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Single-Shot Readout of Electron Spin States in a Quantum Dot Using Spin-Dependent Tunnel Rates
Open accessAbstract
We present a method for reading out the spin state of electrons in a quantum dot that is robust against charge noise and can be used even when the electron temperature exceeds the energy splitting between the states. The spin states are first correlated to different charge states using a spin dependence of the tunnel rates. A subsequent fast measurement of the charge on the dot then reveals the original spin state. We experimentally demonstrate the method by performing readout of the two-electron spin states, achieving a single-shot visibility of more than 80%. We find very long triplet-to-singlet relaxation times (up to several milliseconds), with a strong dependence on the in-plane magnetic field.
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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
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
Self-citationDriven coherent oscillations of a single electron spin in a quantum dot
Koppens, F. H. L., Buizert, C., Tielrooij, K. J., Vink, I. T., Nowack, K. C., Meunier, T., Kouwenhoven, L. P., & Vandersypen, L. M. K. (2006) · Nature · doi:10.1038/nature05065 · Cited by 1,359
Self-citationSpin qubits in graphene quantum dots
Trauzettel, B., Bulaev, D. V., Loss, D., & Burkard, G. (2007) · Nature Physics · doi:10.1038/nphys544 · Cited by 1,077
Single defect centres in diamond: A review
Jelezko, F., & Wrachtrup, J. (2006) · physica status solidi (a) · doi:10.1002/pssa.200671403 · Cited by 930
Quantum-Dot Spin-State Preparation with Near-Unity Fidelity
Atatüre, M., Dreiser, J., Badolato, A., Högele, A., Karrai, K., & Imamoglu, A. (2006) · Science · doi:10.1126/science.1126074 · Cited by 520
Metadata
- Authors
- Hanson, R., van Beveren, L. H. W., Vink, I. T., Elzerman, J. M., Naber, W. J. M., Koppens, F. H. L., Kouwenhoven, L. P., & Vandersypen, L. M. K.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2005-05-17
- Volume
- 94
- Issue
- 19
- Pages
- 196802-196802
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2104275208
- Cited by
- 325
- References
- 1
- FWCI
- 23.16
- Type
- journal article
- Language
- en
- Open access
- green
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- Hanson, R., van Beveren, L. H. W., Vink, I. T., Elzerman, J. M., Naber, W. J. M., Koppens, F. H. L., Kouwenhoven, L. P., & Vandersypen, L. M. K. (2005). Single-Shot Readout of Electron Spin States in a Quantum Dot Using Spin-Dependent Tunnel Rates. Physical Review Letters. https://doi.org/10.1103/physrevlett.94.196802
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