Nonadiabatic Holonomic Quantum Computation in Decoherence-Free Subspaces
Nonadiabatic Holonomic Quantum Computation in Decoherence-Free Subspaces
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DOI：
10.1103/physrevlett.109.170501
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发表时间：
2012-10-24
影响因子：
8.6
通讯作者：
Kwek, L. C.
中科院分区：
文献类型：
--
作者：
Xu, G. F.;Zhang, J.;Kwek, L. C.
量子计算结合了消相干子空间的相干稳定性和几何完整控制的容错性，具有重要的实际意义。近年来，人们提出了一些在无退相干子空间中进行绝热完整量子计算的方案。然而，在无退相干子空间中的非绝热完整量子计算，它避免了长时间的运行要求，但所有的鲁棒性的优点，仍然是一个开放的问题。在这里，我们演示了如何实现非绝热完整量子计算的消相干自由子空间。通过仅使用三个相邻的物理量子比特进行集体退相来编码一个逻辑量子比特，我们实现了一组通用的量子门。
Quantum computation that combines the coherence stabilization virtues of decoherence-free subspaces and the fault tolerance of geometric holonomic control is of great practical importance. Some schemes of adiabatic holonomic quantum computation in decoherence-free subspaces have been proposed in the past few years. However, nonadiabatic holonomic quantum computation in decoherence-free subspaces, which avoids a long run-time requirement but with all the robust advantages, remains an open problem. Here, we demonstrate how to realize nonadiabatic holonomic quantum computation in decoherence-free subspaces. By using only three neighboring physical qubits undergoing collective dephasing to encode one logical qubit, we realize a universal set of quantum gates.