quant-ph · 2026-09-10 · No. 111

Quantum Physics, 2026-09-10.

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

    Optimal Low-Rank Quantum State Tomography with Bounded-Sample Joint Measurements

    Ashwin Nayak, Xingyu Zhou

    quant-ph · cs.DS · cs.IT · cs.LG

    We determine the optimal sample complexity of low-rank quantum state tomography when each measurement may act jointly on at most $t$ samples. For sufficiently small $\varepsilon$, estimating an unknown state on $\mathbb{C}^d$ of rank at most $r$ to trace norm error $\varepsilon$ with constant success probability requires, and is achievable with, $$ Θ\left( \frac{dr}{\varepsilon^2} \max\left\{1,\frac r{\sqrt t}\right\} \right)$$ samples. The...

    arxiv.org/abs/2609.10514 · PDF

  2. 02

    The Sample Complexity of Quantum Entanglement Allocation

    Nathan Roll

    quant-ph · cs.LG

    How many past requests are needed to decide which qubits should share entanglement? We show that the answer depends on the allocation choices created by the queries: a larger memory can require no more data. The memory stores a classical bit and answers requests through a fixed detector that preserves coherence within each measured sector. For independent commuting $X$- and $Z$-type Pauli queries, we characterize the full attainable...

    arxiv.org/abs/2609.10141 · PDF

  3. 03

    Fidelity-Aware Scheduling of Quantum Circuits on Multi-QPU Systems

    Innocenzo Fulginiti, Antonio Tudisco, Salvatore Zammuto, Patrick Hopf, Deborah Volpe, Helmut Seidl, Giovanna...

    quant-ph · cs.AI · cs.ET

    High Performance Computing-Quantum Computing (HPCQC) platforms expose multiple Quantum Processing Units (QPUs) that may differ in size, topology, native gates, and noise characteristics. For current noisy devices, errors compound along the compiled circuits quickly, and minimizing them, that is, maximizing the circuits' execution fidelity, is essential for reliable results. Fidelity depends on the compilation to a specific target device: the...

    arxiv.org/abs/2609.09980 · PDF

This edition is part of The Daily Abstract — quant-ph archive. Subscribe to receive these in your inbox each morning, automatically translated to Spanish, with reply-to-PDF: arxivdaily.ignorelist.com.

Colophon Set in Georgia, with system sans for interface chrome and a monospaced stack for code and paper identifiers. Sole accent: amber #D99C5E. Built and served on an always-free VM. The masthead is set 14% letterspaced because newspapers do that and it works.