Open AccessDynamics of field observables in quantum channels
Author(s) -
S. Yu. Medvedeva,
Andrei Gaidash,
Anton Kozubov,
G. P. Miroshnichenko
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1984/1/012007
Subject(s) - observable , physics , quantum mechanics , coherent states , superposition principle , quantum optics , squeezed coherent state , quantum state , quantum dynamics , quantum , density matrix , vacuum state , quantum superposition , formalism (music) , photon , art , musical , visual arts
We consider the time evolution of the mean values of the quadrature operators’ observables and the dynamics of the mean photon number variance for an arbitrary quantum state in a single mode transmitted through an optical fiber channel. Utilizing the density matrix formalism and the quantum optics theory we derive expressions for the dynamics of mentioned field observables for such prominent quantum states as squeezed vacuum state, squeezed coherent state and superposition of coherent states.