dorsal/arxiv
View SchemaNoisy Control, the Adiabatic Geometric Phase, and Destruction of the Efficiency of Geometric Quantum Computation
| Authors | Frank Gaitan |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0312008 |
| URL | https://arxiv.org/abs/quant-ph/0312008 |
Abstract
We examine the adiabatic dynamics of a quantum system coupled to a noisy classical control field. A stochastic phase shift is shown to arise in the off-diagonal elements of the system's density matrix which can cause decoherence. We derive the condition for onset of decoherence, and identify the noise properties that drive decoherence. We show how this decoherence mechansim causes: (1) a dephasing of the observable consequences of the adiabatic geometric phase; and (2) the loss of computational efficiency of the Shor algorithm when run on a sufficiently noisy geometric quantum computer.
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"abstract": "We examine the adiabatic dynamics of a quantum system coupled to a noisy\nclassical control field. A stochastic phase shift is shown to arise in the\noff-diagonal elements of the system\u0027s density matrix which can cause\ndecoherence. We derive the condition for onset of decoherence, and identify the\nnoise properties that drive decoherence. We show how this decoherence mechansim\ncauses: (1) a dephasing of the observable consequences of the adiabatic\ngeometric phase; and (2) the loss of computational efficiency of the Shor\nalgorithm when run on a sufficiently noisy geometric quantum computer.",
"arxiv_id": "quant-ph/0312008",
"authors": [
"Frank Gaitan"
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"quant-ph"
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"title": "Noisy Control, the Adiabatic Geometric Phase, and Destruction of the Efficiency of Geometric Quantum Computation",
"url": "https://arxiv.org/abs/quant-ph/0312008"
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