Entanglement harvesting with coherently delocalized matter
- URL: http://arxiv.org/abs/2006.11291v1
- Date: Fri, 19 Jun 2020 18:00:02 GMT
- Title: Entanglement harvesting with coherently delocalized matter
- Authors: Nadine Stritzelberger, Laura J. Henderson, Valentina Baccetti, Nicolas
C. Menicucci, and Achim Kempf
- Abstract summary: We study entanglement harvesting for matter systems whose center of mass degrees of freedom are quantum delocalized.
We employ a generalized Unruh-deWitt detector model for the light-matter interaction.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study entanglement harvesting for matter systems such as atoms, ions or
molecules, whose center of mass degrees of freedom are quantum delocalized and
which couple to a relativistic quantum field. We employ a generalized
Unruh-deWitt detector model for the light-matter interaction, and we
investigate how the coherent spreading of the quantum center of mass wave
function of two delocalized detector systems impacts their ability to become
entangled with one another, via their respective interaction with a quantum
field. For very massive detectors with initially highly localized centers of
mass, we recover the results of entanglement harvesting for pointlike
Unruh-deWitt detectors with classical center of mass degrees of freedom. We
find that entanglement harvesting is Gaussian suppressed in the initial center
of mass delocalization of the detectors. We further find that spatial smearing
profiles, which are commonly employed to model the finite size of atoms due to
their atomic orbitals, are not suited to model center of mass delocalization.
Finally, for coherently delocalized detectors, we compare entanglement
harvesting in the vacuum to entanglement harvesting in media. We find that
entanglement harvesting is significantly suppressed in media in which the wave
propagation speed is much smaller than the vacuum speed of light.
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