All coherent field states entangle equally
arXiv:1705.04341 · doi:10.1103/PhysRevD.96.025020
Abstract
We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the post-interaction density matrices of i) a single detector, ii) two detectors, and iii) the partial transpose of the latter, are all independent of which coherent state the field was in. A consequence of these results is that a detector pair can harvest the same amount of entanglement from any coherent field state as from the vacuum.
11 pages. RevTeX 4.1. Updated to fix minor typos
References in corpus (12)
- Entangling Power of an Expanding Universe
- How often does the Unruh-DeWitt detector click? Regularisation by a spatial profile
- Wavepacket detection with the Unruh-DeWitt model
- Entanglement between the future and past in the quantum vacuum
- Quantum Measurement Information as a key to Energy Release from Local Vacuums
- Information transmission without energy exchange
- Quantum Energy Teleportation in Spin Chain Systems
- Violation of the strong Huygen's principle and timelike signals from the early Universe
- Strong Local Passivity in Finite Quantum Systems
- Quantum Seismology
- What does it mean for half of an empty cavity to be full?
- Information carrying capacity of a cosmological constant
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