Numerical and analytical approach to the quantum dynamics of two coupled spins in bosonic baths

被引：29
|
作者：
Sergi, Alessandro [1 ]
Sinayskiy, Ilya [2 ]
Petruccione, Francesco [2 ,3 ]
机构：
[1] Univ KwaZulu Natal, Sch Phys, ZA-3209 Pietermaritzburg, South Africa
[2] Univ KwaZulu Natal, Sch Phys, Quantum Res Grp, ZA-4001 Durban, South Africa
[3] Univ KwaZulu Natal, Natl Inst Theoret Phys, ZA-4001 Durban, South Africa
来源：
PHYSICAL REVIEW A | 2009年 / 80卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
INFLUENCE FUNCTIONALS;
D O I：
10.1103/PhysRevA.80.012108
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The quantum dynamics of a spin chain interacting with multiple bosonic baths is described in a mixed Wigner-Heisenberg representation. The formalism is illustrated by simulating the time evolution of the reduced density matrix of two coupled spins, where each spin is also coupled to its own bath of harmonic oscillators. In order to prove the validity of the approach, an analytical solution in the Born-Markov approximation is found. The agreement between the two methods is shown.
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页数：7
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