Body-Assisted van der Waals Interaction between Excited Atoms

Safari, Hassan; Karimpour, Mohammad Reza

doi:10.1103/physrevlett.114.013201

Cited by 27 publications

(43 citation statements)

References 17 publications

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“…ω) corresponding to the contributions from the free space and the reflection by graphene, respectively. The free space Green tensor has been analytically given in [46][47][48]. The reflection Green tensor can be obtained from the optical conductivity of a graphene layer (see more details in appendix E).…”

Section: Near-field Enhancement Of the Entanglement Forcementioning

confidence: 99%

Single photon pulse induced transient entanglement force

Yang

Khandekar

et al. 2020

New J. Phys.

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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 timedependent 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.

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Section: Near-field Enhancement Of the Entanglement Forcementioning

confidence: 99%

Single photon pulse induced transient entanglement force

Yang

Khandekar

et al. 2020

New J. Phys.

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“…If one of the emitters is not in its fundamental electronic state, the potential changes as a result of Förster-like processes [17,[25][26][27][28][29][30],…”

Section: Observable Far-field Potentialsmentioning

confidence: 99%

Modified and controllable dispersion interaction in a one-dimensional waveguide geometry

Haakh

Scheel

2015

Phys. Rev. A

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Dispersion interactions such as the van derWaals interaction between atoms or molecules derive from quantum fluctuations of the electromagnetic field and can be understood as the exchange of virtual photons between the interacting partners. Any modification of the environment in which those photons propagate will thus invariably lead to an alteration of the van der Waals interaction. Here we show how the two-body dispersion interaction inside a cylindrical waveguide can be made to decay asymptotically exponentially and how this effect sensitively depends on the material properties and the length scales of the problem, eventually leading to the possibility of controllable interactions. Further, we discuss the possibility to detect the retarded van der Waals interaction by resonant enhancement of the interaction between Rydberg atoms in the light of long-range potentials due to guided modes

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“…For nS-1S interactions (atomic hydrogen), this problem has recently been investigated in [3]. It was found that the interesting oscillatory 1/R 2 long-range tails [4][5][6][7][8][9][10] are numerically suppressed and become dominant only for excessively large interatomic distances, in a region where the absolute magnitude of the interaction terms is numerically insignificant. Indeed, the Casimir-Polder regime of a 1/R 7 interaction is never reached for systems with at least one atom in an excited state [9,10].…”

Section: Introductionmentioning

confidence: 99%

Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems

Adhikari

2017

Atoms

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Abstract:The collisional shift of a transition constitutes an important systematic effect in highprecision spectroscopy. Accurate values for van der Waals interaction coefficients are required in order to evaluate the distance-dependent frequency shift. We here consider the interaction of excited hydrogen 6P atoms with metastable atoms (in the 2S state), in order to explore the influence of quasi-degenerate 2P and 6S states on the dipole-dipole interaction. The motivation for the calculation is given by planned high-precision measurements of the transition. Due to the presence of quasi-degenerate levels, one can use the non-retarded approximation for the interaction terms over wide distance ranges.

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Body-Assisted van der Waals Interaction between Excited Atoms

Cited by 27 publications

References 17 publications

Single photon pulse induced transient entanglement force

Single photon pulse induced transient entanglement force

Modified and controllable dispersion interaction in a one-dimensional waveguide geometry

Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems

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