Quantum discord between relatively accelerated observers
arXiv:0905.3301 · doi:10.1103/PhysRevA.80.052304
Abstract
We calculate the quantum discord between two free modes of a scalar field which start in a maximally entangled state and then undergo a relative, constant acceleration. In a regime where there is no distillable entanglement due to the Unruh effect, we show that there is a finite amount of quantum discord, which is a measure of purely quantum correlations in a state, over and above quantum entanglement. Even in the limit of infinite acceleration of the observer detecting one of the modes, we provide evidence for a non-zero amount of purely quantum correlations, which might be exploited to gain non-trivial quantum advantages.
4 pages, 2 figures
References in corpus (16)
- Quantum discord and the power of one qubit
- The Unruh effect and its applications
- Entanglement of Dirac fields in non-inertial frames
- Quantum Entanglement of Moving Bodies
- Signatures of non-classicality in mixed-state quantum computation
- Continuous variable entanglement sharing in non-inertial frames
- Correlations in local measurements on a quantum state, and complementarity as an explanation of nonclassicality
- Detection of acceleration radiation in a Bose-Einstein condensate
- Entangled Light in Moving Frames
- Comment on "Quantum entropy and special relativity" [by A. Peres, P. F. Scudo, and D. R. Terno, Phys. Rev. Lett. 88, 230402 (2002)]
- Lorentz transformations that entangle spins and entangle momenta
- Lorentz-invariant Bell's inequality
- Private information via the Unruh effect
- Einstein-Podolsky-Rosen correlations between two uniformly accelerated oscillators
- Strange behavior of the relativistic Einstein-Podolsky-Rosen correlations
- A Lorentz Invariant Pairing Mechanism: Relativistic Cooper Pairs
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- The classical-quantum boundary for correlations: discord and related measures
- Sudden transition between classical and quantum decoherence
- Almost all quantum states have non-classical correlations
- Interpreting quantum discord through quantum state merging
- Quantum discord for general two--qubit states: Analytical progress
- The Unruh effect in quantum information beyond the single-mode approximation
- Quantum coherence and geometric quantum discord
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- Unveiling quantum entanglement degradation near a Schwarzschild black hole
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- Quantum and classical correlations in the one-dimensional XY model with Dzyaloshinskii-Moriya interaction
- Theoretical and experimental aspects of quantum discord and related measures
- Quantum fisher information in noninertial frames
- Classical correlation and quantum discord sharing of Dirac fields in noninertial frames
- Redistribution of particle and anti-particle entanglement in non-inertial frames
- Tight lower bound to the geometric measure of quantum discord
- Faithful nonclassicality indicators and extremal quantum correlations in two-qubit states
- Sudden change in quantum and classical correlations and the Unruh effect
- Experimental investigation of the non-Markovian dynamics of classical and quantum correlations
- Quantum Dissension: Generalizing Quantum Discord for Three-Qubit States
- Entanglement and discord: accelerated observations of local and global modes
- Quantum discord and measurement-induced disturbance in the background of dilaton black holes
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- Measurement-induced disturbances and nonclassical correlations of Gaussian states
- Radiative processes of uniformly accelerated entangled atoms
- Accessible and inaccessible quantum coherence in relativistic quantum systems
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- Vanishing Geometric Discord in Non-Inertial Frames
- Vacuum State of the Dirac Field in de Sitter Space and Entanglement Entropy
- Radiative processes of two entangled atoms outside a Schwarzschild black hole
- Quantifying the Nonclassicality of Operations
- Entanglement of arbitrary spin fields in non-inertial frames
- Magnetic quantum correlation in the 1D transverse-field XXZ model
- Thermal amplification of field-correlation harvesting
- Nonlocality and Entanglement via the Unruh effect
- Continuous variable methods in relativistic quantum information: Characterisation of quantum and classical correlations of scalar field modes in noninertial frames
- Measurement-Induced-Nonlocality via the Unruh effect
- Entanglement degradation as a tool to detect signatures of quantum gravity
- Basis-independent quantum coherence and its distribution under relativistic motion
- Entanglement Enhanced Thermometry in the Detection of the Unruh Effect
- Comparison of different measures for quantum discord under non-Markovian noise
- Dynamics of multipartite quantum correlations under decoherence
- Spatially extended Unruh-DeWitt detectors for relativistic quantum information
- How the Hawking effect and prepared states affect Entanglement distillability of Dirac fields
- Sudden Change of Quantum Discord under Single Qubit Noise
- Conditions for separability in multiqubit systems with an accelerating qubit using a conditional entropy
- Shaking photons from the vacuum: acceleration radiation from vibrating atoms
- Entanglement dynamics: Generalized master equation for uniformly accelerated two-level systems
- Discord and entanglement in non-Markovian environments at finite temperature
- Characterization of quantum and classical correlations in the Earth curved space-time
- Geometric measure of quantum discord and total quantum correlations in a N-partite quantum state
- Enhancement of non-equilibrium thermal quantum discord and entanglement of a three-spin XX chain by multi-spin interaction and external magnetic field
- Some measures for fermionic entanglement in the cosmological de Sitter spacetime
- Probing Planckian physics in de Sitter space with quantum correlations
- Quantum discord of 2n-dimensional Bell-diagonal states
- Non-classicalities via perturbing local unitary operations
- Quantum conditional mutual information of W state in non-inertial frames
- Change of quantum correlation for two simultaneously accelerated observers
- Multipartite Generalization of Geometric measure of Discord
- Detecting Two Qubit Both-Way Positive Discord States
- A dynamic theory of entanglement for uniformly accelerated atoms
- Localised Systems in Relativistic Quantum Information
- Sudden change of interferometric power for X shape states
- Correlation Redistribution by Causal Horizons
- Any Two Qubit State Has Non Zero Quantum Discord Under Global Unitary Operations
- Quantum Discord and Quantum Entanglement in the Background of an Asymptotically Flat Static Black Holes
- Bipartite quantum coherence in noninertial frames