Freezing distributed entanglement in spin chains

Abstract

We show how to freeze distributed entanglement that has been created from the natural dynamics of spin chain systems. The technique that we propose simply requires single-qubit operations and isolates the entanglement in specific qubits at the ends of branches. Such frozen entanglement provides a useful resource, for example for teleportation or distributed quantum processing. The scheme can be applied to a wide range of systems -- including actual spin systems and alternative qubit embodiments in strings of quantum dots, molecules or atoms.

5 pages, to appear in Phys. Rev. A (Rapid Communication)

References in corpus (7)

• Perfect Transfer of Arbitrary States in Quantum Spin Networks
• The Propagation of Quantum Information Through a Spin System
• Spin Chains as Perfect Quantum State Mirrors
• Perfect quantum state transfer with randomly coupled quantum chains
• From perfect to fractal transmission in spin chains
• Quantum Communication in Spin Systems With Long-Range Interactions
• Quantum information transport to multiple receivers

Cited by in corpus (4)

• Quantum Ratchets for Quantum Communication with Optical Superlattices
• Exploiting Quench Dynamics in Spin Chains for Distant Entanglement and Quantum Communication
• Large Spin Entangled Current from a Passive Device
• Cooling ultracold bosons in optical lattices by spectral transform