6533b857fe1ef96bd12b5144

RESEARCH PRODUCT

Entanglement production by quantum error correction in the presence of correlated environment

Chiara MacchiavelloG. M. PalmaG. De ChiaraRosario Fazio

subject

PhysicsQuantum PhysicsDephasingCondensed Matter (cond-mat)FOS: Physical sciencesGeneral Physics and AstronomyTheoryofComputation_GENERALQuantum entanglementData_CODINGANDINFORMATIONTHEORYQuantum PhysicsCondensed MatterQuantum error correctionQuantum mechanicsQubitProduction (computer science)Quantum Physics (quant-ph)Error detection and correctionQuantum

description

We analyze the effect of a quantum error correcting code on the entanglement of encoded logical qubits in the presence of a dephasing interaction with a correlated environment. Such correlated reservoir introduces entanglement between physical qubits. We show that for short times the quantum error correction interprets such entanglement as errors and suppresses it. However for longer time, although quantum error correction is no longer able to correct errors, it enhances the rate of entanglement production due to the interaction with the environment.

yearjournalcountryeditionlanguage
2003-10-29
http://hdl.handle.net/10447/5237