dorsal/arxiv
View SchemaDecoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir
| Authors | L. Fedichkin, A. Fedorov |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0309024 |
| URL | https://arxiv.org/abs/quant-ph/0309024 |
| DOI | 10.1103/PhysRevA.69.032311 |
| Journal | Phys. Rev. A 69, 032311 (2004) |
Abstract
We analyze decoherence of an electron in a double-dot due to the interaction with acoustic phonons. For large tunneling rates between the quantum dots, the main contribution to decoherence comes from the phonon emission relaxation processes, while for small tunneling rates, the virtual-phonon, dephasing processes dominate. Our results show that in common semiconductors, such as Si and GaAs, the latter mechanism determines the upper limit for the double-dot charge qubit performance measure.
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"abstract": "We analyze decoherence of an electron in a double-dot due to the interaction\nwith acoustic phonons. For large tunneling rates between the quantum dots, the\nmain contribution to decoherence comes from the phonon emission relaxation\nprocesses, while for small tunneling rates, the virtual-phonon, dephasing\nprocesses dominate. Our results show that in common semiconductors, such as Si\nand GaAs, the latter mechanism determines the upper limit for the double-dot\ncharge qubit performance measure.",
"arxiv_id": "quant-ph/0309024",
"authors": [
"L. Fedichkin",
"A. Fedorov"
],
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"quant-ph",
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"doi": "10.1103/PhysRevA.69.032311",
"journal_ref": "Phys. Rev. A 69, 032311 (2004)",
"title": "Decoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir",
"url": "https://arxiv.org/abs/quant-ph/0309024"
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