Negative Entanglement Measure, and What It Implies

Abstract

In this paper, we extract from concurrence its variable part, denoted $\Lambda$, and use $\Lambda$ as a time-dependent measure of "distance", either postive or negative, from the separability boundary. We use it to investigate entanglement dynamics of two isolated but initially entangled qubits, each coupled to its own environment.

4 pages, 5 figures, submitted to Special Issue in Journal of Modern Optics in honor of Peter Knight

References in corpus (16)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Finite-Time Disentanglement via Spontaneous Emission
• Quantum Open System Theory: Bipartite Aspects
• Measures and dynamics of entangled states
• Dark periods and revivals of entanglement in a two qubit system
• Entanglement induced by a single-mode heat environment
• Sudden Death of Entanglement: Classical Noise Effects
• Sudden Death of Entanglement of Two Jaynes-Cummings Atoms
• Disentanglement and Decoherence by Open System Dynamics
• Qubit Disentanglement and Decoherence via Dephasing
• Phonon decoherence of quantum entanglement: Robust and fragile states
• Direct measurement of finite-time disentanglement induced by a reservoir
• Progressive Decoherence and Total Environmental Disentanglement
• Decoherence of a Measure of Entanglement
• Noise-induced finite-time disentanglement in two-atomic system
• Non-Markovian qubit dynamics in a thermal field bath: Relaxation, decoherence and entanglement

Cited by in corpus (16)

• Quantum entanglement
• Experimental investigation of the dynamics of entanglement: Sudden death, complementarity, and continuous monitoring of the environment
• Finite-time destruction of entanglement and non-locality by environmental influences
• Decoherence versus disentanglement for two qubits in a squeezed bath
• Non-Markovian Dynamics and Entanglement of Two-level Atoms in a Common Field
• Coherent State Control of Non-Interacting Quantum Entanglement
• Exact dynamics of entanglement and entropy in structured environments
• Entanglement and local extremes at an infinite-order quantum phase transition
• Understanding entanglement sudden death through multipartite entanglement and quantum correlations
• Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment
• Coherent control of multipartite entanglement
• Maximum entangled states and quantum Teleportation via Single Cooper pair Box
• Quantum recoil effects in finite-time disentanglement of two distinguishable atoms
• Dynamics of entanglement between two free atoms with quantized motion
• Negative entanglement measure for bipartite separable mixed states
• Dynamics of impurity, local and non-local information for two non identical qubits