Integrability-Based Analysis of the Hyperfine-Interaction-Induced Decoherence in Quantum Dots
Integrability-Based Analysis of the Hyperfine-Interaction-Induced Decoherence in Quantum Dots
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DOI：
10.1103/physrevlett.110.040405
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发表时间：
2013-01-25
影响因子：
8.6
通讯作者：
Schuricht, Dirk
中科院分区：
文献类型：
--
作者：
Faribault, Alexandre;Schuricht, Dirk
使用代数 Bethe ansatz 与简单的蒙特卡罗采样技术相结合，我们研究了与核旋转浴耦合的中心自旋的退相干问题。我们详细描述了从强外部磁场到弱外部磁场的完全交叉，这是发现大的非衰减相干因子的极限。这一特征可以通过类似玻色-爱因斯坦凝聚态的物理学来解释，这也使我们能够论证相应的零频率峰值不会通过统计或系综平均而变宽。 DOI：10.1103/PhysRevLett.110.040405
Using the algebraic Bethe ansatz in conjunction with a simple Monte Carlo sampling technique, we study the problem of the decoherence of a central spin coupled to a nuclear spin bath. We describe in detail the full crossover from strong to weak external magnetic field, a limit where a large nondecaying coherence factor is found. This feature is explained by Bose-Einstein-condensate-like physics which also allows us to argue that the corresponding zero frequency peak would not be broadened by statistical or ensemble averaging. DOI: 10.1103/PhysRevLett.110.040405