PT Journal
AU Kim, Y
   Lee, J
   Kwon, O
   Kim, Y
TI Protecting entanglement from decoherence using weak measurement and quantum measurement reversal
SO Nature Physics
JI Nat. Phys.
PY 2012
BP 117
EP 120
VL 8
IS 2
DE fromIPMRAS
AB Decoherence, often caused by unavoidable coupling with the environment, leads to degradation of quantum coherence. For a multipartite quantum system, decoherence leads to degradation of entanglement and, in certain cases, entanglement sudden death. Tackling decoherence, thus, is a critical issue faced in quantum information, as entanglement is a vital resource for many quantum information applications including quantum computing, quantum cryptography, quantum teleportation and quantum metrology. Here, we propose and demonstrate a scheme to protect entanglement from decoherence. Our entanglement protection scheme makes use of the quantum measurement itself for actively battling against decoherence and it can effectively circumvent even entanglement sudden death.
ER