Unconventional geometric quantum computation with quantum-dot spin qubits inside a cavity

Abstract

Abstract:

A scheme for realizing unconventional geometric quantum logical gates with quantum dots in a microcavity, via double channels Raman interactions, is introduced. In the scheme, all of the operations are independent on the state of cavity mode, and thus insensitive to the thermal cavity field states. The total accumulate phase includes both geometric and dynamic phases, but it still depends only on global features of the process. The required quantum gates can be obtained by adjusting coupling constant and detunings. They are relatively easy in implementation by waive the needs of eliminating dynamic phases, and can reach higher fidelity by avoiding the additional errors in the process of eliminating dynamic phases.

Key words: geometric quantum computation, quantum dot, Raman interaction

ZHANG Gang, DONG Ping. Unconventional geometric quantum computation with quantum-dot spin qubits inside a cavity[J]. J4, 2009, 26(4): 431-436.

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