quant-ph · 2026-10-02 · No. 131

Quantum Physics, 2026-10-02.

2 new papers in quant-ph. Titles, authors, abstracts. Links to arXiv. Want this in your inbox every morning? Subscribe →

01 — The papers

2 entries
  1. 01

    Sequential Capacity of Quantum Processes with Finite Memory

    Yibin Wang

    quant-ph · cs.LG

    How complex can the responses of a quantum device become as it runs longer with a fixed internal memory? We quantify this complexity through sequential response capacity: how many adaptive testing stages, each using a fresh run, can continue to separate possible processes by a prescribed gap in response probabilities. For fixed system and memory sizes, we establish a tight law relating this capacity to run length and probability resolution....

    arxiv.org/abs/2610.02068 · PDF

  2. 02

    Learnt Attacks on Quantum Key Distribution under Channel Noise and Device Drift

    Marcel Mordarski, Benjamin Gras, Abdelrahman Shehata, Daniel Budina, Roberto Bondesan

    quant-ph · cs.CR · cs.IT · cs.LG

    Quantum key distribution (QKD) links are provisioned from security analyses of stationary channels, whereas the devices that determine the channel drift between recalibrations. Whether an eavesdropper who cannot alter the channel's own noise gains by following that drift has not been quantified. Adaptive eavesdropping is posed here as a constrained Markov decision process in which the attacker selects one circuit per round while the noise...

    arxiv.org/abs/2610.01792 · PDF

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