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arXiv 1209.1843quant-phphysics.optics
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光子中的量子态融合

Quantum state fusion in photons

Chiara Vitelli, Nicolò Spagnolo, Lorenzo Aparo, Fabio Sciarrino, Enrico Santamato, Lorenzo Marrucci

摘要:

光子是通信中量子信息的理想载体。每个光子可以有一个量子比特或甚至多个量子比特编码在其内部的量子态,如由光学自由度,如偏振,波长,横模等定义的。在这里,我们提出并实验证明了一个物理过程,名为"量子态融合",其中两个输入光子的二维量子态(量子比特)组合成一个单一的输出光子,在四维量子空间中。我们还提出了一个逆过程,即一个光子的四维量子态分裂成两个光子,每个光子携带一个量子比特。这两个过程都是可以迭代的,因此可以用来桥接量子信息的多粒子协议与多自由度协议,并可能在量子通信网络中应用。

英文摘要:

Photons are the ideal carriers of quantum information for communication. Each photon can have a single qubit or even multiple qubits encoded in its internal quantum state, as defined by optical degrees of freedom such as polarization, wavelength, transverse modes, etc. Here, we propose and experimentally demonstrate a physical process, named "quantum state fusion", in which the two-dimensional quantum states (qubits) of two input photons are combined into a single output photon, within a four-dimensional quantum space. The inverse process is also proposed, in which the four-dimensional quantum state of a single photon is split into two photons, each carrying a qubit. Both processes can be iterated, and hence may be used to bridge multi-particle protocols of quantum information with the multi-degree-of-freedom ones, with possible applications in quantum communication networks.

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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