Khodjasteh Kaveh, Viola Lorenza
Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, New Hampshire 03755, USA.
Phys Rev Lett. 2009 Feb 27;102(8):080501. doi: 10.1103/PhysRevLett.102.080501. Epub 2009 Feb 26.
Scalable quantum computation in realistic devices requires that precise control can be implemented efficiently in the presence of decoherence and operational errors. We propose a general constructive procedure for designing robust unitary gates on an open quantum system without encoding or measurement overhead. Our results allow for a low-level error correction strategy solely based on Hamiltonian engineering using realistic bounded-strength controls and may substantially reduce implementation requirements for fault-tolerant quantum computing architectures.
在实际设备中实现可扩展量子计算需要在存在退相干和操作误差的情况下高效地实现精确控制。我们提出了一种通用的构造性方法，用于在开放量子系统上设计鲁棒的酉门，而无需编码或测量开销。我们的结果允许仅基于使用实际有界强度控制的哈密顿量工程的低级纠错策略，并且可能大幅降低容错量子计算架构的实现要求。
