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States of an Ensemble of Two-Level Atoms with Reduced Quantum Uncertainty
Open accessAbstract
We generate entangled states of an ensemble of 5x10{4} 87Rb atoms by optical quantum nondemolition measurement. The resonator-enhanced measurement leaves the atomic ensemble, prepared in a superposition of hyperfine clock levels, in a squeezed spin state. By comparing the resulting reduction of quantum projection noise [up to 8.8(8) dB] with the concomitant reduction of coherence, we demonstrate a clock input state with spectroscopic sensitivity 3.0(8) dB beyond the standard quantum limit.
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Citations
Cites
Quantum information with continuous variables
Braunstein, S. L., & van Loock, P. (2005) · Reviews of Modern Physics · doi:10.1103/revmodphys.77.513 · Cited by 3,858
Takamoto, M., Hong, F.-L., Higashi, R., & Katori, H. (2005) · Nature · doi:10.1038/nature03541 · Cited by 853
Cited by
Degen, C. L., Reinhard, F., & Cappellaro, P. (2017) · Reviews of Modern Physics · doi:10.1103/revmodphys.89.035002 · Cited by 4,045
Atom-chip-based generation of entanglement for quantum metrology
Riedel, M. F., Böhi, P., Li, Y., Hänsch, T. W., Sinatra, A., & Treutlein, P. (2010) · Nature · doi:10.1038/nature08988 · Cited by 874
Entanglement Generated by Dissipation and Steady State Entanglement of Two Macroscopic Objects
Krauter, H., Muschik, C. A., Jensen, K., Wasilewski, W., Petersen, J. M., Cirac, J. I., & Polzik, E. S. (2011) · Physical Review Letters · doi:10.1103/physrevlett.107.080503 · Cited by 586
Quantum feedback: Theory, experiments, and applications
Zhang, J., Liu, Y.-X., Wu, R.-B., Jacobs, K., & Nori, F. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.02.003 · Cited by 272
Muniz, J. A., Young, D. J., Cline, J. R. K., & Thompson, J. K. (2021) · Physical Review Research · doi:10.1103/physrevresearch.3.023152 · Cited by 38
Metadata
- Authors
- Schleier-Smith, M. H., Leroux, I. D., & Vuletić, V.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2010-02-18
- Volume
- 104
- Issue
- 7
- Pages
- 073604-073604
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2050594526
- Cited by
- 333
- References
- 2
- FWCI
- 28.91
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Schleier-Smith, M. H., Leroux, I. D., & Vuletić, V. (2010). States of an Ensemble of Two-Level Atoms with Reduced Quantum Uncertainty. Physical Review Letters. https://doi.org/10.1103/physrevlett.104.073604
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