Quantum Computing research · Research Watch · Page 6

Journal article
Review status unknown

Study benchmarks post-quantum crypto energy use on constrained devices

Original title: Energy Consumption of Post-Quantum Cryptography on Constrained and General-Purpose Architectures

Researchers measured energy and speed of NIST post-quantum algorithms on Raspberry Pis and laptops, flagging SLH-DSA signing as costly on 32-bit hardware.

Olivier Gillot et al. · Added 7 Nov 2026 · Released Aug 2026

Journal article
Review status unknown

Theoretical work turns electron momentum recoil into a programmable quantum ladder

Original title: Quantum computing and quantum optics with recoiled free electrons

The authors report a theoretical framework that uses electron recoil to build a controllable qudit for quantum simulation and computing.

Maxim Sirotin et al. · Added 7 Nov 2026 · Released May 2026

Journal article
Peer reviewed

New circuit halves gate count for encoding surface-code quantum states

Original title: A Unitary Encoder for Surface Codes

Researchers propose a non-local encoder for surface codes that cuts circuit depth and beats prior methods in simulated noise tests.

Pei-Kai Tsai et al. · Added 7 Nov 2026 · Released Jun 2025

Journal article
Review status unknown

Researchers report geometric method to curb circuit errors without ancilla qubits

Original title: Bridging Pulse and Circuit Levels: A Geometric Framework for Deterministic Error Suppression

A journal article proposes deterministic gate sequences that the authors say bound circuit errors without logical encoding or extra qubits.

Junkai Zeng et al. · Added 7 Nov 2026

Preprint
Not peer reviewed

Preprint advances old conjecture: parallel quantum queries need structure for speedups

Original title: Parallel Quantum Advantage with Limited Adaptivity Requires Structure

A preprint extends a 2014 conjecture, showing parallel-query quantum algorithms can be classically simulated almost everywhere without special input structure.

Qipeng Liu et al. · Added 7 Nov 2026

Journal article
Peer reviewed

New gradient rule promises exact derivatives for broader quantum algorithm cost functions

Original title: Exact gradient for general cost functions in variational quantum algorithms

Researchers derive a unitary-based gradient rule for variational quantum algorithms that works beyond standard expectation-value cost functions.

Jesus Urbaneja et al. · Added 7 Nov 2026 · Released Apr 2026

Conference paper
Review status unknown

Researchers report faster distributed quantum circuits using pre-shared entanglement

Original title: Distributing Quantum Circuits Using Pre-Distributed Entanglement Pairs over Quantum Networks

A conference paper proposes pre-distributing entanglement pairs across a quantum network before circuit execution to cut computation time.

Yukun Yang et al. · Added 7 Nov 2026 · Released Apr 2026

Preprint
Not peer reviewed

Researchers report robust pulse design boosts error tolerance in superconducting qubit gates

Original title: Optimal robust single-qubit gates in superconducting quantum processors

A preprint describes pulse shapes that keep single-qubit gate fidelity high even under large amplitude and frequency errors.

Tangyou Huang et al. · Added 6 Nov 2026

Preprint
Not peer reviewed

Researchers report cryo-CMOS chip driving two-qubit gates on diamond spin qubits

Original title: Two-qubit cryo-CMOS control of a spin register in diamond

A preprint describes a cryogenic CMOS chip controlling an electron-nuclear two-qubit gate in a diamond NV centre.

H. B. van Ommen et al. · Added 6 Nov 2026

Preprint
Not peer reviewed

Researchers report quantum hardware struggles to reconstruct heat-conduction temperature fields

Original title: Transient Heat Conduction on Quantum Hardware: Replicated Temperature-Field Reconstruction and Shot-Count Sensitivity with a Variational Quantum Linear Solver

A preprint reports that a variational quantum linear solver reproduces transient heat-conduction temperature fields poorly on IBM hardware, with more shots not fixing the error.

