quant-ph · 2026-06-09 · No. 18

Quantum Physics, 2026-06-09.

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

    Who Earns the Safety? Intervention-Aware Quantum Predictive Control with Safety Attribution

    Yifan Wang

    quant-ph · cs.AI

    Hard safety filters are increasingly placed downstream of learned controllers to guarantee constraint satisfaction at run time. Yet a filtered controller that never violates a constraint may still have learned nothing about safety: the filter can silently repair an incompetent upstream policy, so that post-filter success measures the filter, not the policy. We argue that safe policy learning should ask who earns the safety - the policy or its...

    arxiv.org/abs/2606.09778 · PDF

  2. 02

    Adaptive directional gradients for parameterised quantum circuits

    Brian Coyle, Snehal Raj, Virag Umathe, El Amine Cherrat, Elham Kashefi

    quant-ph · cs.LG

    Training parameterised quantum circuits (PQCs) on quantum hardware is bottlenecked by the measurement cost of gradient estimation, which under the parameter-shift rule scales linearly in the number of trainable parameters and dominates the total shot budget of training at scale. In this work, we propose a framework of forward gradient estimators for PQCs, based on the forward mode of automatic differentiation, that yields an unbiased...

    arxiv.org/abs/2606.09734 · PDF

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