arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1805.04410quant-ph
收藏

大运算空间中的高维光量子逻辑

High-dimensional optical quantum logic in large operational spaces

Poolad Imany, Jose A. Jaramillo-Villegas, Mohammed S. Alshaykh, Joseph M. Lukens, Ogaga D. Odele, Alexandria J. Moore, Daniel E. Leaird, Minghao Qi, Andrew M. Weiner

摘要:

单光子源和光子-光子相互作用的概率性质鼓励在每个光子中编码尽可能多的量子信息以用于光子量子信息处理的目的。在这里,通过使用片上源在时间和频率自由度中编码高维信息单元(qudits),我们报告了在计算基础上具有超过0.90的quidities的单光子中的确定性双qudit门。构造了一个二量子模和门,产生并测量了一个时间量子和频率量子不可分离的单光子态。然后,我们对两个频率仓纠缠光子采用这种SUM操作,每个光子携带两个32维量子比特,以实现四方高维Greenberger-Horne-Zeilinger态,占据相当于20个量子比特的希尔伯特空间。虽然单独的高维编码最终无法扩展到通用量子计算,但我们的设计显示了在大编码空间中确定性光量子操作的潜力,用于实用和紧凑的量子信息处理协议。

英文摘要:

The probabilistic nature of single-photon sources and photon-photon interactions encourages encoding as much quantum information as possible in every photon for the purpose of photonic quantum information processing. Here, by encoding high-dimensional units of information (qudits) in time and frequency degrees of freedom using on-chip sources, we report deterministic two-qudit gates in a single photon with fidelities exceeding 0.90 in the computational basis. Constructing a two-qudit modulo SUM gate, we generate and measure a single-photon state with non-separability between time and frequency qudits. We then employ this SUM operation on two frequency-bin entangled photons, each carrying two 32-dimensional qudits, to realize a four-party high-dimensional Greenberger-Horne-Zeilinger state, occupying a Hilbert space equivalent to that of 20 qubits. Although high-dimensional coding alone is ultimately not scalable for universal quantum computing, our design shows the potential of deterministic optical quantum operations in large encoding spaces for practical and compact quantum information processing protocols.

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。

↑