Bilayer Quantum Hall System as a Macroscopic Qubit

Details Bilayer Quantum Hall System as a Macroscopic Qubit Bilayer Quantum Hall System as a Macroscopic Qubit

2001-05-02

arxiv.org/abs/cond-mat/0105027v4

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages

Scientific paper

In the bilayer quantum Hall system, a spontaneously charge imbalance state appears at the ground energy level. Gap in the collective excitation energy makes it stable against decoherence in macroscopic level. This state behaves as a spin 1/2 representation of SU(2) and can be controlled by applying the interlayer voltage. We suggest this system can be regarded as a macroscopic realization of a qubit for a quantum computer.

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