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Charge-Fluctuation-Induced Dephasing of Exchange-Coupled Spin Qubits
Open accessAbstract
Exchange-coupled spin qubits in semiconductor nanostructures are shown to be vulnerable to dephasing caused by charge noise invariably present in the semiconductor environment. This decoherence of exchange gate by environmental charge fluctuations arises from the fundamental Coulombic nature of the Heisenberg coupling and presents a serious challenge to the scalability of the widely studied exchange gate solid state spin quantum computer architectures. We estimate dephasing times for coupled spin qubits in a wide range (from 1 ns up to >1 micros) depending on the exchange coupling strength and its sensitivity to charge fluctuations.
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Citations
Cites
Quantum computation with quantum dots
Loss, D., & DiVincenzo, D. P. (1998) · Physical Review A · doi:10.1103/physreva.57.120 · Cited by 6,840
A silicon-based nuclear spin quantum computer
Kane, B. E. (1998) · Nature · doi:10.1038/30156 · Cited by 3,779
Cited by
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Hanson, R., Kouwenhoven, L. P., Petta, J. R., Tarucha, S., & Vandersypen, L. M. K. (2007) · Reviews of Modern Physics · doi:10.1103/revmodphys.79.1217 · Cited by 2,665
Coherent manipulation of single spins in semiconductors
Hanson, R., & Awschalom, D. D. (2008) · Nature · doi:10.1038/nature07129 · Cited by 503
Taylor, J. M., Engel, H.-A., Dür, W., Yacoby, A., Marcus, C. M., Zoller, P., & Lukin, M. D. (2005) · Nature Physics · doi:10.1038/nphys174 · Cited by 433
Quantum Coherence in a One-Electron Semiconductor Charge Qubit
Petersson, K. D., Petta, J. R., Lu, H., & Gossard, A. C. (2010) · Physical Review Letters · doi:10.1103/physrevlett.105.246804 · Cited by 379
Relaxation, dephasing, and quantum control of electron spins in double quantum dots
Taylor, J. M., Petta, J. R., Johnson, A. C., Yacoby, A., Marcus, C. M., & Lukin, M. D. (2007) · Physical Review B · doi:10.1103/physrevb.76.035315 · Cited by 356
Metadata
- Authors
- Hu, X., & Das Sarma, S.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2006-03-13
- Volume
- 96
- Issue
- 10
- Pages
- 100501-100501
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1983497176
- Cited by
- 185
- References
- 2
- FWCI
- 7.30
- Type
- journal article
- Language
- en
- Open access
- green
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- Hu, X., & Das Sarma, S. (2006). Charge-Fluctuation-Induced Dephasing of Exchange-Coupled Spin Qubits. Physical Review Letters. https://doi.org/10.1103/physrevlett.96.100501
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