quantum-capacity

Quantum limits of positional scrambling: exact erasure capacities and size-independent bounds under local replacement noise.

Quantum capture limits for a bounded, Markov-noisy two-level receiver with free temporal encoding: exact channel simulation, zero/positive quantum-capacity boundaries, finite-time bounds, analytical proofs, and reproducible numerical checks.

Exact reflection-collection thresholds and quantum-capacity scaling for atomtronic channels, with proofs, atomic resource accounting, and reproducible checks.

Proofs and reproducible certificates for geometric conditions that yield zero optimized single-use coherent information but positive quantum capacity in flagged qubit channels with noisy measurement records, including a certified eight-use witness.

Exact quantum capacities under partial environmental observation and joint-register degradation. Includes optimal photon counting over all predetermined individual helper measurements in a qubit loss model, a strict collective-measurement rate advantage, and energy limits for vacuum optical splitting.

Quantum capacity limits of photon counting and coherent single-mode environmental measurements under optical loss and mean-energy constraints.