Tri-partite Entanglement Witnesses and Sudden Death
arXiv:0812.4612 · doi:10.1103/PhysRevA.79.012318
Abstract
I explore entanglement dynamics in a three qubit system comparing the ability of entanglement witnesses to detect tri-partite entanglement to the phenomenon of entanglement sudden death (ESD). Using a system subject to dephasing I invoke entanglement witnesses to detect tri-partite GHZ and W-type entanglement and compare the evolution of their detection capabilites with the evolution of the negativity, bi-partite concurrence, and tri-partite negativity. Interestingly, I find a state in which there is no concurrence or tri-partite negativity but there is entanglement. Finally, I utilize a three qubit quantum error correction (QEC) code to address how ESD affects the abilities of quantum error correction.
7 pages, 4 (composite) figures, accepted PRA
References in corpus (13)
- Finite-Time Disentanglement via Spontaneous Emission
- Quantum Open System Theory: Bipartite Aspects
- Sudden Birth Versus Sudden Death of Entanglement in Multipartite Systems
- Detecting Genuine Multipartite Entanglement with Two Local Measurements
- Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
- Sudden Death of Entanglement of Two Jaynes-Cummings Atoms
- Experimental investigation of the dynamics of entanglement: Sudden death, complementarity, and continuous monitoring of the environment
- A classification of entanglement in three-qubit systems
- Scaling laws for the decay of multiqubit entanglement
- Multiparticle entanglement under the influence of decoherence
- Entanglement invariant for the double Jaynes-Cummings model
- Quantum error correction may delay, but also cause, entanglement sudden death
- Robustness of multi-qubit entanglement in the independent decoherence model
Cited by in corpus (5)
- Genuinely Multipartite Concurrence of N-qubit X-matrices
- Time-evolution of tripartite quantum discord and entanglement under local and non-local random telegraph noise
- Quantum Correlations in non-Markovian Environments
- Spin Squeezing, Negative Correlations, and Concurrence in the Quantum Kicked Top Model
- Entanglement Evolution in a Five Qubit Error Correction Code