Quantum speed limit in the thermal spin-boson system with and without tunneling term

被引：5

作者：

Dehdashti, Sh ^{[1
,2
]}

Yasar, F. ^{[2
]}

Harouni, M. Bagheri ^{[3
]}

Mahdifar, A. ^{[4
]}

Mirza, B. ^{[5
]}

机构：

[1] Queensland Univ Technol, Sch Informat Syst, Brisbane, Qld, Australia

[2] Univ Wisconsin Madison, Coll Engn, Mat Sci & Engn Dept, Madison, WI 53706 USA

[3] Univ Isfahan, Fac Sci, Dept Phys, Hezar Jerib St, Esfahan 8174673441, Iran

[4] Shahrekord Univ, Fac Sci, Dept Phys, Shahrekord 8818634141, Iran

[5] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran

来源：

QUANTUM INFORMATION PROCESSING | 2020年 / 19卷 / 09期

关键词：

Spin-boson system; Quantum speed limit; Tunneling term; DECOHERENCE; EVOLUTION; STATES;

D O I：

10.1007/s11128-020-02807-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we study the spin-bosonic model, with and without tunneling terms, in detail. The spin-bosonic model without tunneling is studied by using the thermofield dynamics approach. Indeed, by considering temperature, we show that environmental states, while they become entangled with system, approach thermal coherent states with different phases. In addition, by considering the tunneling term, we study the interplay of the environmental cut-off frequency as well as the impacts of environmental temperature on the quantum speed limit in both cases, i.e., spin-boson system with and without tunneling term. In these studies, we indicate temperature play more important role in compare with cut-off frequency to control the quantumness of a spin system.

引用

页数：17

共 50 条

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Sh. Dehdashti
F. Yasar
M. Bagheri Harouni
A. Mahdifar
B. Mirza
[J]. Quantum Information Processing, 2020, 19
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