Changing Fock matrix elements of two-mode squeezed vacuum state by employing three conditional operations in one-sided lossy channel
Abstract
This paper focuses on changing Fock matrix elements of two-mode squeezed vacuum state (TMSVS) by employing three conditional operations in one-sided lossy channel. These three conditional operations include one-photon replacement (OPR), one-photon substraction (OPS) and one-photon addition (OPA). Indeed, three conditional quantum states have been generated from the original TMSVS. Using the characteristic function (CF) representation of quantum density operator, we derive the analytical expressions of their Fock matrix elements, which depend on the interaction parameters, including the squeezing parameter of the input TMSVS, the loss factor and the transmissivity of the variable beam splitter. For convenience of discussion, we only give the Fock matrices in the subspace span 01 .
- Publication:
-
Physica Scripta
- Pub Date:
- April 2020
- DOI:
- 10.1088/1402-4896/ab5c8f
- arXiv:
- arXiv:1906.09592
- Bibcode:
- 2020PhyS...95d5101Z
- Keywords:
-
- two-mode squeezed vacuum state;
- Fock matrix elements;
- twin-Fock state;
- conditional measurement;
- beam splitter;
- characteristic function;
- Quantum Physics
- E-Print:
- 9 pages, 5 figures. Some typos are corrected