Single photon pulse induced transient entanglement force

We show that a single photon pulse incident on two interacting two-level atoms induces a transient entanglement force between them. After absorption of a multi-mode Fock state pulse, the time-dependent atomic interaction mediated by the vacuum fluctuations changes from the van der Waals interaction...

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Bibliographic Details
Published in:New journal of physics 2020-02, Vol.22 (2), p.23037
Main Authors: Yang, Li-Ping, Khandekar, Chinmay, Li, Tongcang, Jacob, Zubin
Format: Article
Language:English
Subjects:
Atomic interactions
Dipole interactions
dipole-dipole interaction force
Entanglement
entanglement force
Graphene
near-field enhancement
photon scattering
Photons
Physics
Plasmons
quantum pulses
Time dependence
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Summary:We show that a single photon pulse incident on two interacting two-level atoms induces a transient entanglement force between them. After absorption of a multi-mode Fock state pulse, the time-dependent atomic interaction mediated by the vacuum fluctuations changes from the van der Waals interaction to the resonant dipole-dipole interaction (RDDI). We explicitly show that the RDDI force induced by the single photon pulse fundamentally arises from the two-body transient entanglement between the atoms. This single photon pulse induced entanglement force can be continuously tuned from being repulsive to attractive by varying the polarization of the pulse. We further demonstrate that the entanglement force can be enhanced by more than three orders of magnitude if the atomic interactions are mediated by graphene plasmons. These results demonstrate the potential of shaped single photon pulses as a powerful tool to manipulate this entanglement force and also provides a new approach to witness transient atom-atom entanglement.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ab6f92