Publikation: Universal quantum computing with correlated spin-charge states
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2007
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Kyriakidis, Jordan
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Physical Review. 2007(B75), 115324. Available under: doi: 10.1103/PhysRevB.75.115324
Zusammenfassung
We propose a universal quantum computing scheme in which the orthogonal qubit states |0i and |1> are identical in their single-particle spin and charge properties. Each qubit is contained in a single quantum dot and gate operations are induced all-electrically by changes in the confinement potential. Within the computational space, these qubits are robust against environmental influences that couple to the system through single-particle channels. Due to the identical spin and charge properties of the |0>, |1> states, the lowest-order relaxation and decoherence rates 1/T1 and 1/T2, within the Born-Markov approximation, both vanish for a large class of environmental couplings. We give explicit pulse sequences for a universal set of gates (phase, phi/8, Hadamard, cnot) and discuss state preparation, manipulation, and detection.
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KYRIAKIDIS, Jordan, Guido BURKARD, 2007. Universal quantum computing with correlated spin-charge states. In: Physical Review. 2007(B75), 115324. Available under: doi: 10.1103/PhysRevB.75.115324BibTex
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year={2007},
doi={10.1103/PhysRevB.75.115324},
title={Universal quantum computing with correlated spin-charge states},
number={B75},
journal={Physical Review},
author={Kyriakidis, Jordan and Burkard, Guido},
note={Article Number: 115324}
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<dcterms:abstract xml:lang="eng">We propose a universal quantum computing scheme in which the orthogonal qubit states |0i and |1> are identical in their single-particle spin and charge properties. Each qubit is contained in a single quantum dot and gate operations are induced all-electrically by changes in the confinement potential. Within the computational space, these qubits are robust against environmental influences that couple to the system through single-particle channels. Due to the identical spin and charge properties of the |0>, |1> states, the lowest-order relaxation and decoherence rates 1/T1 and 1/T2, within the Born-Markov approximation, both vanish for a large class of environmental couplings. We give explicit pulse sequences for a universal set of gates (phase, phi/8, Hadamard, cnot) and discuss state preparation, manipulation, and detection.</dcterms:abstract>
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