Qian Xu

Quantum capacity and codes for the bosonic loss-dephasing channel

2022 · arXiv (Cornell University)

Bosonic qubits encoded in continuous-variable systems provide a promising alternative to two-level qubits for quantum computation and communication. So far, photon loss has been the dominant source of errors in bosonic qubits, but the significant …

Construction of Bias-preserving Operations for Pair-cat Code

2022 · arXiv (Cornell University)

Fault-tolerant quantum computation with depolarization error often requires demanding error threshold and resource overhead. If the operations can maintain high noise bias -- dominated by dephasing error with small bit-flip error -- we can achieve …

Dark Spin-Cat States as Biased Qubits

2025 · Physical Review Letters

We present a biased atomic qubit, universally implementable across all atomic platforms, encoded as a "spin cat" within ground state Zeeman levels. The key characteristic of our configuration is the coupling of the ground state …

Discerning MOS of Video Conferencing via Deep Packet Inspection and Video Context Clues

2025

Monitoring the Mean Opinion Score (MOS) of video conferencing is critical for Internet Service Providers (ISPs) to ensure user satisfaction. However, a significant technical challenge arises: MOS is a subjective measure, while ISPs primarily rely …