Showing 1998 · quant-phShow all

9 papers · 2 filters

quant-ph1998★ 2 cited

The 1/N-expansion, quantum-classical correspondence and nonclassical states generation in dissipative higher-order anharmonic oscillators

Kirill N. Alekseev, Jan Perina

We develop a method for the determination of thecdynamics of dissipative quantum systems in the limit of large number of quanta N, based on the 1/N-expansion of Heidmann et al. [ O…

quant-ph1998★ 8 cited

Quantum cryptography based on photon ``frequency'' states: example of a possible realization

S. N. Molotkov

A quantum cryptosystem is proposed using single-photon states with different frequency spectra as information carriers. A possible experimental implementation of the cryptosystem i…

quant-ph1998★ 5 cited

Photon Frequency Entanglement Swapping

S. N. Molotkov, S. S. Nazin

We propose a simple non-linear crystal based optical scheme for experimental realization of the frequency entanglement swapping between the photons belonging to two independent bip…

quant-ph1998★ 2 cited

Quantum dynamics in canonical and micro-canonical ensembles. Part II. Tunneling in double well potential

V. Filinov, Yu. Lozovik, A. Filinov +2

In the second part of this paper in micro canonical ensemble the new numerical approach for consideration of quantum dynamics and calculations of the average values of quantum oper…

quant-ph1998★ 230 cited

Coding Theorems for Quantum Channels

Alexander S. Holevo

The more than thirty years old issue of the (classical) information capacity of quantum communication channels was dramatically clarified during the last years, when a number of di…

quant-ph1998★ 1 cited

Sending Quantum Information with Gaussian States

Alexander S. Holevo

Quantum information characteristics, such as quantum mutual information, loss, noise and coherent information are explicitly calculated for Bosonic attenuation/amplification channe…

quant-ph1998★ 15 cited

Squeezed Light Generation in Nonlinear System with Chaotic Dynamics

Kirill N. Alekseev

The squeezing in a nonlinear system with chaotic dynamics is considered. The model describing interaction of collection of two-level atoms with a single-mode of self-consistent fie…

quant-ph1998★ 6 cited

Experimental scheme for quantum teleportation of a single-photon packet

S. N. Molotkov

Both complete protocol and optical setup for experimental realization of quantum teleportation of unknown single-photon wave packet are proposed.

quant-ph1998★ 1 cited

Symmetry as a source of hidden coherent structures in quantum physics: general outlook and examples

Valery P. Karassiov

A general algebraic approach, incorporating both invariance groups and dynamic symmetry algebras, is developed to reveal hidden coherent structures (closed complexes and configurat…