Results 221 to 230 of about 18,776 (268)

Squeezed states and Shannon entropy

Physical Review A, 1994
A wave-function approach to the interaction Hamiltonian for the degenerate parametric amplifier has been recently presented [C. G. Bollini and L. E. Oxman, Phys. Rev. A 47, 2339 (1993)]. We want to show here that a maximum entropy principle density matrix approach can be used to reobtain all the results shown in this reference, and also to avoid the ...
, Aliaga, , Crespo, , Proto
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Atomic states with spectroscopic squeezing

Physical Review A, 1994
The spectroscopic squeezing characteristics of the angular-momentum state exp(θ S z ) exp[-(iπ /2)S y ]|| S,m> are calculated. The parameter √2S ΔS x /|| >S z >> is shown to be less than or equal to 1 and takes the asymptotic value (1+S) -½ as θ → 0 if m⊗0.
, Agarwal, , Puri
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Squeezed States in Josephson Junctions

AIP Conference Proceedings, 2004
We consider the superconductive regime of a Josephson junction with an external biasing circuit. After recalling that the eigenvalue equation of the junction Hamiltonian HJ is a special case of the Mathieu equation, we diagonalize HJ in a suitable Fock space and prove that this leads quite naturally from the use of the two‐boson algebra.
RAFFA, Francesco Antonino, FAORO L, RASETTI, Mario   +2 more
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Dipole Squeezing and Spin Squeezed States

2016
In the preceding chapters, we have demonstrated how squeezed light applied to optical systems may lead to the prediction of subnatural linewidths in the radiation spectra and the possibility to improve the precision of measurements beyond the standard quantum limit .
Zbigniew Ficek, Ryszard Tanaś
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Quasiprobabilities based on squeezed states

Journal of Statistical Physics, 1988
We introduce quasiprobabilities based on the so-called squeezed states to represent the density operator of an oscillator. Such representations become especially useful for oscillators designed to display, strong excitation notwithstanding, pronounced quantum features such as squeezing of the quantum fluctuations of certain observables below the limit ...
F Haake, M Wilkens
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Phase distributions of squeezed number states and squeezed thermal states

Quantum Optics: Journal of the European Optical Society Part B, 1993
Phase properties of squeezed number states and squeezed thermal states are studied. Exact analytical formulae for phase distributions based on different phase approaches are derived and illustrated graphically. It is shown that the phase quasiprobability distribution P(W)( theta ) associated with the Wigner function does not depend on the photon number
A V Chizhov, Ts Gantsog, B K Murzakhmetov   +2 more
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Properties of Squeezed Binomial States and Squeezed Negative Binomial States

Journal of Modern Optics, 1991
The effect of squeezing on binomial and negative binomial state has been studied in terms of quasiprobability of Wigner function and their photon number distributions. The results presented for squeezed binomial (negative binomial) states may be useful when one makes transients from squeezed coherent states to squeezed number (quasi- thermal) states.
Amitabh Joshi, S. V. Lawande
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Coordinate representation of squeezed states

Physical Review A, 1988
We obtain the wave function in the coordinate representation of the one-mode squeezed states || ζ, α>=exp(ζa ^2 -ζa 2 )exp(αa^-αa)||0>. The wave function is a displaced Gaussian with center and width depending upon the parameters α and ζ.
, Rai, , Mehta
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Squeezed vacuum state in lossy channel as a squeezed thermal state

Modern Physics Letters B, 2015
In this paper, we alternatively study the evolution of squeezed vacuum state (SVS) in lossy channel by virtue of the phase space method. By using the formula of Wigner function (WF) in coherent representation and [Formula: see text] representation of quantum density operator, the WF formula in lossy channel is derived.
Hong-Chun Yuan, Xue-Xiang Xu
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‘‘Squeezed states’’ in Helmholtz optics

Physical Review A, 1993
Squeezed states have been described in optics with the mathematics of quantum mechanics. Yet, electromagnetic fields of a single color obey the Helmholtz equation, of which the Schrodinger equation is but the paraxial (parabolic) approximation. We extend the ordinary squeezed states to solutions of the Helmholtz equation that contain them as their ...
, Wolf, , Kurmyshev
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