Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Structure theorem for quantum replacer codes
Eric Chitambar, Sarah Hagen, D. Kribs +2 more·May 10, 2025
Quantum replacer codes are codes that can be protected from errors induced by a given set of quantum replacer channels, an important class of quantum channels that includes the erasures of subsets of qubits that arise in quantum error correction. We ...
Protected Symmetrical Superconducting Qubit Based on Quantum Flux Parametron
Kian Rafati Sajedi, Mojtaba Hosseinpour Choubi, M. Fardmanesh·May 10, 2025
Conventional Quantum Flux Parametrons (QFPs) have historically been used for storing classical bits in Josephson junction-based computers. In this work, we propose a novel QFP-based topology dubbed"Degenerium"qubit, to process and compute quantum inf...
Manipulating the topological spin of Majoranas
Stijn R. de Wit, Emre Duman, A. Mert Bozkurt +2 more·May 9, 2025
The non-Abelian exchange statistics of Majorana zero modes make them interesting for both technological applications and fundamental research. Unlike their non-Abelian counterpart, the Abelian contribution, $e^{iθ}$, where $θ$ is directly related to ...
Entanglement dynamics and Page curves in random permutation circuits
Dávid Szász-Schagrin, Michele Mazzoni, Bruno Bertini +2 more·May 9, 2025
The characterization of ensembles of many-qubit random states and their realization via quantum circuits are crucial tasks in quantum-information theory. In this work, we study the ensembles generated by quantum circuits that randomly permute the com...
Non-degenerate pumping of superconducting resonator parametric amplifier with evidence of phase-sensitive amplification
Songyuan Zhao, Stafford Withington, Christopher Thomas·May 9, 2025
Superconducting resonator parametric amplifiers are potentially important components for a wide variety of fundamental physics experiments and utilitarian applications. We propose and realise an operating scheme that achieves amplification through th...
Algebraic Topology Principles behind Topological Quantum Error Correction
Xiang Zou, Hoi-Kwong Lo·May 9, 2025
Quantum error correction (QEC) is crucial for realizing scalable quantum technologies, and topological quantum error correction (TQEC) has emerged as the most experimentally advanced paradigm of QEC. Existing homological and topological code construc...
Variational quantum algorithms for permutation-based combinatorial problems: Optimal ansatz generation with applications to quadratic assignment problems and beyond
Dylan Laplace Mermoud, Andrea Simonetto, Sourour Elloumi·May 9, 2025
We present a quantum variational algorithm based on a novel circuit that generates all permutations that can be spanned by one- and two-qubits permutation gates. The construction of the circuits follows from group-theoretical results, most importantl...
Subjective nature of path information in quantum mechanics
Xinhe Jiang, Armin Hochrainer, Jaroslav Kysela +4 more·May 9, 2025
Common sense suggests that a particle must have a definite origin if its full path information is available. In quantum mechanics, the knowledge of path information is captured through the well-established duality relation between path distinguishabi...
Inferring charge-noise source locations from correlations in spin qubits
Juan S. Rojas-Arias, Akito Noiri, Jun Yoneda +7 more·May 9, 2025
We investigate low-frequency noise in a spin-qubit device made in isotopically purified Si/Si-Ge. Observing sizable cross-correlations among energy fluctuations of different qubits, we conclude that these fluctuations are dominated by charge noise. A...
Efficient Quantum Convolutional Neural Networks for Image Classification: Overcoming Hardware Constraints
Peter Röseler, Oliver Schaudt, Helmut Berg +2 more·May 9, 2025
While classical convolutional neural networks (CNNs) have revolutionized image classification, the emergence of quantum computing presents new opportunities for enhancing neural network architectures. Quantum CNNs (QCNNs) leverage quantum mechanical ...
Quasiprobabilistic imaginary-time evolution on quantum computers
A. Ray, Esha Swaroop, Ningping Cao +2 more·May 9, 2025
Imaginary-time evolution plays an important role in algorithms for computing ground-state and thermal equilibrium properties of quantum systems, but can be challenging to simulate on classical computers. Many quantum algorithms for imaginary-time evo...
Hadamard Random Forest: Reconstructing real-valued quantum states with exponential reduction in measurement settings
Zhixin Song, Hang Ren, Melody Lee +3 more·May 9, 2025
Quantum tomography is a crucial tool for characterizing quantum states and devices and estimating nonlinear properties of the systems. Performing full quantum state tomography on an $N_\mathrm{q}$ qubit system requires an exponentially increasing ove...
Advancing Finite-Length Quantum Error Correction Using Generalized Bicycle Codes
Olai Å. Mostad, Hsuan-Yin Lin, E. Rosnes +2 more·May 9, 2025
Generalized bicycle (GB) codes have emerged as a promising class of quantum error-correcting codes with practical decoding capabilities. While numerous asymptotically good quantum codes and quantum low-density parity-check code constructions have bee...
The Quantum Approximate Optimization Algorithm Can Require Exponential Time to Optimize Linear Functions
Francisco Chicano, Z. Dahi, Gabriel Luque·May 9, 2025
QAOA is a hybrid quantum-classical algorithm to solve optimization problems in gate-based quantum computers. It is based on a variational quantum circuit that can be interpreted as a discretization of the annealing process that quantum annealers foll...
2D Quon Language: Unifying Framework for Cliffords, Matchgates, and Beyond
Byungmin Kang, Chen Zhao, Zhengwei Liu +2 more·May 9, 2025
Simulating generic quantum states and dynamics is practically intractable using classical computers. However, certain special classes -- namely Clifford and matchgate circuits -- permit efficient computation. They provide invaluable tools for studyin...
Quantum medical image encoding and compression using Fourier-based methods
Taehee Ko, Inho Lee, H. Yu·May 9, 2025
Quantum image processing (QIMP) has recently emerged as a promising field for modern image processing applications. In QIMP algorithms, encoding classical image informaiton into quantum circuit is important as the first step. However, most of existin...
From Fermions to Qubits: A ZX-Calculus Perspective
Haytham McDowall-Rose, R. A. Shaikh, L. Yeh·May 9, 2025
Mapping fermionic systems to qubits on a quantum computer is often the first step for algorithms in quantum chemistry and condensed matter physics. However, it is difficult to reconcile the many different approaches that have been proposed, such as t...
Landauer principle and thermodynamics of computation
Pritam Chattopadhyay, A. Misra, Tanmoy Pandit +1 more·May 9, 2025
According to the Landauer principle, any logically irreversible process accompanies entropy production, which results in heat dissipation in the environment. Erasing of information, one of the primary logically irreversible processes, has a lower bou...
Optimization of Quantum Error Correcting Code under Temporal Variation of Qubit Quality
Subrata Das, Swaroop Ghosh·May 9, 2025
Error rates in current noisy quantum hardware are not static; they vary over time and across qubits. This temporal and spatial variation challenges the effectiveness of fixed-distance quantum error correction (QEC) codes. In this paper, we analyze 12...
Optimal statistical ensembles for quantum thermal state preparation within the quantum singular value transformation framework
Yasushi Yoneta·May 9, 2025
Preparing thermal equilibrium states is an essential task for finite-temperature quantum simulations. In statistical mechanics, microstates in thermal equilibrium can be obtained from statistical ensembles. To date, numerous ensembles have been devis...