Research

Covert Time‑Position Coding with Quickest Quantum Change‑Point Decoders

Jul 2025 – Present · ECE, University of Arizona · Advisors: Christos Gagatsos, Boulat Bash

• Fuse covert comms/sensing with quantum quickest change‑point detection (QCPD).
• Time‑position coding with QUSUM decoding; derive minimum slot‑length laws under bosonic thermal‑loss channels with covertness and false‑alarm constraints.

Best Input States for Phase‑Shift Estimation under Covariant Measurements

Sep 2024 – Aug 2025 · Advisor: Christos Gagatsos

• Characterize necessary & sufficient conditions for optimal inputs under covariant strategies; show asymptotic vanishing of the average cost.
• Provide explicit optimal inputs for a given cost function.

The Effect of Partial Post‑Selection on Quantum Discrimination

Apr 2024 – Jul 2025 · Advisor: Christos Gagatsos

• Within a general LOCC framework, prove that average error across all post‑selected branches cannot beat the original‑input optimum.
• Exhibit branches with strictly improved conditional performance (at the cost of branch probability).

Link: arXiv:2506.14105

Wavelet‑Inspired Multiscale Graph Convolutional Recurrent Network (WavGCRN)

Jun 2023 – Oct 2023

• Neural wavelet transform + multiscale graph learning; capture signal and latent graph structure across scales.
• ICASSP 2024, Seoul, Korea.