Invited Orbital quantum bits based on the inter-valley interactions in Si quantum dots (先端デバイスの基礎と応用に関するアジアワークショップ(AWAD2005))

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概要

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• In this paper, current status of experimental and theoretical work on quantum bits based on the semiconductor quantum dots in the University of Seoul will be presented. A new proposal utilizing the multi-valley quantum state transitions in a Si quantum dot as a possible candidate for a quantum bit with a long decoherence time will be also given. Qubits are the multi-valley symmetric and anti-symmetric orbitals. Evolution of these orbitals is controlled by an external electric field, which turns on and off the inter-valley interactions. Initialization is achieved by turning on the inter-valley Hamiltonian to let the system settle down to the symmetric orbital state. Estimates of the decoherence time is made for the longitudinal acoustic phonon process.

• 一般社団法人電子情報通信学会の論文
• 2005-06-23

著者

• HWANG S.

  Institute of Quantum Information Processing and Systems, University of Seoul

• Hwang S.

  Institute Of Quantum Information Processing And Systems University Of Seoul:department Of Electronic

• Ahn D.

  Institute Of Quantum Information Processing And Systems University Of Seoul

• Hwang S.

  Institute Of Quantum Information Processing And Systems University Of Seoul:department Of Electronic Engineering Korea University

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