TY - JOUR
T1 - Entropic uncertainties for joint quantum measurements
AU - Brougham, T.
AU - Andersson, E.
AU - Barnett, S.M.
PY - 2009/10
Y1 - 2009/10
N2 - We investigate the uncertainty associated with a joint quantum measurement of two spin components of a
spin- 1
2 particle and quantify this in terms of entropy. We consider two entropic quantities, the joint entropy and
the sum of the marginal entropies, and obtain lower bounds for each of these quantities. For the case of joint
measurements where we measure each spin observable equally well, these lower bounds are tight.
AB - We investigate the uncertainty associated with a joint quantum measurement of two spin components of a
spin- 1
2 particle and quantify this in terms of entropy. We consider two entropic quantities, the joint entropy and
the sum of the marginal entropies, and obtain lower bounds for each of these quantities. For the case of joint
measurements where we measure each spin observable equally well, these lower bounds are tight.
KW - entropic uncertainties
KW - joint quantum measurements
UR - http://dx.doi.org/10.1103/PhysRevA.80.042106
U2 - 10.1103/PhysRevA.80.042106
DO - 10.1103/PhysRevA.80.042106
M3 - Article
VL - 80
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 4
ER -