A macroscopical entangled coherent state generator in a V configuration atom system

Abstract

In this paper, we propose a scheme to produce pure and macroscopical entangled coherent state. When a three-level "V" configuration atom interacts with a doubly reasonant cavity, under the strong classical driven condition, entangled coherent state can be generated from vacuum fields. An analytical solution for this system under the presence of cavity losses is also given.

Simultaneous electromagnetically induced transparency for two circularly polarized lasers coupled to the same linearly polarized laser in a four-level atomic system in the W scheme

“…Thus, for I 2 < I 3 only a small change of a few percent can be observed in the slope of Re(ρ 03 ). In conclusion, we have observed that when the B field takes on values in the range established by the boundary conditions (10) and (11), there is no significant change in the transit time from the normal dispersive region to EIT region (see Section IV C), or in the width EIT from Section IV D.…”

“…In recent years, many extensive studies have been devoted to three-level atomic systems, such as the V system [8,10], the system [11], and the ladder system [12], in which two optical fields are used and, due to quantum interference, one of them is slowed down. Recently, the propagation of a weak probe field in various laser-driven four-level atomic systems was investigated [13].…”

Generating a Squeezed‐Coherent‐Cat State in a Double‐Cavity Optomechanical System

“…[1][2][3][4][5][6] Numerous schemes have been proposed to generate an entangled coherent state. [7][8][9][10][11] The superposition of coherent state has been realized in experiments such as in superconducting Josephson junctions system, [12] cavity QED system, [13] linear optical system. [14] Optomechanical system, by coupling mechanical resonators to the fields of optical cavities, can provide an available device to observe quantum mechanical behaviors of mesoscopic and even macroscopic systems.…”

Generation of Genuine Tripartite Macroscopic Entanglement in Y-type System

“…In the past decades, entangled states between individual qubits have been extensively studied where entanglement is carried by discontinuous states. In recent years, continuous-variable (CV) entanglement has attracted much attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] because its many advantages [1]. Traditional schemes of generating CV entanglement is based on the parametric down conversion process [20,21].…”