Detecting an Itinerant Optical Photon Twice without Destroying It
| Autor: | Lukas Hartung, Stephan Welte, Olivier Morin, Philip Thomas, Emanuele Distante, Stefan Langenfeld, Severin Daiss, Gerhard Rempe |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Quantum Physics Optical fiber Photon Orders of magnitude (temperature) business.industry Quantum sensor Cavity quantum electrodynamics FOS: Physical sciences General Physics and Astronomy 01 natural sciences law.invention Optics law 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Quantum information science business Quantum Quantum computer |
| Zdroj: | Physical Review Letters |
| Popis: | Nondestructive quantum measurements are central for quantum physics applications ranging from quantum sensing to quantum computing and quantum communication. Employing the toolbox of cavity quantum electrodynamics, we here concatenate two identical nondestructive photon detectors to repeatedly detect and track a single photon propagating through a $60\,\mathrm{m}$ long optical fiber. By demonstrating that the combined signal-to-noise ratio of the two detectors surpasses each single one by about two orders of magnitude, we experimentally verify a key practical benefit of cascaded non-demolition detectors compared to conventional absorbing devices. Comment: 8 pages, 6 figures |
| Databáze: | OpenAIRE |
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