Journal
OPTICS EXPRESS
Volume 27, Issue 13, Pages 17493-17506Publisher
Optica Publishing Group
DOI: 10.1364/OE.27.017493
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Funding
- National Natural Science Foundation of China [11747024, 51635011, 61571406, 61704158]
- Shanxi 1331 Project Key Subjects Construction
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The two or more degrees of freedoms (DOFs) of photon systems are very useful in hyperparallel photonic quantum computing to accomplish more quantum logic gate operations with less resource, and depress photonic dissipation noise in quantum information processing. We present some flexible and adjustable schemes for hybrid hyper-controlled-not (hyper-CNOT) gates assisted by low-Q cavities, on the two-photon systems in both the spatial-mode and the polarization DOFs. These hybrid spatial-polarization hyper-CNOT gates consume less quantum resource and are more robust against photonic dissipation noise, compared with the integration of two cascaded CNOT gates in one DOF. Besides, simultaneous counter-propagation of two photons economize extremely the operation time in the whole process of our schemes. Moreover, these quantum logic gates are more feasible for fast quantum operations in the weak-coupling region of the low-Q cavities with current experimental technology, which are much different from strong-coupling cases of the high-Q ones. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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