DOE OSTI · 3376394
Vapor-cavity-QED system for quantum computation and communication
Abstract
In this work, we propose performing key operations in quantum computation and communication using room-temperature atoms moving across a grid of high-quality-factor, small-mode-volume cavities. These cavities enable high-cooperativity interactions with single atoms to be achieved with a characteristic timescale much shorter than the atomic transit time, allowing multiple coherent operations to take place. We study scenarios where we can drive a Raman transition to generate photons with specific temporal shapes and to absorb, and hence detect, single photons. The strong atom-cavity interaction can also be used to implement the atom-photon controlled-phase gate, which can then be used to construct photon-photon gates, create photonic cluster states, and perform nondemolition detection of single photons. We provide numerics validating our methods and discuss the implications of our results for several applications.
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Austin, Sharoon [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States)] (ORCID:0009000124234050), Devulapalli, Dhruv [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States)], Hoang, Khoi [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States); National Institute of Standards and Technology (NIST), Gaithersburg, MD (United States)] (ORCID:0009000919337141), Zhou, Feng [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States); National Institute of Standards and Technology (NIST), Gaithersburg, MD (United States)], Srinivasan, Kartik [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States); National Institute of Standards and Technology (NIST), Gaithersburg, MD (United States)] (ORCID:0000000325893688), Gorshkov, Alexey V. [National Institute of Standards and Technology (NIST), College Park, MD (United States). Joint Quantum Institute (JQI); Univ. of Maryland, College Park, MD (United States)] (ORCID:0000000305093421). 2026-04-28. Vapor-cavity-QED system for quantum computation and communication. https://doi.org/10.1103/fbz4-s3by
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