversion of the displacement–displacement correlation function are derived in a simple way, and the connection with Feynman's method for liquid helium is discussed. The method of constant short-range correlations is introduced and compared with the recent work of Koehler and Werthamer.

Rapidity distributions and rapidity–gap correlations in multiparticle production at 50 and 400 GeV/c

1985 ◽  
Vol 63 (4) ◽  
pp. 466-471 ◽  
Author(s):  
S. Ahmad ◽  
H. Ahrar ◽  
M. Zafar ◽  
M. Shafi
Keyword(s):  
Single Particle ◽  
Short Range ◽  
Charged Particles ◽  
Projectile Fragmentation ◽  
Proton Collisions ◽  
Secondary Particles ◽  
Target Mass ◽  
Rapidity Gap ◽  
Rapidity Distributions ◽  
Short Range Correlations

Results on the single particle rapidity distributions and rapidity–gap correlations among hadrons produced in 50 GeV/c π−-meson and 400 GeV/c proton collisions with emulsion nuclei have been investigated. Study of the rapidity distributions reveals that the projectile fragmentation is mass independent and the target fragmentation depends upon the target mass. From the rapidity–gap distributions, we find evidence for short-range correlations that indicate that the secondary particles are produced via cluster formations and each cluster should consist of at least three charged particles.

scholarly journals The influence of state dependent short range correlations on the depletion of the nuclear Fermi sea

2020 ◽  
Vol 5 ◽  
pp. 158
Author(s):  
G. A. Lalazissis ◽  
S. E. Massen ◽  
C. P. Panos
Keyword(s):  
Shell Model ◽  
Single Particle ◽  
Short Range ◽  
State Dependence ◽  
Closed Shell ◽  
State Dependent ◽  
Occupation Numbers ◽  
Closed Shell Nuclei ◽  
The One ◽  
Short Range Correlations

The influence of state dependent short range correlations on the occupation numbers of the single particle shell model orbits of the doubly closed shell nuclei 16O and 40Ca is examined. The study shows that the effect of the state dependence of the short range correlations is rather small. The total depletion of the nuclear Fermi sea changes slightly compared with the one calculated by considering state independent short range correlations.

Effect of Short Range Correlations in Charged Pion Photoproduction from 16O

1975 ◽  
Vol 53 (13) ◽  
pp. 1292-1298 ◽  
Author(s):  
K. Srinivasa Rao ◽  
V. Devanathan
Keyword(s):  
Wave Function ◽  
Correlation Function ◽  
Short Range ◽  
Unitary Operator ◽  
Charged Pion ◽  
Pion Photoproduction ◽  
Nuclear Wave Function ◽  
Positive Pion ◽  
Short Range Correlations

Short range correlations in nuclei are introduced into the nuclear wave function using a unitary operator whose form was originally suggested by Villars. Their effect on positive pion photoproduction from 16O is found to be small for the correlation function we have assumed.

Distribution and Correlation of the Coding Sequence Lengths in Bacterial Genomes

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Vasile V. Morariu
Keyword(s):  
Correlation Analysis ◽  
Exponential Function ◽  
Short Range ◽  
Statistical Physics ◽  
Bacterial Genomes ◽  
Coding Sequence ◽  
Correlation Properties ◽  
Short Range Correlations ◽  
Fluctuating System

The length of coding sequence (CDS) series in bacterial genomes were regarded as a fluctuating system and characterized by the methods of statistical physics. The distribution and the correlation properties of CDS for 47 genomes were investigated. The distribution was found to be approximated by an exponential function while the correlation analysis revealed short range correlations.

On the single-particle-energy spectrum of a Λ particle in nuclear matter

1970 ◽  
Vol 48 (23) ◽  
pp. 2804-2808 ◽  
Author(s):  
K. F. Chong ◽  
Y. Nogami ◽  
E. Satoh
Keyword(s):  
Energy Spectrum ◽  
Nuclear Matter ◽  
Single Particle ◽  
Short Range ◽  
Particle Energy ◽  
Pair Approximation ◽  
Single Particle Energy ◽  
Short Range Repulsion ◽  
Separable Potentials ◽  
Independent Pair

The single-particle-energy spectrum of a Λ particle in nuclear matter is examined in the independent-pair approximation, by assuming nonlocal separable potentials for the ΛN interaction. Effects of short-range repulsion in the ΛN interaction on the Λ binding are also examined in terms of separable potentials of rank two.

INTERACTION OF MESOSCOPIC JOSEPHSON JUNCTION WITH A SUCCESSIVE SQUEEZED COHERENT FIELD

2000 ◽  
Vol 14 (16) ◽  
pp. 609-618
Author(s):  
V. A. POPESCU
Keyword(s):  
Coherent State ◽  
Josephson Junction ◽  
Coherent States ◽  
Quantum Noise ◽  
Shapiro Steps ◽  
Superconducting Ring ◽  
Coherent Field ◽  
Current Voltage ◽  
Quantum Current ◽  
The Difference

Signal-to-quantum noise ratio for quantum current in mesoscopic Josephson junction of a circular superconducting ring can be improved if the electromagnetic field is in a successive squeezed coherent state. The mesoscopic Josephson junctions can feel the difference between the successive squeezed coherent states and other types of squeezed coherent states because their current–voltage Shapiro steps are different. We compare our method with another procedure for superposition of two squeezed coherent states (a squeezed even coherent state) and consider the effect of different large inductances on the supercurrent.

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