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Analog information processing at the quantum limit with a Josephson ring modulator
Open accessAbstract
Amplifiers are crucial in every experiment carrying out a very sensitive measurement. However, they always degrade the information by adding noise. Quantum mechanics puts a limit on how small this degradation can be. Theoretically, the minimum noise energy added by a phase-preserving amplifier to the signal it processes amounts at least to half a photon at the signal frequency. Here we propose a practical microwave device that can fulfil the minimal requirements to reach the quantum limit. The availability of such a device is of importance for the readout of solid-state qubits, and more generally for the measurement of very weak signals in various areas of science. We discuss how this device can be the basic building block for a variety of practical applications, such as amplification, noiseless frequency conversion, dynamic cooling and production of entangled signal pairs. The minimum noise energy that a phase-preserving amplifier adds to the signal is fundamentally limited to half a photon. A proposed parametric amplifier based on Josephson junctions should be able to reach this limit at microwave frequencies.
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Citations
Cites
Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
Wallraff, A., Schuster, D. I., Blais, A., Frunzio, L., Huang, R. S., Majer, J., Kumar, S., Girvin, S. M., & Schoelkopf, R. J. (2004) · Nature · doi:10.1038/nature02851 · Cited by 3,796
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Cited by
Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets
Kandala, A., Mezzacapo, A., Temme, K., Takita, M., Brink, M., Chow, J. M., & Gambetta, J. M. (2017) · Nature · doi:10.1038/nature23879 · Cited by 2,982
Supervised learning with quantum-enhanced feature spaces
Havlíček, V., Córcoles, A. D., Temme, K., Harrow, A. W., Kandala, A., Chow, J. M., & Gambetta, J. M. (2019) · Nature · doi:10.1038/s41586-019-0980-2 · Cited by 2,572
Microwave photonics with superconducting quantum circuits
Gu, X., Kockum, A. F., Miranowicz, A., Liu, Y.-X., & Nori, F. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.10.002 · Cited by 1,307
Error mitigation extends the computational reach of a noisy quantum processor
Kandala, A., Temme, K., Córcoles, A. D., Mezzacapo, A., Chow, J. M., & Gambetta, J. M. (2019) · Nature · doi:10.1038/s41586-019-1040-7 · Cited by 871
Dynamically protected cat-qubits: a new paradigm for universal quantum computation
Mirrahimi, M., Leghtas, Z., Albert, V. V., Touzard, S., Schoelkopf, R. J., Jiang, L., & Devoret, M. H. (2014) · New Journal of Physics · doi:10.1088/1367-2630/16/4/045014 · Cited by 639
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Metadata
- Authors
- Bergeal, N., Vijay, R., Manucharyan, V. E., Siddiqi, I., Schoelkopf, R. J., Girvin, S. M., & Devoret, M. H.
- Venue
- Nature Physics
- Published
- 2010-02-14
- Volume
- 6
- Issue
- 4
- Pages
- 296-302
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W2044784037
- Cited by
- 228
- References
- 1
- FWCI
- 14.28
- Type
- journal article
- Language
- en
- Open access
- green
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- Bergeal, N., Vijay, R., Manucharyan, V. E., Siddiqi, I., Schoelkopf, R. J., Girvin, S. M., & Devoret, M. H. (2010). Analog information processing at the quantum limit with a Josephson ring modulator. Nature Physics. https://doi.org/10.1038/nphys1516
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