TY - JOUR
T1 - Quantum discord, local operations, and Maxwell's demons
AU - Brodutch, Aharon
AU - Terno, Daniel R.
PY - 2010/6/4
Y1 - 2010/6/4
N2 - Quantum discord was proposed as a measure of the quantumness of correlations. There are at least three different discordlike quantities, two of which determine the difference between the efficiencies of a Szilard's engine under different sets of restrictions. The three discord measures vanish simultaneously. We introduce an easy way to test for zero discord, relate it to the Cerf-Adami conditional entropy and show that there is no simple relation between the discord and the local distinguishability.
AB - Quantum discord was proposed as a measure of the quantumness of correlations. There are at least three different discordlike quantities, two of which determine the difference between the efficiencies of a Szilard's engine under different sets of restrictions. The three discord measures vanish simultaneously. We introduce an easy way to test for zero discord, relate it to the Cerf-Adami conditional entropy and show that there is no simple relation between the discord and the local distinguishability.
UR - http://www.scopus.com/inward/record.url?scp=77953207537&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.81.062103
DO - 10.1103/PhysRevA.81.062103
M3 - Article
AN - SCOPUS:77953207537
SN - 1050-2947
VL - 81
SP - 1
EP - 6
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 062103
ER -