QUANTUM FIDELITY OF TWO-MODE GAUSSIAN STATES IN A THERMAL RESERVOIR

被引：0

作者：

Cuzminschi, Marina ^{[1
,2
]}

Zubarev, Alexei ^{[2
,3
]}

Isar, Aurelian ^{[1
,2
,4
]}

机构：

[1] Horia Hulubei Natl Inst Phys & Nucl Engn, Dept Theoret Phys, POB MG-6, RO-077125 Bucharest, Romania

[2] Univ Bucharest, Fac Phys, Bucharest, Romania

[3] Natl Inst Laser Plasma & Radiat Phys, Bucharest, Romania

[4] Acad Romanian Scientists, 54 Splaiul Independentei, RO-050094 Bucharest, Romania

来源：

PROCEEDINGS OF THE ROMANIAN ACADEMY SERIES A-MATHEMATICS PHYSICS TECHNICAL SCIENCES INFORMATION SCIENCE | 2019年 / 20卷 / 03期

关键词：

Uhlmann fidelity; Gaussian states; open quantum systems; squeezed thermal states; POLARIZATION;

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The dynamics of quantum fidelity of two non-coupled bosonic modes interacting with a common thermal reservoir is studied in terms of the covariance matrix, in the framework of the theory of open systems based on completely positive quantum dynamical semigroups. As initial states there are considered an entangled squeezed vacuum state and a squeezed thermal state. We study the dependence of quantum fidelity on time, temperature, squeezing parameter and average numbers of thermal photons. We deduce the asymptotic expression of quantum fidelity and prove that it takes a non-zero value in the limit of large times.

引用

页码：251 / 258

页数：8

共 30 条

[1] Towards fault-tolerant quantum computing with trapped ions [J].