Harvesting entanglement from complex scalar and fermionic fields with linearly coupled particle detectors
arXiv:2111.12779 · doi:10.1103/PhysRevD.105.065016
Abstract
We explore entanglement harvesting with particle detectors that couple linearly to non-Hermitian fields. Specifically, we analyze the case of particle detectors coupled to a complex scalar quantum field and to a spin 1/2 fermionic field. We find that the complex scalar model can be a good approximation for the fermionic model in the protocol of entanglement harvesting when the mass of the field is sufficiently large compared to the inverse interaction time. Moreover, we show that by taking advantage of the U(1) degree of freedom of a complex detector it is possible to increase the harvested negativity by up to two orders of magnitude when compared to the case of a real detector.
arXiv comment24 pages, 18 Figures, 3 Appendices. RevTeX 4.1. V4: Updated to match published version
References in corpus (39)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- A computable measure of entanglement
- Entanglement of a Pair of Quantum Bits
- The Unruh effect and its applications
- Entanglement from the vacuum
- Violating Bell's inequalities in the vacuum
- Entangling Power of an Expanding Universe
- Harvesting correlations from the quantum vacuum
- Entanglement harvesting from the electromagnetic vacuum with hydrogenlike atoms
- Wavepacket detection with the Unruh-DeWitt model
- Spacetime structure and vacuum entanglement
- Quantum Brownian Motion in a Bath of Parametric Oscillators: A model for system-field interactions
- Cosmological quantum entanglement
- Causality issues of particle detector models in QFT and Quantum Optics
- Quantum delocalization, gauge and quantum optics: The light-matter interaction in relativistic quantum information
- General Relativistic Quantum Optics: Finite-size particle detector models in curved spacetimes
- The Necessity of the Hadamard Condition
- Entangling detectors in anti-de Sitter space
- Waiting for Unruh
- Harvesting correlations in Schwarzschild and collapsing shell spacetimes
- A detector-based measurement theory for quantum field theory
- Broken covariance of particle detector models in relativistic quantum information
- Harvesting correlations from thermal and squeezed coherent states
- When entanglement harvesting is not really harvesting
- Renormalized Unruh-DeWitt Particle Detector Models for Boson and Fermion Fields
- Impossible measurements require impossible apparatus
- Entanglement Harvesting with Moving Mirrors
- Entanglement harvesting and divergences in quadratic Unruh-DeWitt detectors pairs
- Entanglement amplification between superposed detectors in flat and curved spacetimes
- Entanglement of the Vacuum between Left, Right, Future, and Past: The Origin of Entanglement-Induced Quantum Radiation
- Degenerate detectors are unable to harvest spacelike entanglement
- Einstein-Podolsky-Rosen correlations between two uniformly accelerated oscillators
- Neutrino flavor oscillations without flavor states
- The Unruh effect without thermality
- Universality and thermalization in the Unruh Effect
- Entanglement dynamics in de Sitter spacetime
- Anti-particle detector models in QFT
- The Unruh effect in slow motion
- General features of the thermalization of particle detectors and the Unruh effect
Cited by in corpus (23)
- Localized non-relativistic quantum systems in curved spacetimes: a general characterization of particle detector models
- Harvesting entanglement from the gravitational vacuum
- Effective master equations for two accelerated qubits
- Fully Relativistic Entanglement Harvesting
- Quantum entanglement in cosmology
- Ambient temperature versus ambient acceleration in the circular motion Unruh effect
- The role of quantum degrees of freedom of relativistic fields in quantum information protocols
- How measuring a quantum field affects entanglement harvesting
- Spacetime curvature from ultra rapid measurements of quantum fields
- Spontaneous entanglement leakage of two static entangled Unruh-DeWitt detectors
- Entanglement dynamics: Generalized master equation for uniformly accelerated two-level systems
- Entanglement harvesting: state dependence and covariance
- Closed-form expressions for smeared bi-distributions of a massless scalar field: non-perturbative and asymptotic results in relativistic quantum information
- Interference of communication and field correlations in entanglement harvesting
- Harvesting Fermionic Field Entanglement in Schwarzschild Spacetime
- Entanglement and correlations between local observables in de Sitter spacetime
- Entanglement between accelerated probes in a de Sitter spacetime
- Locally detecting UV cutoffs on a sphere with particle detectors
- Harvesting entanglement from the cylindrical gravitational wave spacetime
- A relativistic QFT description for the interaction of a spin with a magnetic field
- A dynamic theory of entanglement for uniformly accelerated atoms
- Quantum Field Theory in Successive Rindler Spacetimes
- Entanglement harvesting: detector gap and field mass optimization