TY - GEN
T1 - Fundamental Limits of Loss Sensing over Bosonic Channels
AU - Gong, Zihao
AU - Gagatsos, Christos N.
AU - Guha, Saikat
AU - Bash, Boulat A.
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/7/12
Y1 - 2021/7/12
N2 - We consider the problem of estimating unknown loss η over n uses of single-mode lossy thermal noise bosonic channel under an average photon number constraint per mode. We prove that a product of n two-mode squeezed vacuum (TMSV) states achieves minimal quantum Cramér-Rao bound (QCRB) over Gaussian quantum states in this scenario, and characterize the optimal receiver structure. We show that TMSV minimizes QCRB over all quantum states in the limit of low input photon number. Finally, we compare the performance of our optimal receiver for TMSV to other receivers.
AB - We consider the problem of estimating unknown loss η over n uses of single-mode lossy thermal noise bosonic channel under an average photon number constraint per mode. We prove that a product of n two-mode squeezed vacuum (TMSV) states achieves minimal quantum Cramér-Rao bound (QCRB) over Gaussian quantum states in this scenario, and characterize the optimal receiver structure. We show that TMSV minimizes QCRB over all quantum states in the limit of low input photon number. Finally, we compare the performance of our optimal receiver for TMSV to other receivers.
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U2 - 10.1109/ISIT45174.2021.9517810
DO - 10.1109/ISIT45174.2021.9517810
M3 - Conference contribution
AN - SCOPUS:85115057559
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 1182
EP - 1187
BT - 2021 IEEE International Symposium on Information Theory, ISIT 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Symposium on Information Theory, ISIT 2021
Y2 - 12 July 2021 through 20 July 2021
ER -