Using coherent feedback loop for high quantum state transfer in optomechanics

被引：18

作者：

Amazioug, M. ^{[1
,2
]}

Maroufi, B. ^{[2
,3
]}

Daoud, M. ^{[4
,5
]}

机构：

[1] Mohammed V Univ, Dept Phys, Ecole Normale Super ENS, Rabat, Morocco

[2] Mohammed V Univ, Fac Sci, Dept Phys, LPHE MS, Rabat, Morocco

[3] Univ Hassan 2, Fac Sci Ben MSik, Dept Phys, LPMC, Casablanca, Morocco

[4] Univ Ibn Tofail, Fac Sci, Dept Phys, Kenitra, Morocco

[5] Abdus Salam Int Ctr Theoret Phys, Str Costiera 11, I-34151 Trieste, Italy

来源：

PHYSICS LETTERS A | 2020年 / 384卷 / 27期

关键词：

Cavity optomechanics; Coherent feedback; Parametric amplifier; Duan criterion; Logarithmic negativity; Entanglement; SUDDEN-DEATH; ENTANGLEMENT; CRITERION;

D O I：

10.1016/j.physleta.2020.126705

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the coherent feedback loop scheme to improve the quantum correlations transfer from optical to mechanical degrees of freedom in a double cavity optomechanical system. We use the Duan criterion to determine the separability of the two-mode mechanical states. The logarithmic negativity is employed to quantify the amount of the entanglement between mechanical modes in steady and dynamical regimes. We show that the entanglement can be significantly enhanced by a coherent feedback using a suitable tuning of the reflectivity parameter of the beam splitter located in each cavity. We also show that this enhancement is influenced by the temperature, the light squeezing parameter and the gain of the parameter amplifier. The entanglement dynamics in presence of the coherent feedback loop is also analyzed. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：10

共 63 条

[31] Phase-noise measurement in a cavity with a movable mirror undergoing quantum Brownian motion [J].