Yijin Mao et al. · Added 6 Nov 2026

Journal article
Peer reviewed

Theory extends fusion-based graph state methods to weighted versions for photonic computing

Original title: Type-I and Type-II Fusion Protocols for Weighted Graph States

Researchers analyse how two standard fusion operations behave when applied to weighted graph states, a resource for quantum computation.

N. Rimock et al. · Added 6 Nov 2026

Preprint
Not peer reviewed

Preprint benchmarks quantum processors using multipartite nonlocality tests up to 10 qubits

Original title: Generalized Svetlichny Inequalities as a Cross-Platform Benchmark for Quantum Processors

A preprint reports that trapped-ion processors sustain Svetlichny-inequality violations up to ten qubits while a superconducting processor falters earlier.

Andrés Camilo Granda Arango et al. · Added 6 Nov 2026

Preprint
Not peer reviewed

Preprint reports linear non-Clifford gate scaling for sparse quantum state preparation

Original title: Resource-Efficient Synthesis of Sparse Quantum States

Researchers describe a method to build quantum circuits for sparse states using far fewer costly non-Clifford gates than before.

Renaud Vilmart et al. · Added 6 Nov 2026

Preprint
Not peer reviewed
From Nokia

A preprint proposes a TCP-based composite key method for post-quantum IKEv2 handshakes

Original title: PQC Migration of IPsec: Reliable Composite Key Sharing Mechanisms in IKEv2

Researchers report that combining classical and post-quantum keys into one TCP-carried handshake cuts latency and energy use versus current hybrid approaches under packet loss.

Added 6 Nov 2026

Preprint
Not peer reviewed
From Airbus Defence and Space

Preprint ties quantum circuit design to task structure via fixed spectral queries

Original title: Task-aligned spectral inductive biases in parameterized quantum circuits

Researchers propose encoding task-specific query information into quantum circuits to improve learning from limited data.

Added 5 Nov 2026

Preprint
Not peer reviewed
From Aqarios

Preprint finds single-qubit quantum circuits train worse than multi-qubit equivalents

Original title: Same Spectrum, Harder First-Order Training: Phase-Locking in Single- versus Multi-Qubit Re-Uploading Circuits

A preprint reports that single-qubit re-uploading circuits, though as expressive as multi-qubit versions, are harder to train with first-order optimisers.

Added 5 Nov 2026

Preprint
Not peer reviewed

Researchers propose a SNAIL-based route to trisqueezed mechanical quantum states

Original title: Mechanical trisqueezing in circuit quantum acoustodynamics with SNAIL devices

A preprint outlines a circuit design coupling a SNAIL to a mechanical resonator to create non-Gaussian trisqueezed states.

Yi-Zhou Bu et al. · Added 5 Nov 2026

Preprint
Not peer reviewed
From PrioriAnalytica

Preprint proposes quantum-walk method for two-stage stochastic optimisation

Original title: Quantum approximate stochastic combinatorial optimisation

Researchers report a variational quantum-walk ansatz that guides first-stage decisions in stochastic optimisation without computing recourse costs explicitly.

Added 5 Nov 2026

Preprint
Not peer reviewed

A preprint proposes a framework for optimising multipartite entanglement in quantum networks

Original title: Optimising multipartite entanglement manipulation in quantum networks

Researchers describe three operations for building long-range multipartite entanglement in quantum networks, aimed at systematic protocol optimisation.

Shashank Shekhar et al. · Added 5 Nov 2026

Preprint
Not peer reviewed

A preprint reports a quantum-resistant protocol for P2P energy trading between smart meters

Original title: Quantum-Resilient Secure Protocol for Decentralized Edge-IoT Peer-to-Peer Energy Trading Systems

Researchers propose a post-quantum, blockchain-backed key agreement scheme for IoT smart meters trading energy directly, reporting strong security and low overhead.

Ali Shahidinejad et al. · Added 5 Nov 2026

523 entries