dorsal/arxiv
View SchemaDecoherence and Programmable Quantum Computation
| Authors | Jeff P. Barnes, Warren S. Warren |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9902084 |
| URL | https://arxiv.org/abs/quant-ph/9902084 |
| DOI | 10.1103/PhysRevA.60.4363 |
Abstract
An examination of the concept of using classical degrees of freedom to drive the evolution of quantum computers is given. Specifically, when externally generated, coherent states of the electromagnetic field are used to drive transitions within the qubit system, a decoherence results due to the back reaction from the qubits onto the quantum field. We derive an expression for the decoherence rate for two cases, that of the single-qubit Walsh-Hadamard transform, and for an implementation of the controlled-NOT gate. We examine the impact of this decoherence mechanism on Grover's search algorithm, and on the proposals for use of error-correcting codes in quantum computation.
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"abstract": "An examination of the concept of using classical degrees of freedom to drive\nthe evolution of quantum computers is given. Specifically, when externally\ngenerated, coherent states of the electromagnetic field are used to drive\ntransitions within the qubit system, a decoherence results due to the back\nreaction from the qubits onto the quantum field. We derive an expression for\nthe decoherence rate for two cases, that of the single-qubit Walsh-Hadamard\ntransform, and for an implementation of the controlled-NOT gate. We examine the\nimpact of this decoherence mechanism on Grover\u0027s search algorithm, and on the\nproposals for use of error-correcting codes in quantum computation.",
"arxiv_id": "quant-ph/9902084",
"authors": [
"Jeff P. Barnes",
"Warren S. Warren"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevA.60.4363",
"title": "Decoherence and Programmable Quantum Computation",
"url": "https://arxiv.org/abs/quant-ph/9902084"
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