TY - JOUR ID - 1742 TI - Simulation of thermal fragility of vacuum squeezing in two photon lossy cavity JO - Iranian Journal of Physics Research JA - IJPR LA - en SN - 1682-6957 AU - Sadeghi, M AU - Ahmadi, S AD - Department of Physics, University of Hormozgan, Bandar-e-Abbas, Iran Y1 - 2022 PY - 2022 VL - 21 IS - 4 SP - 663 EP - 675 KW - simulation KW - Squeezed vacuum KW - Squeezing fragility KW - Two-photon loss DO - 10.47176/ijpr.21.4.11190 N2 - In this research, squeezing fragility due to thermal bath, in quantum squeezed state generation, is simulated. For this purpose, single mode dissipative cavity with non-zero second-order susceptibility is used. Cavity nonlinear medium is driving by laser pump with known frequency, and pairs of identical photons are created, with one-half frequency of driving pump. This process known as degenerate parametric down conversion. In the absence of any dissipation, simulation shows linear time dependent squeezing parameter, which is in agreement with theoretical results. In two photon loss of cavity in contact with cold reservoir, competition between gain and two photon loss, results in stable squeezing of initial vacuum, in steady state of system. At the end, has been shown that, non-zero thermal reservoir, omits the squeezing and leads the final cavity field to the thermal mixture of Fock states. UR - https://ijpr.iut.ac.ir/article_1742.html L1 - https://ijpr.iut.ac.ir/article_1742_39a2f59dc5db083189411e648c216812.pdf ER -