TY - JOUR
T1 - Entanglement purification without controlled-NOT gates by using the natural dynamics of spin chains
AU - Maruyama, Koji
AU - Nori, Franco
PY - 2008/8/7
Y1 - 2008/8/7
N2 - We present a simple protocol to purify bipartite entanglement in spin- 1/2 particles by utilizing only natural spin-spin interactions, i.e., those that can commonly be realized in realistic physical systems and Sz measurements on single spins. Even the standard isotropic Heisenberg interaction is shown to be sufficient to purify mixed state entanglement. Our protocol does not need controlled-NOT (CNOT) gates that are very hard to implement experimentally. This approach could be useful for quantum-information processing in solid-state-based systems.
AB - We present a simple protocol to purify bipartite entanglement in spin- 1/2 particles by utilizing only natural spin-spin interactions, i.e., those that can commonly be realized in realistic physical systems and Sz measurements on single spins. Even the standard isotropic Heisenberg interaction is shown to be sufficient to purify mixed state entanglement. Our protocol does not need controlled-NOT (CNOT) gates that are very hard to implement experimentally. This approach could be useful for quantum-information processing in solid-state-based systems.
UR - http://www.scopus.com/inward/record.url?scp=49749143752&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.78.022312
DO - 10.1103/PhysRevA.78.022312
M3 - 学術論文
AN - SCOPUS:49749143752
SN - 1050-2947
VL - 78
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
M1 - 022312
ER -