TY - GEN
T1 - Entropy power inequalities and classical capacities of bosonic noise channels
AU - Konig, Robert
AU - Smith, Graeme
PY - 2013
Y1 - 2013
N2 - Characterizing information-carrying capacities of bosonic communication channels is of significant practical interest. For thermal noise channels, using coherent (product) states yields an achievable rate for classical communication which is conjectured to be optimal. However, it is not known whether coding strategies using entanglement may perform better. Here we discuss upper bounds on classical capacities of thermal noise channels. These imply that coherent-state coding is close to optimal. Our main tool is a quantum analog of the entropy power inequality introduced Shannon. It gives a lower bound on the output von Neumann entropy when two independent signals combine at a beamsplitter. 1
AB - Characterizing information-carrying capacities of bosonic communication channels is of significant practical interest. For thermal noise channels, using coherent (product) states yields an achievable rate for classical communication which is conjectured to be optimal. However, it is not known whether coding strategies using entanglement may perform better. Here we discuss upper bounds on classical capacities of thermal noise channels. These imply that coherent-state coding is close to optimal. Our main tool is a quantum analog of the entropy power inequality introduced Shannon. It gives a lower bound on the output von Neumann entropy when two independent signals combine at a beamsplitter. 1
UR - http://www.scopus.com/inward/record.url?scp=84887449133&partnerID=8YFLogxK
U2 - 10.1109/PHOSST.2013.6614515
DO - 10.1109/PHOSST.2013.6614515
M3 - Conference contribution
AN - SCOPUS:84887449133
SN - 9781467350600
T3 - 2013 IEEE Photonics Society Summer Topical Meeting Series, PSSTMS 2013
SP - 153
EP - 154
BT - 2013 IEEE Photonics Society Summer Topical Meeting Series, PSSTMS 2013
T2 - 2013 IEEE Photonics Society Summer Topical Meeting Series, PSSTMS 2013
Y2 - 8 July 2013 through 10 July 2013
ER -