Scalable Neutral Atom Quantum Computer with Interaction on Demand: Proposal for Selective Application of Two-Qubit Gate
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概要
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We propose a scalable neutral atom quantum computer with an on-demand interaction through a selective two-qubit gate operation. Atoms are trapped by a lattice of near field Fresnel diffraction lights so that each trap captures a single atom. One-qubit gate operation is implemented by a gate control laser beam which is applied to an individual atom. Two-qubit gate operation between an arbitrary pair of atoms is implemented by sending these atoms to a state-dependent optical lattice and making them collide so that a particular two-qubit state acquires a dynamical phase. We give numerical evaluations corresponding to these processes, from which we estimate the upper bound of a two-qubit gate operation time and corresponding gate fidelity. Our proposal is feasible within currently available technology developed in cold atom gas, MEMS, nanolithography, and various areas in optics.
- 2011-11-15
著者
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Ohmi Tetsuo
Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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Nakahara Mikio
Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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Kondo Yasushi
Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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Lapasar Elham
Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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Kasamatsu Kenichi
Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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- Scalable Neutral Atom Quantum Computer with Interaction on Demand: Proposal for Selective Application of Two-Qubit Gate