Quantum Computing research · Research Watch · Page 10

Preprint
Not peer reviewed
From Peak Quantum

Preprint reports asymmetric indium bonding for more precise 3D chip stacking in qubits

Original title: Accurate gap control of 3D-integrated superconducting quantum circuits using asymmetric indium architecture and multi-angle flip-chip bonding

Researchers report a flip-chip bonding method that cuts chip tilt and keeps qubit coherence intact in 3D-integrated circuits.

Added 3 Nov 2026

Preprint
Not peer reviewed

Survey maps how post-quantum crypto and quantum key distribution could be combined

Original title: Combining Post-Quantum Cryptography and Quantum Key Distribution: Taxonomy, Constructions, Proofs, Standards, Deployments and Open Problems

A preprint surveys hybrid PQC-QKD designs, proposing a taxonomy and cataloguing proofs, standards and deployments.

Mona Alotaibi et al. · Added 3 Nov 2026

Preprint
Not peer reviewed
From Anthropic, QuEra Computing

Preprint reports LLM-guided search discovers smaller quantum circuits across eight tasks

Original title: Discovering state-of-the-art quantum circuits with large language models

A preprint describes an evolutionary LLM-and-evaluator framework that reportedly found more efficient reversible quantum circuits for most of eight tested tasks.

Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint links loss sharpness to shot budget in quantum Max-Cut encoding

Original title: Shot- and Noise-Aware Pauli Correlation Encoding for Max-Cut Experiments on IBM Heron Quantum Processor

A preprint reports that tuning a quantum encoding's loss sharpness to match the measurement shot budget beats published schedules on hardware.

Achraf Boussahi · Added 3 Nov 2026

Preprint
Not peer reviewed
From Quantinuum

Researchers report detailed tomography of logical qubit gates on a trapped-ion processor

Original title: Logical gate set tomography

A preprint describes a new characterisation method for logical quantum gates, applied to Quantinuum's H1 trapped-ion processor.

Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers report new way to pick quantum circuit splits for distributed computing

Original title: Entanglement-Capability-Aware Finite-Bond Circuit Cutting for Distributed Quantum Computing

A preprint proposes SACE, a two-stage method for choosing how to split quantum circuits across processors, and reports gains over existing techniques.

Weidong Liu et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers find transmon qubits reveal defects that stay excited for over a second

Original title: Superconducting circuits host two-level systems with lifetimes exceeding one second

A preprint reports that certain two-level defects near superconducting qubits keep their quantum state for more than a second, far outlasting the qubits themselves.

Mathieu Féchant et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Differentiable method learns quantum noise parameters to cut decoding errors, study reports

Original title: Differentiable Maximum Likelihood Noise Estimation for Quantum Error Correction

A preprint reports a differentiable noise-estimation method that lowers logical error rates across several quantum error correction codes.

Hanyan Cao et al. · Added 3 Nov 2026

Preprint
Not peer reviewed
From NVIDIA

Researchers report automated lattice-surgery compiler with parallel decoding for surface codes

Original title: Patchwork: automated lattice surgery and space-time partitioning for real-time decoding

A preprint describes Patchwork, a compiler automating surface-code lattice surgery with a parallel wavefront decoding scheme tested on ten logical qubits.

Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers test post-quantum key swaps in cloud object storage under load

Original title: Benchmarking Post-Quantum Key Encapsulation in S3-Compatible Object Storage under Client Concurrency

A preprint reports that swapping to ML-KEM key exchange only slows an S3-style object store when clients are near full CPU load.

Revanth Reddy Lingala et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

A preprint reports a framework to sharpen mid-circuit qubit readout using auxiliary qubits

Original title: Lifting: Quantum State Discrimination Framework for Mid-Circuit Measurements

Researchers describe Lifting, a readout framework combining extra qubit signals and context-aware calibration to improve mid-circuit measurement accuracy on IBM hardware.

Chi Zhang et al. · Added 3 Nov 2026

Preprint
Not peer reviewed
From Unitary Quantum

Researchers report entanglement between a trapped ion and a solid-state quantum memory

Original title: Heterogeneous entanglement between a trapped ion and a solid-state quantum memory

A preprint describes linking a trapped-ion qubit with a crystal-based quantum memory 75 metres apart via frequency-converted photons.

Added 2 Nov 2026

Journal article
Peer reviewed
From Fujitsu Research of America

Study maps complexity of building constraint-respecting mixers for QAOA

Original title: Imposing Constraints on Driver Hamiltonians and Mixing Operators: From Theory to Practical Implementation

The authors analyse when constraint-preserving quantum mixers can be built efficiently and test tailored mixers on 1-in-3 SAT.

Added 2 Nov 2026

Preprint
Not peer reviewed

A preprint reports privacy-preserving quantum machine learning need not cost much speed

Original title: On the Computational Complexity of Blind Quantum Machine Learning

A preprint reports a new transpiler, MasonQ, that lets blind quantum computing keep most of quantum machine learning's speed advantages.

Rex Fleur et al. · Added 2 Nov 2026

Preprint
Not peer reviewed

Researchers propose Gaussian model to simulate photon losses in optical quantum circuits

Original title: Realistic simulation of universal multiport interferometers with losses within a Gaussian formalism

A preprint proposes a Gaussian-formalism method to simulate realistic photon losses in multiport optical interferometers without full Fock-space computation.

Sebastiano Corli et al. · Added 2 Nov 2026

Preprint
Not peer reviewed

A preprint reports post-optimization fixes that shrink quantum chemistry circuit costs

Original title: Post-Optimization Subspace Corrections to Quantum Ansätze

Researchers report that adding subspace corrections after optimizing quantum chemistry circuits can cut iteration counts and measurement costs substantially.

Prince Frederick Kwao et al. · Added 2 Nov 2026

Preprint
Not peer reviewed
From NORMA

Researchers report a GPU engine that speeds up Pauli propagation simulation

Original title: PADO-Pauli: A GPU-Accelerated Implementation of Pauli Propagation

A preprint describes PADO-Pauli, a GPU-based Pauli propagation engine built for repeated training queries of variational quantum circuits.

Added 1 Nov 2026

Preprint
Not peer reviewed
From Google Quantum AI

Preprint reports stitched surface codes tested on a 105-qubit superconducting chip

Original title: Stitched surface codes: planar concatenation through GHZ corridors

A preprint describes a planar concatenated surface-code design tested on a 105-qubit Willow processor, showing lower logical error at larger distance.

Added 1 Nov 2026

Preprint
Not peer reviewed

Preprint sets theoretical limits on QKD error tolerance and range

Original title: Fundamental Limits on QBER and Distance in Quantum Key Distribution

A preprint derives maximum bit-error thresholds and distance bounds for quantum key distribution, including deep-space links.

Stefano Pirandola · Added 1 Nov 2026

Preprint
Not peer reviewed

Researchers link two trapped-ion processors to detect and correct quantum errors remotely

Original title: Error Correction in a Distributed Quantum Computer

A preprint reports the first demonstration of error detection and correction shared across two separate trapped-ion quantum processors.

E. M. Ainley et al. · Added 1 Nov 2026

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