Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Unraveling spin entanglement using quantum gates with scanning tunneling microscopy-driven electron spin resonance
Eric D. Switzer, Jose Reina-G'alvez, G. Giedke +4 more·May 14, 2025
Quantum entanglement is a fundamental resource for quantum information processing, and its controlled generation and detection remain key challenges in scalable quantum architectures. Here, we numerically demonstrate the deterministic generation of e...
Quantum Error-Corrected Computation of Molecular Energies
Kentaro Yamamoto, Yuta Kikuchi, D. Amaro +18 more·May 14, 2025
We present the first demonstration of an end-to-end pipeline with quantum error correction (QEC) for a quantum computation of the electronic structure of molecular systems. We calculate the ground-state energy of molecular hydrogen, using quantum pha...
Augmenting Density Matrix Renormalization Group with Matchgates and Clifford circuits
Jiale Huang, Xiangjian Qian, Zhendong Li +1 more·May 13, 2025
Matchgates and Clifford circuits are two types of quantum circuits which can be efficiently simulated classically, though the underlying reasons are quite different. Matchgates are essentially the single particle basis transformations in the Majorana...
High-contrast interaction between remote superconducting qubits mediated by multimode cable coupling
Jiajian Zhang, Ji Chu, Jingjing Niu +2 more·May 13, 2025
Superconducting quantum processors offer a promising path toward practical quantum computing. However, building a fault-tolerant quantum computer with millions of superconducting qubits is hindered by wiring density, packaging constraints, and fabric...
Scalable Trapped Ion Addressing with Adjoint-optimized Multimode Photonic Circuits
Melika Momenzadeh, Ke Sun, Qiming Wu +4 more·May 13, 2025
Trapped-ion quantum computing requires precise optical control for individual qubit manipulation. However, conventional free-space optics face challenges in alignment stability and scalability as the number of qubits increases. Integrated photonics o...
Addressing the Current Challenges of Quantum Machine Learning through Multi-Chip Ensembles
J. Park, Jiook Cha, Samuel Yen-Chi Chen +2 more·May 13, 2025
Practical Quantum Machine Learning (QML) is challenged by noise, limited scalability, and poor trainability in Variational Quantum Circuits (VQCs) on current hardware. We propose a multi-chip ensemble VQC framework that systematically overcomes these...
Quantum Process Tomography with Digital Twins of Error Matrices
Tangyou Huang, Akshay Gaikwad, Ilya Moskalenko +19 more·May 12, 2025
Accurate and robust quantum process tomography (QPT) is crucial for verifying quantum gates and diagnosing implementation faults in experiments aimed at building universal quantum computers. However, the reliability of QPT protocols is often compromi...
Circuit Partitioning Using Large Language Models for Quantum Compilation and Simulations
Pranav Sinha, S. Jha, Sunny Raj·May 12, 2025
We are in the midst of the noisy intermediate-scale quantum (NISQ) era, where quantum computers are limited by noisy gates, some of which are more error-prone than others and can render the final computation incomprehensible. Quantum circuit compilat...
A Pseudo-Unitary Version of Schwinger's Symbolism of Atomic Measurements and a Prospect for a New Relativistic Quantum Information Theory
J. G. Cardoso·May 10, 2025
The measurement processes that are traditionally described within the realm of non-relativistic quantum mechanics are transcribed into the covariant framework of Cartan's space, the four-valued representation space of the restricted conformal group f...
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...
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...
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...
Towards Secondary Structure Prediction of Longer Mrna Sequences Using a Quantum-Centric Optimization Scheme
Vaibhaw Kumar, Dimitris Alevras, Mihir Metkar +9 more·May 9, 2025
Accurate prediction of mRNA secondary structure is critical for understanding gene expression, translation efficiency, and advancing mRNA-based therapeutics. However, the combinatorial complexity of possible foldings, especially in long sequences, po...
Sublinear Classical-to-Quantum Data Encoding Using $n$-Toffoli Gates
Vittorio Pagni, Gary Schmiedinghoff, Kevin Lively +2 more·May 9, 2025
Quantum state preparation, also known as encoding or embedding, is a crucial initial step in many quantum algorithms and often constrains theoretical quantum speedup in fields such as quantum machine learning and linear equation solvers. One common s...
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...
Bridging Classical and Quantum Information Scrambling with the Operator Entanglement Spectrum
Ben T. McDonough, Claudio Chamon, Justin H. Wilson +1 more·May 8, 2025
Universal features of chaotic quantum dynamics underlie our understanding of thermalization in closed quantum systems and the complexity of quantum computations. Reversible automaton circuits, comprised of classical logic gates, have emerged as a tra...
A Solovay-Kitaev theorem for quantum signal processing
Z. M. Rossi·May 8, 2025
Quantum signal processing (QSP) studies quantum circuits interleaving known unitaries (the phases) and unknown unitaries encoding a hidden scalar (the signal). For a wide class of functions one can quickly compute the phases applying a desired functi...
Scalable Quantum Architecture Search via Landscape Analysis
Chenghong Zhu, Xian Wu, Hao-Kai Zhang +3 more·May 8, 2025
Balancing trainability and expressibility is a central challenge in variational quantum computing, and quantum architecture search (QAS) plays a pivotal role by automatically designing problem-specific parameterized circuits that address this trade-o...
Quantum simulation of many-body dynamics with noise-robust Trotter decomposition based on symmetric structures
Bo Yang, Naoki Negishi·May 7, 2025
The Suzuki-Trotter decomposition, which digitalizes quantum time evolution, provides a promising framework for simulating quantum dynamics on quantum hardware and exploring quantum advantage over classical computation. However, conventional Trotter c...
Approximate quadratization of high-order hamiltonians for combinatorial quantum optimization
Sabina Druagoi, Alberto Baiardi, Daniel J. Egger·May 7, 2025
Combinatorial optimization problems have wide-ranging applications in industry and academia. Quantum computers may help solve them by sampling from carefully prepared Ansatz quantum circuits. However, current quantum computers are limited by their qu...