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11 Result(s)

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  1. No Access

    Article

    Geometric Phase of Time-Dependent Superconducting Qubit

    Geometric phases are studied in terms of invariant operator for a time-dependent superconducting qubit. The results show that the geometric phase depends on the dipole interaction strength between the qubit an...

    G. R. Zeng, Yanyan Jiang, Z. Q. Chen… in International Journal of Theoretical Physi… (2015)

  2. No Access

    Article

    Entanglement Dynamics and its Application for Two Qubits in Dissipative Environment

    An entanglement dynamics of two dissipative qubits under different situation of initial conditions is studied. We find that the periodic disentanglement and entanglement results from the interaction between tw...

    Z. Q. Chen, X. G. Yu, Guolan Fu, Hualan Xu… in International Journal of Theoretical Physi… (2015)

  3. No Access

    Article

    Fidelity and Entanglement with Environment Effect

    A quantum entangling gate is investigated in dissipative system by considering input initial entangled two qubits. By analyzing the relation between the fidelity and the concurrence, we find that the fidelity ...

    Guolan Fu, Z. Q. Chen, Huangyun Rao… in International Journal of Theoretical Physi… (2014)

  4. No Access

    Article

    Broadband and ultra-thin terahertz metamaterial absorber based on multi-circular patches

    An ultra-thin narrow-band metamaterial absorber (MA) based on a periodic array of circular metal patch is numerically proposed at terahertz frequencies. The MA could exhibit an absorption peak at 5.91 THz with...

    G. D. Wang, M. H. Liu, X. W. Hu, L. H. Kong, L. L. Cheng… in The European Physical Journal B (2013)

  5. No Access

    Article

    Entangled Subspaces for Two Coupled Qubits in a Normal Environment

    By investigating the effect of environmental perturbations on two initially coupled qubits, we find that the interactions between the qubits and between the qubits and the environment are not only the source o...

    Z. Q. Chen, Li** Guo, Z. S. Wang in International Journal of Theoretical Physics (2012)

  6. No Access

    Article

    Geometric Phase for Optical Free Induction Decay

    Geometric phase is investigated for optical free induction decay with a modified Bloch equation by establishing in connecting density matrices with nonunit vector ray in a complex projective Hilbert space. Und...

    Yanxia Yu, Z. Q. Chen, Li-yun Hu… in International Journal of Theoretical Physi… (2011)

  7. No Access

    Article

    Geometric Population Inversion in Rabi Oscillation

    The relations between geometric phases and population inversion in Rabi oscillation are investigated for all possible cases. The results show that the population inverse is an elliptically symmetric distributi...

    Dongyu Liu, Z. Q. Chen, Z. S. Wang in International Journal of Theoretical Physics (2010)

  8. No Access

    Article

    Controlling Decoherence from Fluctuating Magnetic Field

    A different strategy is proposed to control decoherence from fluctuating magnetic field by adjusting external controllable parameters. The results show that the output states in terms of the fidelity are pure ...

    Z. Q. Chen, L. P. Guo, Y. Chen, X. L. Li… in International Journal of Theoretical Physi… (2010)

  9. No Access

    Article

    Avoiding Loss of Fidelity for Universal Entangling Geometric Quantum Gate

    A strategy to perfectly preserve the two-qubit state is investigated in geometric quantum computation for nuclear magnetic resonance system. The results show that, by controlling the azimuthal angle in the ini...

    Z. Q. Chen, J. Q. Wang, X. L. Li, Y. H. Ji… in International Journal of Theoretical Physi… (2009)

  10. No Access

    Article

    8.1 W/670.7 nm and 5.1 W/669.6 nm cw red light outputs by intracavity frequency doubling of a Nd:YAP laser with LBO

    In this paper, the continuous-wave intracavity second harmonic generation of a laser diode side-pumped Nd:YAP laser operating in the 1.3-μm region is demonstrated. A type-I critical phase-matched LiB3O5 (LBO) cry...

    H.Y. Zhu, G. Zhang, C.H. Huang, Y. Wei, L.X. Huang, Z.Q. Chen in Applied Physics B (2008)

  11. No Access

    Article

    1318.8 nm/1338.2 nm simultaneous dual-wavelength Q-switched Nd:YAG laser

    A diode-side-pumped simultaneous dual-wavelength Q-switched Nd:YAG laser around 1.3 μm is demonstrated. With the pum** power of 480 W, a peak power of 43 kW was obtained at the repetition rate of 5 kHz. The ...

    H.Y. Zhu, G. Zhang, C.H. Huang, Y. Wei, L.X. Huang, A.H. Li, Z.Q. Chen in Applied Physics B (2008)