Entanglement harvesting and divergences in quadratic Unruh-DeWitt detectors pairs
arXiv:1704.08263 · doi:10.1103/PhysRevD.96.085012
Abstract
We analyze correlations between pairs of particle detectors quadratically coupled to a real scalar field. We find that, while a single quadratically coupled detector presents no divergences, when one considers pairs of detectors there emerge unanticipated persistent divergences (not regularizable via smooth switching or smearing) in the entanglement they acquire from the field. We have characterized such divergences, discussed whether a suitable regularization can allow for fair comparison of the entanglement harvesting ability of the quadratic and the linear couplings, and finally we have found a UV-safe quantifier of harvested correlations. Our results are relevant to future studies of the entanglement structure of the fermionic vacuum.
17 pages, 4 figures. RevTeX 4.1
References in corpus (17)
- Entanglement of Dirac fields in non-inertial frames
- Entangling Power of an Expanding Universe
- How often does the Unruh-DeWitt detector click? Regularisation by a spatial profile
- Fermionic mode entanglement in quantum information
- Entanglement between the future and past in the quantum vacuum
- Then again, how often does the Unruh-DeWitt detector click if we switch it carefully?
- Redistribution of particle and anti-particle entanglement in non-inertial frames
- Entanglement in curved spacetimes and cosmology
- Information transmission without energy exchange
- Fermionic entanglement that survives a black hole
- Quantum Energy Teleportation in Spin Chain Systems
- Fermionic entanglement ambiguity in non-inertial frames
- Violation of the strong Huygen's principle and timelike signals from the early Universe
- Unruh-DeWitt detector's response to fermions in flat spacetimes
- Degenerate detectors are unable to harvest spacelike entanglement
- Quantum Seismology
- (1+1)D Calculation provides evidence that quantum entanglement survives a firewall
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