Extraction of Pure Entangled States from Many Body Systems by Distant Local Projections
arXiv:0903.4553 · doi:10.1103/PhysRevA.79.062310
Abstract
We study the feasibility of extracting a pure entangled state of non-complementary, and potentially well separated, regions of a quantum many-body system. It is shown that this can indeed be accomplished in non-equilibrium scenarios as well as the ground state of the considered spin chain models when one locally measures observables such as magnetization in separated blocks of spins. A general procedure is presented, which can search for the optimal way to extract a pure entangled state through local projections. Our results indicate a connection of the projective extraction of entanglement to good quantum numbers of the underlying Hamiltonian.
arXiv comment7 pages, 5 figures. Comments welcome
References in corpus (18)
- Entanglement in quantum critical phenomena
- Real time evolution using the density matrix renormalization group
- Evolution of Entanglement Entropy in One-Dimensional Systems
- Quantum Communication through Spin Chain Dynamics: an Introductory Overview
- Entanglement and correlation functions following a local quench: a conformal field theory approach
- The entanglement of indistinguishable particles shared between two parties
- Entanglement in XY Spin Chain
- Localizable Entanglement
- Detection of vacuum entanglement in a linear ion trap
- Entanglement of indistinguishable particles in condensed matter physics
- Single-copy entanglement in critical spin chains
- Entanglement evolution after connecting finite to infinite quantum chains
- Half the entanglement in critical systems is distillable from a single specimen
- Supersinglets
- A Processor Core Model for Quantum Computing
- Entanglement and Density Matrix of a Block of Spins in AKLT Model
- Single-copy entanglement in a gapped quantum spin chain
- Multi-level, multi-party singlets as ground states and their role in entanglement distribution