arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.2690quant-ph
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绝热拓扑量子计算

Adiabatic topological quantum computing

Chris Cesare, Andrew J. Landahl, Dave Bacon, Steven T. Flammia, Alice Neels

摘要:

拓扑量子计算保证了无需主动纠错的抗错量子计算。然而,人们担心,在通过将任意子编织在彼此周围来执行量子门的过程中,会产生额外的任意子激发,这将使编码的量子信息混乱。在这里,我们探讨这个问题的详细研究绝热代码变形的基础上的拓扑代码,特别是Kitaev的表面码和最近发现的颜色代码的哈密顿。我们开发的协议,使通用的量子计算的绝热演化的方式,保持系统的能隙恒定相对于计算大小,只引入简单的本地哈密顿相互作用。这使得人们可以用这些拓扑量子计算系统来执行完整的量子计算。我们开发的工具允许人们超越数值模拟,并分析理解这些过程。

英文摘要:

Topological quantum computing promises error-resistant quantum computation without active error correction. However, there is a worry that during the process of executing quantum gates by braiding anyons around each other, extra anyonic excitations will be created that will disorder the encoded quantum information. Here we explore this question in detail by studying adiabatic code deformations on Hamiltonians based on topological codes, notably Kitaev's surface codes and the more recently discovered color codes. We develop protocols that enable universal quantum computing by adiabatic evolution in a way that keeps the energy gap of the system constant with respect to the computation size and introduces only simple local Hamiltonian interactions. This allows one to perform holonomic quantum computing with these topological quantum computing systems. The tools we develop allow one to go beyond numerical simulations and understand these processes analytically.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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