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Generation of entanglement using a short-wavelength seeded free-electron laser

Nandi, Saikat LU ; Stenquist, Axel LU ; Papoulia, Asimina LU ; Olofsson, Edvin LU ; Badano, Laura ; Bertolino, Mattias LU orcid ; Busto, David LU orcid ; Callegari, Carlo ; Carlström, Stefanos LU and Danailov, Miltcho B , et al. (2024) In Science Advances 10(16). p.0668-0668
Abstract

Quantum entanglement between the degrees of freedom encountered in the classical world is challenging to observe due to the surrounding environment. To elucidate this issue, we investigate the entanglement generated over ultrafast timescales in a bipartite quantum system comprising two massive particles: a free-moving photoelectron, which expands to a mesoscopic length scale, and a light-dressed atomic ion, which represents a hybrid state of light and matter. Although the photoelectron spectra are measured classically, the entanglement allows us to reveal information about the dressed-state dynamics of the ion and the femtosecond extreme ultraviolet pulses delivered by a seeded free-electron laser. The observed generation of... (More)

Quantum entanglement between the degrees of freedom encountered in the classical world is challenging to observe due to the surrounding environment. To elucidate this issue, we investigate the entanglement generated over ultrafast timescales in a bipartite quantum system comprising two massive particles: a free-moving photoelectron, which expands to a mesoscopic length scale, and a light-dressed atomic ion, which represents a hybrid state of light and matter. Although the photoelectron spectra are measured classically, the entanglement allows us to reveal information about the dressed-state dynamics of the ion and the femtosecond extreme ultraviolet pulses delivered by a seeded free-electron laser. The observed generation of entanglement is interpreted using the time-dependent von Neumann entropy. Our results unveil the potential for using short-wavelength coherent light pulses from free-electron lasers to generate entangled photoelectron and ion systems for studying spooky action at a distance.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science Advances
volume
10
issue
16
pages
0668 - 0668
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • scopus:85190835142
  • pmid:38630815
ISSN
2375-2548
DOI
10.1126/sciadv.ado0668
language
English
LU publication?
yes
id
29eb9974-3e68-4198-833f-fe6850e1b19d
date added to LUP
2024-04-22 08:39:26
date last changed
2024-06-13 07:56:55
@article{29eb9974-3e68-4198-833f-fe6850e1b19d,
  abstract     = {{<p>Quantum entanglement between the degrees of freedom encountered in the classical world is challenging to observe due to the surrounding environment. To elucidate this issue, we investigate the entanglement generated over ultrafast timescales in a bipartite quantum system comprising two massive particles: a free-moving photoelectron, which expands to a mesoscopic length scale, and a light-dressed atomic ion, which represents a hybrid state of light and matter. Although the photoelectron spectra are measured classically, the entanglement allows us to reveal information about the dressed-state dynamics of the ion and the femtosecond extreme ultraviolet pulses delivered by a seeded free-electron laser. The observed generation of entanglement is interpreted using the time-dependent von Neumann entropy. Our results unveil the potential for using short-wavelength coherent light pulses from free-electron lasers to generate entangled photoelectron and ion systems for studying spooky action at a distance.</p>}},
  author       = {{Nandi, Saikat and Stenquist, Axel and Papoulia, Asimina and Olofsson, Edvin and Badano, Laura and Bertolino, Mattias and Busto, David and Callegari, Carlo and Carlström, Stefanos and Danailov, Miltcho B and Demekhin, Philipp V and Di Fraia, Michele and Eng-Johnsson, Per and Feifel, Raimund and Gallician, Guillaume and Giannessi, Luca and Gisselbrecht, Mathieu and Manfredda, Michele and Meyer, Michael and Miron, Catalin and Peschel, Jasper and Plekan, Oksana and Prince, Kevin C and Squibb, Richard J and Zangrando, Marco and Zapata Abellan, Felipe and Zhong, Shiyang and Dahlström, Jan Marcus}},
  issn         = {{2375-2548}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{16}},
  pages        = {{0668--0668}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Science Advances}},
  title        = {{Generation of entanglement using a short-wavelength seeded free-electron laser}},
  url          = {{http://dx.doi.org/10.1126/sciadv.ado0668}},
  doi          = {{10.1126/sciadv.ado0668}},
  volume       = {{10}},
  year         = {{2024}},
}