%0 Journal Article
%J International Journal of Theoretical Physics
%D 2008
%T Efficient scheme for one-way quantum computing in thermal cavities
%A Wen-Xing Yang
%A Zhe-Xuan Gong
%X We propose a practical scheme for one-way quantum computing based on efficient generation of 2D cluster state in thermal cavities. We achieve a controlled-phase gate that is neither sensitive to cavity decay nor to thermal field by adding a strong classical field to the two-level atoms. We show that a 2D cluster state can be generated directly by making every two atoms collide in an array of cavities, with numerically calculated parameters and appropriate operation sequence that can be easily achieved in practical Cavity QED experiments. Based on a generated cluster state in Box$^{(4)}$ configuration, we then implement Grover's search algorithm for four database elements in a very simple way as an example of one-way quantum computing.
%B International Journal of Theoretical Physics
%V 47
%P 2997 - 3004
%8 2008/4/12
%G eng
%U http://arxiv.org/abs/0704.2297v1
%N 11
%! Int J Theor Phys
%R 10.1007/s10773-008-9734-x
%0 Journal Article
%J Journal of Physics B: Atomic, Molecular and Optical Physics
%D 2007
%T Practical scheme for quantum dense coding between three parties using microwave radiation in trapped ions
%A Wen-Xing Yang
%A Zhe-Xuan Gong
%X We propose a practical scheme for implementing two-dimension quantum dense coding (QDC) between three parties through manipulating three ions confined in microtraps addressed by microwaves and assisted by a magnetic field gradient. The ions in our scheme are not required to be strictly cooled to the vibrational ground state because single-qubit and multi-qubit operations are made via Ising terms, in which the vibrational modes of the ions remain unchanged throughout the scheme, rendering our scheme robust to the heating of the ions. We also present the detailed steps and parameters for implementing the three-party QDC experimentally and show that the proposed scheme is within the current techniques of ion-trap experiments.
%B Journal of Physics B: Atomic, Molecular and Optical Physics
%V 40
%P 1245 - 1252
%8 2007/03/28
%G eng
%U http://arxiv.org/abs/quant-ph/0702062v1
%N 6
%! J. Phys. B: At. Mol. Opt. Phys.
%R 10.1088/0953-4075/40/6/014
%0 Journal Article
%J Journal of Physics A: Mathematical and Theoretical
%D 2007
%T Simple scheme for implementing the Deutsch-Jozsa algorithm in thermal cavity
%A Wen-Xing Yang
%A Zhe-Xuan Gong
%X We present a simple scheme to implement the Deutsch-Jozsa algorithm based on two-atom interaction in a thermal cavity. The photon-number-dependent parts in the evolution operator are canceled with the strong resonant classical field added. As a result, our scheme is immune to thermal field, and does not require the cavity to remain in the vacuum state throughout the procedure. Besides, large detuning between the atoms and the cavity is not necessary neither, leading to potential speed up of quantum operation. Finally, we show by numerical simulation that the proposed scheme is equal to demonstrate the Deutsch-Jozsa algorithm with high fidelity.
%B Journal of Physics A: Mathematical and Theoretical
%V 40
%P 155 - 161
%8 2007/01/05
%G eng
%U http://arxiv.org/abs/quant-ph/0611225v2
%N 1
%! J. Phys. A: Math. Theor.
%R 10.1088/1751-8113/40/1/009