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Technical Program

Paper Detail

Paper IDD3-S3-T4.1
Paper Title Fundamental Limits of Loss Sensing over Bosonic Channels
Authors Zihao Gong, Christos N. Gagatsos, Saikat Guha, Boulat A. Bash, University of Arizona, United States
Session D3-S3-T4: Quantum Detection & Estimation
Chaired Session: Wednesday, 14 July, 22:40 - 23:00
Engagement Session: Wednesday, 14 July, 23:00 - 23:20
Abstract We consider the problem of estimating unknown loss $\eta$ 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 Cramer-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.