TY - GEN
T1 - Quantum measurements constrained by symmetries
AU - Busch, P.
AU - D. Loveridge, L.
PY - 2013/9
Y1 - 2013/9
N2 - We revisit the theorem of Wigner, Araki and Yanase (WAY) describing limitations to repeatable quantum measurements that arise from the presence of conservation laws. We will review a strengthening of this theorem by exhibiting and discussing a condition that has hitherto not been identified as a relevant factor. We will also show that an extension of the theorem to continuous variables such as position and momentum can be obtained if the degree of repeatability is suitably quantified.
AB - We revisit the theorem of Wigner, Araki and Yanase (WAY) describing limitations to repeatable quantum measurements that arise from the presence of conservation laws. We will review a strengthening of this theorem by exhibiting and discussing a condition that has hitherto not been identified as a relevant factor. We will also show that an extension of the theorem to continuous variables such as position and momentum can be obtained if the degree of repeatability is suitably quantified.
KW - quant-ph
KW - 81P15
U2 - 10.1142/9789814518550_0083
DO - 10.1142/9789814518550_0083
M3 - Conference contribution
SN - 978-981-4518-54-3
VL - 11
T3 - Nankai Series in Pure, Applied Mathematics and Theoretical Physics
SP - 587
EP - 592
BT - Symmetries and groups in contemporary physics
A2 - Bai, Chengming
A2 - Gazeau, Jean-Pierre
A2 - Ge, Mo-Lin
PB - World Scientific Publishing
CY - Singapore
T2 - The XXIX International Colloquium on Group-Theoretical Methods in Physics
Y2 - 20 August 2012 through 26 August 2012
ER -