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Generation of optical Schrödinger cat states in intense laser–matter interactions
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SYSNO ASEP 0554118 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Generation of optical Schrödinger cat states in intense laser–matter interactions Author(s) Lewenstein, M. (ES)
Ciappina, Marcelo F. (FZU-D) ORCID
Pisanty, E. (ES)
Rivera-Dean, J. (ES)
Stammer, P. (ES)
Lamprou, T. (GR)
Tzallas, P. (GR)Number of authors 7 Source Title Nature Physics. - : Nature Publishing Group - ISSN 1745-2473
Roč. 17, OCT (2021), s. 1104-1108Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords non-classical light states ; high-intensity laser-matter interaction Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GC20-24805J GA ČR - Czech Science Foundation (CSF) Research Infrastructure ELI Beamlines III - 90141 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000686522600002 EID SCOPUS 85110931964 DOI 10.1038/s41567-021-01317-w Annotation The physics of intense laser–matter interactions1,2 is described by treating the light pulses classically, anticipating no need to access optical measurements beyond the classical limit. However, the quantum nature of the electromagnetic fields is always present3. Here we demonstrate that intense laser–atom interactions may lead to the generation of highly non-classical light states. This was achieved by using the process of high-harmonic generation in atoms4,5, in which the photons of a driving laser pulse of infrared frequency are upconverted into photons of higher frequencies in the extreme ultraviolet spectral range. The quantum state of the fundamental mode after the interaction, when conditioned on the high-harmonic generation, is a so-called Schrödinger cat state, which corresponds to a superposition of two distinct coherent states: the initial state of the laser and the coherent state reduced in amplitude that results from the interaction with atoms. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1038/s41567-021-01317-w
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