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12 papers · 2 filters
Controlling quantum state transfer in spin chain with the confined field
Bing Chen, Z. Song, C. P. Sun
As a demonstration of the spectrum-parity matching condition (SPMC) for quantum state transfer, we investigate the propagation of single-magnon state in the Heisenberg chain in the…
Quantum Nonlocality of N-qubit W states
Chunfeng Wu, Jing-Ling Chen, L. C. Kwek +1
An experimental setup for testing quantum nonlocality of N qubits is proposed. This method is a generalization of the optical setup proposed by Banaszek and Wodkiewicz [1]. The qua…
Possibility of Inhomogeneous Coupling Leading to Decoherence in an Electromagnetically-Induced-Transparency Quantum-Memory Process
Xiong-Jun Liu, Zheng-Xin Liu, Xin Liu +1
The effect of inhomogeneous coupling between three-level atoms and external light fields is studied in the electromagnetically induced transparency (EIT) quantum memory techqnique.…
Quantum state swapping via qubit network with Hubbard interaction
S. Yang, Z. Song, C. P. Sun
We study the quantum state transfer (QST) in a class of qubit network with on-site interaction, which is described by the generalized Hubbard model with engineered couplings. It is…
Beam Splitter for Spin Waves in Quantum Spin Network
S. Yang, Z. Song, C. P. Sun
We theoretically design and analytically study a controllable beam splitter for the spin wave propagating in a star-shaped (e.g., a -shaped beam) spin network. Such a solid stat…
Decay of Loschmidt Echo Enhanced by Quantum Criticality
H. T. Quan, Z. Song, X. F. Liu +2
We study the transition of a quantum system from a pure state to a mixed one, which is induced by the quantum criticality of the surrounding system coupled to it. To chara…