quant-ph · 2026-06-19 · No. 28

Quantum Physics, 2026-06-19.

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

01 — The papers

3 entries
  1. 01

    Entropy Estimation in Multi-Qutrit Systems via Variational and Classical Neural Networks

    Sai Sakunthala Guddanti, Anil Prabhakar, Ria Rushin Joseph

    quant-ph · cs.LG

    We present a systematic study of von Neumann entropy estimation in multi-qutrit quantum systems using two complementary approaches: variational quantum algorithms (VQAs) and classical convolutional neural networks (CNNs), evaluated using an ideal (noise-free) quantum simulator. For systems up to three qutrits, we construct and evaluate 11 hardware-efficient SU(3)-inspired ansatzes. A parameter sweep shows that estimation accuracy is primarily...

    arxiv.org/abs/2606.20504 · PDF

  2. 02

    Quantum ring all-reduce: communication and privacy advantages for distributed learning

    María Gragera Garcés, Lirandë Pira

    quant-ph · cs.DC · cs.LG

    Machine learning models have scaled to unprecedented sizes, making training across distributed devices the de facto standard in the field. In this work, we explore how quantum communications can make distributed training both more communication-efficient and information-theoretically private, for both classical and quantum learning models. Ring all-reduce is the foundational communication primitive for large-scale distributed training. We...

    arxiv.org/abs/2606.20344 · PDF

  3. 03

    QMaxCal: Path-Space Regularization for Open Quantum Control via Girsanov's Theorem

    Merijn Moody, Zier Mensch, Miranda C. N. Cheng, Peter G. Bolhuis, Max Welling

    quant-ph · cs.LG

    Reliable quantum control in the presence of decoherence requires policies that combat the effect of environmental noise on the controlled dynamics. Open quantum systems under continuous monitoring generate classical measurement records whose drift depends on the noise experienced by the system; the records of two evolutions sharing the same decoherence channels differ only in this drift, so Girsanov's theorem yields a closed-form,...

    arxiv.org/abs/2606.19947 · PDF

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