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P. Xue

Publications and source records attributed to P. Xue.

5 recordsLinked to original sources
arXiv2014

Trapping photons on the line: controllable dynamics of a quantum walk

We demonstrate a coined quantum walk over ten steps in a one-dimensional network of linear optical elements. By applying single-point phase defects, the translational symmetry of an ideal standard quantum walk is broken resulting in localization effect in a quantum walk architecture. We furthermore investigate how the level of phase due to single-point phase defects and coin settings influence the strength of the localization signature.

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arXiv2011

Universal quantum computing with nanowire double quantum dots

We show a method for implementing universal quantum computing using of a singlet and triplets of nanowire double quantum dots coupled to a one-dimensional transmission line resonator. This method is attractive for both quantum computing and quantum control with inhibition of spontaneous emission, enhanced spin qubit lifetime, strong coupling and quantum nondemolition measurements of spin qubits. We analyze the performance and stability of all required operations and emphasize that all techniques are feasible with current experimental technology.

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arXiv2008

Bipartite entanglement purification with neutral atoms

We theoretically study bipartite entanglement purification with neutral atoms via cavity-assistant interaction and linear optical elements. We focus on entanglement distillation and the recurrence protocol, whose performances under idealized and realistic conditions are discussed. The implementation of these purification protocols has been tested with numerical simulations. We analyze the performance and stability of all required operations and emphasize that all techniques are feasible with current experimental technology.

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arXiv2006

Universal quantum computation in deocoherence-free subspace with neutral atoms

We show how realistic cavity-assisted interaction between neutral atoms and coherent optical pulses, and measurement techniques, combined with optical transportation of atoms, allow for a universal set of quantum gates acting on decoherence-free subspace (DFS) in deterministic way. The logical qubits are immunized to the dominant source of decoherece--dephasing; while, the influences of additional errors are shown by numerical simulations. We analyze the performance and stability of all required operations and emphasize that all techniques we use are feasible with current experimental technology.

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