Quantum Observatory

Research overview

A weekly view of quantum computing and quantum information research.

Last collected Nov 2, 20265 of 6 collection sources available · View coverage
New research
347
Unique linked works
Conference talks
0
Accepted contributions
Reports
0
Known dates only
Active topics
8
Topics can overlap

Below threshold: what a surface-code memory proves

Increasing code distance can improve a logical memory while leaving important computational capabilities untested. Use the measured task, denominator, and decoder conditions to assess the claim.

Read the full analysis →

Recent research

Recent papers and reports from selected public sources. Follow each title to the original material.

Explore all research ↗
  1. 2026-10-30
    PreprintarXiv

    Secret-shared teleportation of a two-qudit gate with a deferred recipient

    Tanay Roy

    Citations not indexed
  2. 2026-10-30
    PreprintarXiv

    Time-optimal quantum dynamics under fixed-norm generators

    Oskar A. Prośniak, Karol Życzkowski

    Citations not indexed
  3. 2026-10-30
    PreprintarXiv

    Weighted hypergraph states as a resource for quantum metrology

    B. J. Alexander, M. S. Tame

    Citations not indexed
  4. 2026-10-30
    PreprintarXiv

    Functional Tensor Trains for High-Order Greeks and Exposure Tails of Multi-Asset Structured Products

    Javier Lopez-Piqueres, Atithi Acharya, Yue Sun, Niraj Kumar

    Citations not indexed
  5. 2026-10-30
    PreprintarXiv

    Topologically Protected Edge States in a Single Flux Qubit

    Pablo Perez-Fernandez, Manuel Pino

    Citations not indexed
  6. 2026-10-30
    PreprintarXiv

    Charge Pumping Leptogenesis from the Symmetric Mass Generation Phase on a Four-Leg Ladder Lattice

    Runze Chi, Meng Zeng, Tao Xiang, Yi-Zhuang You

    Citations not indexed
  7. 2026-10-30
    PreprintarXiv

    The Quartic Gap Between Quantum and Dequantized Algorithms for Linear Algebra Is Tight

    Shouvanik Chakrabarti, Dylan Herman, Junhyung Lyle Kim, Guneykan Ozgul

    Citations not indexed
  8. 2026-10-30
    PreprintarXiv

    Benchmarking Single-Photon Sources for Measurement-Device-Independent Quantum Key Distribution

    Janka Memmen, Yvonne Lasars, Tobias Heindel, Nathan Walk

    Citations not indexed
  9. 2026-10-30
    PreprintarXiv

    Empirical Evaluation of Quantum Kernel Methods for Classification: A Comparative Study with Classical Kernels

    Ronak Bhalgami

    Citations not indexed
  10. 2026-10-30
    PreprintarXiv

    Logical Bell Inequalities for Marginal Wigner Negativity

    Sanchit Srivastava, Selman Ipek, Cihan Okay, Shohini Ghose

    Citations not indexed

Read the evidence

Guides and analysis that explain how to interpret the index.

Below threshold: what a surface-code memory proves

Increasing code distance can improve a logical memory while leaving important computational capabilities untested. Use the measured task, denominator, and decoder conditions to assess the claim.

Analysis · Quantum Observatory

48 logical qubits: read the acceptance conditions too

A logical-qubit count becomes informative when paired with encoding, circuit, evaluation metric, and retained trials. This note offers a worksheet for comparing demonstrations with different selection conditions.

Analysis · Quantum Observatory

Better than physical: which circuit is the baseline?

An improvement factor needs its physical baseline and selection rule. Use this paper to practice comparing an encoded circuit with the actual unencoded task, rather than a headline gate fidelity.

Analysis · Quantum Observatory