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Quantum oscillations in two coupled charge qubits
Open accessAbstract
A practical quantum computer, if built, would consist of a set of coupled two-level quantum systems (qubits). Among the variety of qubits implemented, solid-state qubits are of particular interest because of their potential suitability for integrated devices. A variety of qubits based on Josephson junctions have been implemented; these exploit the coherence of Cooper-pair tunnelling in the superconducting state. Despite apparent progress in the implementation of individual solid-state qubits, there have been no experimental reports of multiple qubit gates—a basic requirement for building a real quantum computer. Here we demonstrate a Josephson circuit consisting of two coupled charge qubits. Using a pulse technique, we coherently mix quantum states and observe quantum oscillations, the spectrum of which reflects interaction between the qubits. Our results demonstrate the feasibility of coupling multiple solid-state qubits, and indicate the existence of entangled two-qubit states.
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Citations
Cites
Quantum Computation and Quantum Information
Nielsen, M. A., Chuang, I., & Grover, L. K. (2002) · American Journal of Physics · doi:10.1119/1.1463744 · Cited by 21,895
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Houck, A. A., Türeci, H. E., & Koch, J. (2012) · Nature Physics · doi:10.1038/nphys2251 · Cited by 1,069
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Dowling, J. P., & Milburn, G. J. (2003) · Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences · doi:10.1098/rsta.2003.1227 · Cited by 1,046
Demonstration of an all-optical quantum controlled-NOT gate
O'Brien, J. L., Pryde, G. J., White, A. G., Ralph, T. C., & Branning, D. (2003) · Nature · doi:10.1038/nature02054 · Cited by 992
Decoherence in Josephson Qubits from Dielectric Loss
Martinis, J. M., Cooper, K. B., McDermott, R., Steffen, M., Ansmann, M., Osborn, K. D., Cicak, K., Oh, S., Pappas, D. P., Simmonds, R. W., et al. (2005) · Physical Review Letters · doi:10.1103/physrevlett.95.210503 · Cited by 838
Towards quantum chemistry on a quantum computer
Lanyon, B. P., Whitfield, J. D., Gillett, G. G., Goggin, M. E., Almeida, M. P., Kassal, I., Biamonte, J. D., Mohseni, M., Powell, B. J., Barbieri, M., et al. (2010) · Nature Chemistry · doi:10.1038/nchem.483 · Cited by 796
Metadata
- Authors
- Pashkin, Y. A., Yamamoto, T., Astafiev, O., Nakamura, Y., Averin, D. V., & Tsai, J. S.
- Venue
- Nature
- Published
- 2003-02
- Volume
- 421
- Issue
- 6925
- Pages
- 823-826
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2046251754
- Cited by
- 713
- References
- 1
- FWCI
- 102.83
- Type
- journal article
- Language
- en
- Open access
- green
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- Pashkin, Y. A., Yamamoto, T., Astafiev, O., Nakamura, Y., Averin, D. V., & Tsai, J. S. (2003). Quantum oscillations in two coupled charge qubits. Nature. https://doi.org/10.1038/nature01365
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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