Project supported by the National Natural Science Foundation of China (Grant No. 60667001)
We investigate the entanglement dynamics via the concurrence of two distant atoms interacting off-resonantly with two cavity fields in Fock states, respectively. We find that the evolution of entanglement has sudden d...
supported by the National Natural Science Foundation of China (Grant No.60667001)
This paper studies the average fidelity of teleportation and thermal entanglement for a two-qubit Heisenberg XYZ chain in the presence of both an inhomogeneous magnetic field and a Dzyaloshinski-Moriya interaction. It...
supported by the National Natural Science Foundation of China (Grant No.60667001)
This paper shows that a proposal for implementing all possible two-operator positive-operator-value measurements of single spin qubit can be obtained via introducing another spin qubit as ancilla. The realization proc...
Project supported by the National Natural Science Foundation of China (Grant No 60667001)
We present a scheme for implementing a three-qubit phase gate via manipulating rf superconducting quantum interference device (SQUID) qubits in the decoherence-free subspace with respect to cavity decay. Through app...
Project supported by the National Natural Science Foundation of China (Grant No 60667001);the Science Foundation of Yanbian University,China (Grant No 2007-35)
This paper proposes a scheme to generate arbitrary four-atom entangled decoherence-free states by using simple linear optical elements, four one-sided cavities in which four atoms are confined respectively. By conveni...
Project supported by the National Natural Science Foundation of China (Grant No 60667001);the Education Foundation of Yanbian University of China
We examine the entanglement dynamics between two strongly driven atoms off-resonantly coupled with a singlemode cavity via the two-photon process with the help of negativity in two different types of initial states. T...
Project supported by the National Natural Science Foundation of China (Grant No 60667001);the Science Foundation of Yanbian University, China (Grant No 2007-31)
A scheme for approximate generation of an N-qubit phase gate is proposed in cavity QED based on nonidentical coupling between the atoms and the cavity. The atoms interact with a highly detuned cavity-field mode, but q...
supported by the National Natural Science Foundation of China (Grant No 60667001);the Science Foundation of Yanbian University,China (Grant No 2007-35)
This paper proposes a scheme to generate a new x-type four-atom entangled state for the first time by using linear optics elements, four one-sided cavities (one three-level atom) and a conventional photon detector. ...