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arXiv 1702.07299quant-ph
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高维单光子量子门:概念与实验

High-Dimensional Single-Photon Quantum Gates: Concepts and Experiments

Amin Babazadeh, Manuel Erhard, Feiran Wang, Mehul Malik, Rahman Nouroozi, Mario Krenn, Anton Zeilinger

摘要:

量子态的变换构成了每个量子信息系统的基本组成部分。从光子极化到二能级原子,各种量子比特系统的完整量子门是众所周知的。对于量子比特之外的多能级量子系统,情况更具挑战性。光子的轨道角动量模式包括一个这样的高维系统,其产生和测量技术得到了很好的研究。然而,这种量子态的任意变换是未知的。在这里,我们实验证明了一个四维广义的泡利X门和它的所有整数功率的单光子携带轨道角动量。与著名的Z门一起,这形成了第一套完整的实验实现的高维量子门。X门的概念是基于对具有不同宇称的量子态的独立访问,因此可以很容易地推广到其他光子自由度,以及其他量子系统,如离子和超导电路。

英文摘要:

Transformations on quantum states form a basic building block of every quantum information system. From photonic polarization to two-level atoms, complete sets of quantum gates for a variety of qubit systems are well known. For multi-level quantum systems beyond qubits, the situation is more challenging. The orbital angular momentum modes of photons comprise one such high-dimensional system for which generation and measurement techniques are well-studied. However, arbitrary transformations for such quantum states are not known. Here we experimentally demonstrate a four-dimensional generalization of the Pauli X-gate and all of its integer powers on single photons carrying orbital angular momentum. Together with the well-known Z-gate, this forms the first complete set of high-dimensional quantum gates implemented experimentally. The concept of the X-gate is based on independent access to quantum states with different parities and can thus be easily generalized to other photonic degrees-of-freedom, as well as to other quantum systems such as ions and superconducting circuits.

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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