Generation of optical Schrödinger cat states in intense laser–matter interactions
By Maciej Lewenstein, M. Ciappina, E. Pisanty, J. Rivera-Dean, P. Stammer, Th. Lamprou, P. Tzallas. Nature Physics, 2020
148 citations recorded by the source corpus.
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. Schrödinger cat states are observed in intense laser–atom interactions. These are a superposition of the initial state of the laser and the coherent state that results from the interaction between the light and atoms.
Subfields: Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/44fbda46593f4d681a8bb9c19aefe7a0b0f54707
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- High-harmonic generation driven by quantum light (2022, result): “However, it is conventional HHG and shown in previous works 36,38,40 .”