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Your search keyword '"Tian, Hui"' showing total 5 results
Start Over Author "Tian, Hui" Topic quantum entanglement
5 results on '"Tian, Hui"'

1. Hyperentanglement concentration of nonlocal two-photon six-qubit systems via the cross-Kerr nonlinearity

Author

Xiao-Min Zhang, Hong-Yang Ma, Qian Liu, Guo-Zhu Song, Tian-Hui Qiu, and Mei Zhang

Subjects
Physics, Bell state, Multidisciplinary, Quantum information, Science, Detector, Quantum entanglement, Quantum Physics, Polarization (waves), 01 natural sciences, Quantum mechanics, Article, 010305 fluids & plasmas, Nonlinear system, Qubit, 0103 physical sciences, Medicine, 010306 general physics, Quantum information science, Quantum
Abstract

We present an efficient hyperentanglement concentration protocol (hyper-ECP) for two-photon six-qubit systems in nonlocal partially hyperentangled Bell states with unknown parameters. In our scheme, we use two identical partially hyperentangled states which are simultaneously entangled in polarization and two different longitudinal momentum degrees of freedom (DOFs) to distill the maximally hyperentangled Bell state. The quantum nondemolition detectors based on the cross-Kerr nonlinearity are used to realize the parity checks of two-photon systems in three DOFs. The hyper-ECP can extract all the useful entanglement source, and the success probability can reach the theory limit with the help of iteration. All these advantages make our hyper-ECP useful in long-distance quantum communication in the future.

Published
2020

2. Deterministic Generation of W States for Any Number of Distant Atoms via Adiabatic Passage

Author

Tian-Hui Qiu and Guo-Jian Yang

Subjects
Physics, Dark state, Physics and Astronomy (miscellaneous), Computer simulation, General Mathematics, Cavity quantum electrodynamics, Physics::Optics, Spontaneous emission, Physics::Atomic Physics, Quantum entanglement, Atomic physics, W state, Adiabatic process
Abstract

We propose a deterministic scheme for preparing any number of distant atoms in a W state. The atoms are respectively trapped in spatially separated optical cavities connected by the fibers. Our scheme utilizes the adiabatic passage along dark state, and is robust against the atomic spontaneous emission and the decays of cavities. The numerical simulation of entanglement fidelity shows that the losses of fibers can be negligible under certain conditions. All of the advantages make the protocol more practical than previous ones.

Published
2013

3. Efficient Generation of Frequency-Multiplexed Entangled Single Photons.

Author

Qiu, Tian-Hui and Xie, Min

Subjects
*QUANTUM entanglement, *PHOTON beams, *QUANTUM theory, *PARTICLE dynamics analysis, *NUCLEAR physics
Abstract

We present two schemes to generate frequency-multiplexed entangled (FME) single photons by coherently mapping photonic entanglement into and out of a quantum memory based on Raman interactions. By splitting a single photon and performing subsequent state transfer, we separate the generation of entanglement and its frequency conversion, and find that the both progresses have the characteristic of inherent determinacy. Our theory can reproduce the prominent features of observed results including pulse shapes and the condition for deterministically generating the FME single photons. The schemes are suitable for the entangled photon pairs with a wider frequency range, and could be immune to the photon loss originating from cavity-mode damping, spontaneous emission, and the dephasing due to atomic thermal motion. The sources might have significant applications in wavelength-division-multiplexing quantum key distribution. [ABSTRACT FROM AUTHOR]

Published
2016
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4. Electromagnetically Induced Quantum Holographic Imaging.

Author

Qiu, Tian-Hui, Xie, Min, Ma, Hong-Yang, Zheng, Chun-Hong, and Chen, Li-Bo

Subjects
*HOLOGRAPHY, *ELECTROMAGNETIC devices, *DIFFRACTION gratings, *QUANTUM entanglement, *COMPUTER simulation, *PARAMETRIC downconversion
Abstract

We study the quantum holographic imaging of one-dimensional electromagnetically induced grating created by a strong standing wave in an atomic medium. Entangled photon pairs, generated in a spontaneous parametric down-conversion process, are employed as the imaging light to realize coincidence recording. By theoretical analysis and numerical simulation, we find that both the amplitude and phase information of the object can be imaged with the characteristic of imaging nonlocally and of arbitrarily controllable image variation in size. [ABSTRACT FROM AUTHOR]

Published
2016
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5. Deterministic Generation of W States for Any Number of Distant Atoms via Adiabatic Passage.

Author

Qiu, Tian-Hui and Yang, Guo-Jian

Subjects
*ADIABATIC quantum computation, *QUANTUM entanglement, *COMPUTER simulation, *ATOMIC emission spectroscopy, *DARK states (Quantum optics), *QUANTUM theory of the atom
Abstract

We propose a deterministic scheme for preparing any number of distant atoms in a W state. The atoms are respectively trapped in spatially separated optical cavities connected by the fibers. Our scheme utilizes the adiabatic passage along dark state, and is robust against the atomic spontaneous emission and the decays of cavities. The numerical simulation of entanglement fidelity shows that the losses of fibers can be negligible under certain conditions. All of the advantages make the protocol more practical than previous ones. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
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