通过动态去耦实现高保真量子门。

High fidelity quantum gates via dynamical decoupling.

机构信息

HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, USA.

出版信息

Phys Rev Lett. 2010 Dec 3;105(23):230503. doi: 10.1103/PhysRevLett.105.230503. Epub 2010 Dec 2.

DOI:10.1103/PhysRevLett.105.230503

Abstract

Realizing the theoretical promise of quantum computers will require overcoming decoherence. Here we demonstrate numerically that high fidelity quantum gates are possible within a framework of quantum dynamical decoupling. Orders of magnitude improvement in the fidelities of a universal set of quantum gates, relative to unprotected evolution, is achieved over a broad range of system-environment coupling strengths, using recursively constructed (concatenated) dynamical decoupling pulse sequences.

摘要

实现量子计算机的理论承诺需要克服退相干。在这里，我们通过量子动力学去耦的框架证明了高保真量子门是可能的。与无保护演化相比，通过递归构造（级联）动力学去耦脉冲序列，在广泛的系统-环境耦合强度范围内，一组通用量子门的保真度得到了数量级的提高。

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