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Quantum Computing research

Quantum computing foundations, algorithms and programming, error correction and hardware, post-quantum security, and where the industry stands.

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523 entries

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  • Preprint
  • Not peer reviewed

Preprint finds two uses cannot fix noisy qubit gates, but three can

Original title: Distilling Qubit Unitary Operations: A No-Go Theorem and Minimal Realization

A preprint reports that purifying noisy single-qubit gates needs at least three uses of the channel, with two proven useless.

Jiayi Zhao et al. · Added

  • Preprint
  • Not peer reviewed
  • From Pengxin Quantum Technology

Preprint reports machine-checkable certificates for quantum code distances

Original title: Quantum code parameters, checkable by a certificate of provable size

A preprint reports a Lean-verified certificate method that checks quantum error-correcting code distances instead of trusting solver outputs.

Added

  • Preprint
  • Not peer reviewed

Preprint sets tight query bounds on faking quantum sampling scores

Original title: Tight Query Lower Bounds for Quantum Sampling, with an Application to Certified Randomness

A preprint proves tight limits on how many queries a device needs to beat the honest score in quantum sampling, with implications for certified randomness.

Keshav Bhateja et al. · Added

  • Preprint
  • Not peer reviewed

Preprint proposes a Hamiltonian-level check for splitting quantum simulations into modules

Original title: A Hamiltonian-Level Certificate for Network-Free Distributed Quantum Simulation:Exact Tensor-Separability Criterion and Approximate Residual Bounds

A preprint describes a way to test, from the Hamiltonian itself, whether a quantum simulation can be split into independent modules without errors.

Kan He et al. · Added

  • Preprint
  • Not peer reviewed
  • From Technergetics, Booz Allen Hamilton, Murray Associates

A preprint proposes time-bin quantum sensing for dynamic radio-frequency fields

Original title: Dynamic distributed quantum sensing of radio-frequency fields via time-bin entanglement

Researchers propose using time-bin entangled photons instead of polarisation to let distributed quantum sensors track time-varying RF signals.

Added

  • Preprint
  • Not peer reviewed

Preprint proposes quantum algorithms for functions of multiple commuting matrices

Original title: Contour-integral and Fourier transform based multivariable quantum eigenvalue transformation for commuting matrices

A preprint describes two quantum methods to apply functions to several commuting matrices at once, with trade-offs between qubits and query cost.

Shan Jiang et al. · Added

  • Preprint
  • Not peer reviewed

Preprint certifies hardware entanglement in a corrected QAOA layer on a five-qubit chip

Original title: Certifying bipartite entanglement on a superconducting processor from a corrected QAOA cost layer

A preprint reports a pre-registered test certifying bipartite entanglement in a QAOA cost layer on a superconducting processor, with a separate causal check on coupler drive.

Carlos-Miguel Lorenzo · Added