Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
No need to calibrate: characterization and compilation for high-fidelity circuit execution using imperfect gates
Ashish Kakkar, Samuel Marsh, Yulun Wang +5 more·Nov 26, 2025
We propose and validate on real quantum computing hardware a new method for extended two-qubit gate set design, replacing iterative, fine calibration with fast characterization of a small number of gate parameters which are then tracked and corrected...
Lazy Quantum Walks with Native Multiqubit Gates
Steph Foulds, Viv Kendon·Nov 26, 2025
Quantum walks, the quantum analogue of the classical random walk, have been shown to underpin quantum algorithms for fluid dynamics. We propose the quantum half-adder gate method for quantum walks as a good benchmark algorithm, specifically to compar...
Phase Estimation with Compressed Controlled Time Evolution
Erenay Karacan·Nov 26, 2025
Many optimally scaling quantum simulation algorithms employ controlled time evolution of the Hamiltonian, which is typically the major bottleneck for their efficient implementation. This work establishes a compression protocol for encoding the contro...
Nonextensive statistics for a 2D electron gas in noncommutative spaces
Bienvenu Gnim Adewi, Isiaka Aremua·Nov 25, 2025
This work investigates a quantum system described by a Hamiltonian operator in a two dimensional noncommutative space. The system consists of an electron subjected to a perpendicular magnetic field $\mathbf{B}$, coupled to a harmonic potential and an...
Nonreciprocal quantum information processing with superconducting diodes in circuit quantum electrodynamics
Nicolas Dirnegger, Prineha Narang, Arpit Arora·Nov 25, 2025
Introducing new components and functionalities into quantum devices is critical in advancing state-of-the-art hardware. Here, we propose superconducting diodes (SDs) as a coherent nonreciprocal element in circuit quantum electrodynamics (cQED) archit...
Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers
Matteo Bergonzoni, Rosario Roberto Riso, Guido Pupillo·Nov 25, 2025
We present a theoretical scheme for a family of fast and high-fidelity two-qubit iSWAP gates between neutral atoms separated by more than 20 um, enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harness...
Fault-Tolerant Non-Clifford GKP Gates using Polynomial Phase Gates and On-Demand Noise Biasing
Minh T. P. Nguyen, Mackenzie H. Shaw·Nov 25, 2025
The Gottesman-Kitaev-Preskill (GKP) error correcting code uses a bosonic mode to encode a logical qubit, and has the attractive property that its logical Clifford gates can be implemented using Gaussian unitary gates. In contrast, a direct unitary im...
Error-structure-tailored early fault-tolerant quantum computing
Pei Zeng, Guo Zheng, Qian Xu +1 more·Nov 25, 2025
Fault tolerance is widely regarded as indispensable for achieving scalable and reliable quantum computing. However, the spacetime overhead required for fault-tolerant quantum computating remains prohibitively large. A critical challenge arises in man...
Measurement-Assisted Clifford Synthesis
Sowmitra Das·Nov 24, 2025
In this letter, we introduce a method to synthesize an $n$-qubit Clifford unitary $C$ from the stabilizer tableau of its inverse $C†$, using ancilla qubits and measurements. The procedure uses ancillary $|+\rangle$ states, controlled-Paulis, $X$-basi...
Neural surrogates for designing gravitational wave detectors
Carlos Ruiz-Gonzalez, Sören Arlt, Sebastian Lehner +5 more·Nov 24, 2025
Physics simulators are essential in science and engineering, enabling the analysis, control, and design of complex systems. In experimental sciences, they are increasingly used to automate experimental design, often via combinatorial search and optim...
Neural Architecture Search for Quantum Autoencoders
Hibah Agha, Samuel Yen-Chi Chen, Huan-Hsin Tseng +1 more·Nov 24, 2025
In recent years, machine learning and deep learning have driven advances in domains such as image classification, speech recognition, and anomaly detection by leveraging multi-layer neural networks to model complex data. Simultaneously, quantum compu...
The Harrow-Hassidim-Lloyd algorithm with qutrits
Tushti Patel, V. S. Prasannaa·Nov 22, 2025
We extend the Harrow-Hassidim-Lloyd (HHL) algorithm, which is well-studied in the qubit framework, to its qutrit counterpart (which we call qutrit HHL, as opposed to qubit HHL, which is HHL using qubits), and develop a program for its implementation....
Exact Non-Identity Check and Gate-Teleportation-Based Indistinguishability Obfuscation are NP-hard for Low-T-Depth Quantum Circuits
Joshua Nevin·Nov 22, 2025
In 2021, Broadbent and Kazmi developed a gate-teleportation-based protocol for computational indistinguishability obfuscation of quantum circuits. This protocol is efficient for Clifford+T circuits with logarithmically many T-gates, where the limitin...
Primitive Quantum Gates for an $SU(3)$ Discrete Subgroup: $Σ(72\times3)$
Sebastian Osorio Perez, Edison M. Murairi, Erik J. Gustafson +1 more·Nov 21, 2025
We construct a primitive gate set for the digital quantum simulation of a discrete subgroup of $SU(3)$: the 216-element $Σ(72\times3)$. The necessary primitives are the inversion gate, the group multiplication gate, the trace gate, and the group Four...
A Lifting Theorem for Hybrid Classical-Quantum Communication Complexity
Xudong Wu, Guangxu Yang, Penghui Yao·Nov 21, 2025
We investigates a model of hybrid classical-quantum communication complexity, in which two parties first exchange classical messages and subsequently communicate using quantum messages. We study the trade-off between the classical and quantum communi...
Efficiently learning non-Markovian noise in many-body quantum simulators
Jordi A. Montañà-López, Andreas Elben, Joonhee Choi +1 more·Nov 20, 2025
As quantum simulators are scaled up to larger system sizes and lower noise rates, non-Markovian noise channels are expected to become dominant. While provably efficient protocols for Markovian models of quantum simulators, either closed system models...
Unitary synthesis with optimal brick wall circuits
David Wierichs, Korbinian Kottmann, Nathan Killoran·Nov 20, 2025
We present quantum circuits with a brick wall structure using the optimal number of parameters and two-qubit gates to parametrize $SU(2^n)$, and provide evidence that these circuits are universal for $n\leq 5$. For this, we successfully compile rando...
ATLAS: Efficient Atom Rearrangement for Defect-Free Neutral-Atom Quantum Arrays Under Transport Loss
Otto Savola, Alexandru Paler·Nov 20, 2025
Neutral-atom quantum computers encode qubits in individually trapped atoms arranged in optical lattices. Achieving defect-free atom configurations is essential for high-fidelity quantum gates and scalable error correction, yet stochastic loading and ...
Medusa: Detecting and Removing Failures for Scalable Quantum Computing
Karoliina Oksanen, Quan Hoang, Alexandru Paler·Nov 20, 2025
Quantum circuits will experience failures that lead to computational errors. We introduce Medusa, an automated compilation method for lowering a circuit's failure rate. Medusa uses flags to predict the absence of high-weight errors. Our method can nu...
Quantum artificial intelligence for pattern recognition at high-energy colliders: Tales of Three "Quantum's"
Hideki Okawa·Nov 20, 2025
Quantum computing applications are an emerging field in high-energy physics. Its ambitious fusion with artificial intelligence is expected to deliver significant efficiency gains over existing methods and/or enable computation from a fundamentally di...