Quantum Computing research · Research Watch · Page 17

Preprint
Not peer reviewed
From IBM

Preprint extends classification of magic-state distillation codes to length 54

Original title: Classification of Generalised Triorthogonal Codes through Length 54

A preprint reports a classification of generalised triorthogonal magic-state distillation codes up to length 54, finding 74 optimal protocols.

Added 25 Oct 2026

Preprint
Not peer reviewed

Preprint reports replay-buffer redesign speeds up RL for quantum circuit optimisation

Original title: Replay-buffer engineering for noise-aware quantum circuit optimization

A preprint reports that reworking how experience is stored and replayed can cut training cost and improve sample efficiency for RL-based quantum circuit design.

Akash Kundu et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From ZuriQ

Researchers propose fast gate scheme for magnetic-field-resistant trapped-ion qubits

Original title: A magnetic-field insensitive gate set for trapped-ion nuclear spin qubits

A preprint outlines a microwave gate method letting nuclear spin qubits in Penning traps run fast while staying shielded from magnetic field noise.

Added 25 Oct 2026

Preprint
Not peer reviewed

Preprint proposes faster pseudorandom Clifford operators using a cryptographic trapdoor

Original title: Trapdoored Clifford Operators and Applications

A preprint reports a way to generate Clifford operators that look random but run much faster if you hold a secret trapdoor.

Minki Hhan et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From Cisco

Researchers report a new compiler cuts teleportation overhead in distributed quantum computers

Original title: IRIS: A Compiler for Distributed Quantum Systems

A preprint describes IRIS, a compiler that cuts teleportation counts and latency in distributed quantum systems compared with a prior state-of-the-art compiler.

Added 25 Oct 2026

Preprint
Not peer reviewed

Preprint details method to build quantum codes with targeted transversal Z-rotation gates

Original title: Realizing Logical Diagonal Gates via Transversal Physical $Z$-Rotations in CSS Codes

A preprint presents a way to extend CSS quantum codes so they transversally support chosen logical diagonal gates.

K. Sai Mineesh Reddy et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Researchers report framework for simulating quantum dynamics on topological hardware

Original title: Scalable Simulation of Quantum Dynamics on Topological Quantum Hardware

A preprint outlines a method using anyon braiding to approximate quantum dynamics propagators for molecules and condensed-phase systems.

Kritanjan Polley et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From Alice & Bob

Preprint reports cheaper quantum circuits by splitting where terms act from what they do

Original title: Efficient Block Encoding of Structured Hamiltonians by Separating Where and What

A preprint describes block-encoding circuits that separate operator placement from operator action, cutting non-Clifford gate counts for structured Hamiltonians.

Added 25 Oct 2026

Preprint
Not peer reviewed

A preprint reports a new compiler for simulating quantum chemistry on chiplet hardware

Original title: QBX: A Compiler for 2-local Qubit Hamiltonian Simulation on Quantum Chiplets

Researchers describe QBX, a compiler that tailors Hamiltonian simulation circuits to multi-chiplet quantum hardware, reportedly cutting circuit depth and gate counts.

Zikun Li et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From OptQC

Preprint describes PRISM codes enabling full Clifford gates with low-weight stabilizers

Original title: Constant-rate quantum codes with low-weight stabilizers and full logical Clifford actions via transversal and fold-transversal gates

A preprint presents a quantum code family combining constant rate and full logical Clifford gates via transversal operations alone.

Added 25 Oct 2026

Preprint
Not peer reviewed

Preprint reports fault tolerance scheme resisting near-linear adversarial qubit corruption

Original title: Fault-Tolerant Quantum Computation with Adversarial Errors

A preprint presents a quantum fault-tolerance scheme that the authors say withstands worst-case, correlated corruption of an almost-linear fraction of qudits per step.

Nikolas P. Breuckmann et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Researchers report symmetry-based method for building optimal quantum transducers

Original title: Optimal transducers using symmetries

A preprint shows how exploiting problem symmetries simplifies designing optimal transducers for quantum query algorithms.

Benoît Dubus et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Researchers report parallel bit-flipping boost for quantum LDPC belief propagation decoding

Original title: Learned Parallel Bit-Flipping Sequential Belief Propagation Decoding of Quantum LDPC Codes

A preprint describes a decoder that branches learned sequential belief propagation in parallel to improve quantum LDPC code reliability without added latency.

Mohsen Moradi et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Preprint reports optimal two-mode bosonic codes built from finite-group symmetry

Original title: Optimal two-mode bosonic loss codes from finite group symmetry

A preprint finds that optimal numerically discovered photon-loss codes share finite-group structure, which the authors turn into exact constructions.

Argyris Giannisis Manes et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

A preprint proposes multi-spin molecules to correct both dephasing and relaxation errors

Original title: Beyond Pure Dephasing: Quantum Error Correction in Single Molecules Requires Multiple Spins

Researchers outline a two-level molecular spin scheme that corrects both dephasing and relaxation noise for fault-tolerant qubits.

Matteo Mezzadri et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From Google Quantum AI

Preprint proposes multivariate quantum signal processing for several matrices at once

Original title: Multivariate Quantum Signal Processing

A preprint reports a framework for designing quantum circuits that jointly transform several noncommuting block-encoded matrices.

Added 25 Oct 2026

Preprint
Not peer reviewed

A preprint reports faster, leaner circuit design for quantum error-correction codes

Original title: SpiderCSS: Scalable Fault-Tolerant CSS State Preparation

A preprint describes SpiderCSS, a scalable method for building fault-tolerant state-preparation circuits for CSS quantum codes.

Boldizsár Poór et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Researchers report a universal scheme for converting unknown qubit states into magic states

Original title: Universal magic state concentration

A preprint describes a fixed stabilizer protocol that turns a few copies of an unknown pure qubit state into an exact CCZ magic state.

Jacopo Rizzo et al. · Added 25 Oct 2026

Preprint
Not peer reviewed

Researchers report a low-overhead way to encrypt federated training of quantum neural networks

Original title: Encryptability As a Coordinate Choice: Depth-One Homomorphic Federated Learning of Quantum Neural Networks

A preprint reports that switching to quaternion coordinates lets encrypted quantum neural network training avoid costly bootstrapping with no measurable accuracy loss.

Marcel Mordarski et al. · Added 25 Oct 2026

Preprint
Not peer reviewed
From QuEra Computing

Researchers report symmetry-preserving method for compiling quantum simulations

Original title: Symmetry-preserving quantum compilation

A preprint describes a compilation scheme that keeps SU(2) symmetry exact while cutting gate costs for simulating quantum magnetism.

Added 25 Oct 2026

523 entries