| Autor: |
Ronen M. Kroeze, Brendan P. Marsh, Kuan-Yu Lin, Jonathan Keeling, Benjamin L. Lev |
| Přispěvatelé: |
University of St Andrews. School of Physics and Astronomy, University of St Andrews. Centre for Designer Quantum Materials, University of St Andrews. Condensed Matter Physics |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
Funding: The authors acknowledge funding support from the Army Research Office, NTT Research, and the QNEXT DOE National Quantum Information Science Research Center. B.M. acknowledges funding from the Q-NEXT DOE National Quantum Information Science Research Center and the NSF Graduate Research Fellowship. Cavity quantum electrodynamics (QED) with cooperativity far greater than unity enables high-fidelity quantum sensing and information processing. The high-cooperativity regime is often reached through the use of short single-mode resonators. More complicated multimode resonators, such as the near-confocal optical Fabry-Prot cavity, can provide intracavity atomic imaging in addition to high cooperativity. This capability has recently proved important for exploring quantum many-body physics in the driven-dissipative setting. In this work, we show that a confocal-cavity–QED microscope can realize cooperativity in excess of 110. This cooperativity is on par with the very best single-mode cavities (which are far shorter) and 21 times greater than single-mode resonators of similar length and mirror radii. The 1.7-μm imaging resolution is naturally identical to the photon-mediated interaction range. We measure these quantities by determining the threshold of cavity superradiance when small optically tweezed Bose-Einstein condensates are pumped at various intracavity locations. Transmission measurements of an ex situ cavity corroborate these results. We provide a theoretical description that shows how cooperativity enhancement arises from the dispersive coupling to the atoms of many near-degenerate modes. Publisher PDF |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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