Superradiant States in Semiconductor Heterostructures: Displaced Fock States or Coherent-States Superpositions?

2021 ◽  
Author(s):  
Peter P. Vasil’ev
Keyword(s):  
Coherent States ◽  
Semiconductor Heterostructures ◽  
Fock States

scholarly journals On the Coherent States Associated with Deformed Bogoliubov (p,q)-Transformations without First Finite Fock States

2004 ◽  
Vol 112 (5) ◽  
pp. 811-829 ◽  
Author(s):  
M. H. Naderi ◽  
R. Roknizadeh ◽  
M. Soltanolkotabi
Keyword(s):  
Coherent States ◽  
Fock States

scholarly journals EXPERIMENTAL QUANTIFICATION OF NON-GAUSSIANITY OF PHASE-RANDOMIZED COHERENT STATES

2012 ◽  
Vol 10 (08) ◽  
pp. 1241006 ◽  
Author(s):  
ALESSIA ALLEVI ◽  
STEFANO OLIVARES ◽  
MARIA BONDANI
Keyword(s):  
Experimental Investigation ◽  
Wigner Function ◽  
Coherent States ◽  
The Other ◽  
Fock States ◽  
Two Measures ◽  
Non Gaussian

We present the experimental investigation of the non-Gaussian nature of some mixtures of Fock states by reconstructing their Wigner function and exploiting two recently introduced measures of non-Gaussianity. In particular, we demonstrate the consistency between the different approaches and the monotonicity of the two measures for states belonging to the class of phase-randomized coherent states. Moreover, we prove that the exact behavior of one measure with respect to the other depends on the states under investigation and devise possible criteria to discriminate which measure is more useful for the characterization of the states in realistic applications.

Coherent States and Fock States at Very High Average Photon Numbers

1981 ◽  
Vol 34 (4) ◽  
pp. 357
Author(s):  
GJ Troup ◽  
HS Perlman
Keyword(s):  
Coherent State ◽  
Field Intensity ◽  
Laser Field ◽  
Coherent States ◽  
Photon Number ◽  
Constant Field ◽  
Fock States ◽  
Fock State ◽  
Very High ◽  
Average Photon Number

A laser field may be idealized as a coherent state, but it is often more convenient to use Fock states fQr quantum electrodynamical calculations. A Fock state implies fluctuations in the field intensity, aptl a constant field intensity (coherent state) implies fluctuations in the photon number. Both these effects are discussed rigorously. When the average photon number tends to infinity, these different states become asymptotically indistinguishable.

Quantum motion, coherent states and geometric phase of a generalized damped pendulum

2021 ◽  
pp. 2150087
Author(s):  
I. A. Pedrosa
Keyword(s):  
Coherent States ◽  
Quantum Dynamics ◽  
Angular Displacement ◽  
Time Dependent ◽  
Time Varying ◽  
Fock States ◽  
Berry Phases ◽  
Quantum Motion ◽  
Varying Mass ◽  
Invariant Approach

In this work, we analyze the quantum dynamics of a generalized pendulum with a time-varying mass increasing exponentially and constant gravitation. By using Lewis–Riesenfeld invariant approach and Fock states, we solve the time-dependent Schrödinger equation for this system and write its solutions in terms of solutions of the Milne–Pinney equation. We also construct coherent states for the quantized pendulum and use both Fock and coherent states to investigate some important physical proprieties of the quantized pendulum such as eigenvalues of the angular displacement and momentum, their quantum variances as well as the respective uncertainty principle. Finally, we derive the geometric, dynamical and Berry phases for the time-dependent generalized pendulum.

Analytic Representations Based on SU(1,1) Lie Algebra Coherent States for Squeezed Displaced Fock States

2006 ◽  
Vol 16 (1-2) ◽  
pp. 3-11
Author(s):  
Gamal Mohamed Abd Al-Kader ◽  
Abdel-Shafy F. Obada
Keyword(s):  
Lie Algebra ◽  
Coherent States ◽  
Fock States

Projection operators for asymmetric two-mode coherent states and two-mode Fock states

2020 ◽  
Vol 41 (4) ◽  
pp. 045301
Author(s):  
Wang Shuai ◽  
Sui Yong-Xing ◽  
Zhu Xiao-Qin
Keyword(s):  
Coherent States ◽  
Projection Operators ◽  
Fock States

NONLINEAR DISPLACED FOCK STATE REPRESENTATION

2001 ◽  
Vol 15 (04n05) ◽  
pp. 163-173 ◽  
Author(s):  
HONGYI FAN ◽  
HAILING CHENG
Keyword(s):  
Coherent States ◽  
Completeness Relation ◽  
State Representation ◽  
Fock States ◽  
Fock State

As a generalization of the nonlinear coherent states we construct nonlinear displaced Fock states (NLDFS). In contrast to the ordinary displaced Fock state, two kinds of NLDFS are introduced, which are composed by nonlinear displacing operator on the nonlinear Fock states Df(α)| n>f and [Formula: see text]. The over-completeness relation for NLDFS is obtained by virtue of the generalized technique of integration within an ordered product of operators. Generation of some kind of NLDFS is briefly discussed.

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