Entanglement harvesting between two inertial Unruh-DeWitt detectors from non-vacuum quantum fluctuations

• URL: http://arxiv.org/abs/2205.08505v2
• Date: Wed, 27 Jul 2022 07:54:00 GMT
• Title: Entanglement harvesting between two inertial Unruh-DeWitt detectors from non-vacuum quantum fluctuations
• Authors: Dipankar Barman, Subhajit Barman, Bibhas Ranjan Majhi
• Abstract summary: Entanglement harvesting from the quantum field is being rigorously investigated further in flat and different curved backgrounds. Our work presents a thorough formulation to realize the entanglement harvesting from non-vacuum background fluctuations.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entanglement harvesting from the quantum field is a well-known fact that, in recent times, is being rigorously investigated further in flat and different curved backgrounds. The usually understood formulation studies the possibility of two uncorrelated Unruh-DeWitt detectors getting entangled over time due to the effects of quantum vacuum fluctuations. Our current work presents a thorough formulation to realize the entanglement harvesting from non-vacuum background fluctuations. In particular, we further consider single excitation field states and a pair of inertial detectors, respectively, in $(1+1)$ and $(1+3)$ dimensions for this investigation. Our main observation asserts that entanglement harvesting is suppressed compared to the vacuum fluctuations in this situation. Our other observations confirm a non-zero individual detector transition probability in this background and vanishing entanglement harvesting for parallel co-moving detectors. We look into the characteristics of the harvested entanglement and discuss its dependence on different system parameters.

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