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Entanglement of orbital angular momentum in non-sequential double ionization

Author

Listed:
  • Andrew S. Maxwell

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    Aarhus University)

  • Lars Bojer Madsen

    (Aarhus University)

  • Maciej Lewenstein

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA)

Abstract

Entanglement has a capacity to enhance imaging procedures, but this remains unexplored for attosecond imaging. Here, we elucidate that possibility, addressing orbital angular momentum (OAM) entanglement in ultrafast processes. In the correlated process non-sequential double ionization (NSDI) we demonstrate robust photoelectron entanglement. In contrast to commonly considered continuous variables, the discrete OAM allows for a simpler interpretation, computation, and measurement of entanglement. The logarithmic negativity reveals that the entanglement is robust to incoherence and an entanglement witness minimizes the number of measurements to detect the entanglement, both quantities are related to OAM coherence terms. We quantify the entanglement for a range of targets and field parameters to find the most entangled photoelectron pairs. This methodology provides a general way to use OAM to quantify and measure entanglement, well-suited to attosecond processes, and can be exploited to enhance imaging capabilities through correlated measurements, or for generation of OAM-entangled electrons.

Suggested Citation

  • Andrew S. Maxwell & Lars Bojer Madsen & Maciej Lewenstein, 2022. "Entanglement of orbital angular momentum in non-sequential double ionization," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32128-z
    DOI: 10.1038/s41467-022-32128-z
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    References listed on IDEAS

    as
    1. Hiromichi Niikura & F. Légaré & R. Hasbani & A. D. Bandrauk & Misha Yu. Ivanov & D. M. Villeneuve & P. B. Corkum, 2002. "Sub-laser-cycle electron pulses for probing molecular dynamics," Nature, Nature, vol. 417(6892), pages 917-922, June.
    2. J. Itatani & J. Levesque & D. Zeidler & Hiromichi Niikura & H. Pépin & J. C. Kieffer & P. B. Corkum & D. M. Villeneuve, 2004. "Tomographic imaging of molecular orbitals," Nature, Nature, vol. 432(7019), pages 867-871, December.
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