Coherence protection in coupled quantum systems
Coherence protection in coupled quantum systems
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DOI：
10.1103/physreva.97.022103
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发表时间：
2016-09
影响因子：
2.9
通讯作者：
H. Cammack;P. Kirton;P. Eastham;Jonathan Keeling;B. Lovett
中科院分区：
文献类型：
--
作者：
H. Cammack;P. Kirton;P. Eastham;Jonathan Keeling;B. Lovett
量子系统与其环境的相互作用会导致退相干，这对量子信息处理的适用性设置了基本限制。然而，我们表明，如果该系统由不同的内部能量尺度的耦合部分，然后一个部分与热浴的相互作用不需要导致从其他的相干性损失。值得注意的是，我们发现，当与浴的耦合变得更强或温度升高时，受保护的部分可以保持更长时间的连贯性。我们的理论将使抗退相干混合量子计算机的设计成为可能。
The interaction of a quantum system with its environment causes decoherence, setting a fundamental limit on its suitability for quantum information processing. However, we show that if the system consists of coupled parts with different internal energy scales then the interaction of one part with a thermal bath need not lead to loss of coherence from the other. Remarkably, we find that the protected part can remain coherent for longer when the coupling to the bath becomes stronger or the temperature is raised. Our theory will enable the design of decoherence-resistant hybrid quantum computers.