Generation of optical Schrödinger cat states in intense laser–matter interactions

TY - JOUR

T1 - Generation of optical Schrödinger cat states in intense laser–matter interactions

AU - Lewenstein, M.

AU - Ciappina, M. F.

AU - Pisanty, E.

AU - Rivera-Dean, J.

AU - Stammer, P.

AU - Lamprou, Th

AU - Tzallas, P.

N1 - Publisher Copyright: © 2021, The Author(s), under exclusive licence to Springer Nature Limited.

PY - 2021/10

Y1 - 2021/10

N2 - 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. The results open the path for investigations towards the control of the non-classical states, exploiting conditioning approaches on physical processes relevant to high-harmonic generation.

AB - 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. The results open the path for investigations towards the control of the non-classical states, exploiting conditioning approaches on physical processes relevant to high-harmonic generation.

UR - http://www.scopus.com/inward/record.url?scp=85110931964&partnerID=8YFLogxK

U2 - 10.1038/s41567-021-01317-w

DO - 10.1038/s41567-021-01317-w

M3 - 文章

AN - SCOPUS:85110931964

SN - 1745-2473

VL - 17

SP - 1104

EP - 1108

JO - Nature Physics

JF - Nature Physics

IS - 10

ER -