Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Mitigating decoherence in molecular spin qudits
Leonardo Ratini, G. Sansone, E. Garlatti +3 more·Apr 8, 2025
Molecular nanomagnets are quantum spin systems potentially serving as qudits for future quantum technologies thanks to their many accessible low-energy states. At low temperatures, the primary source of error in these systems is pure dephasing, cause...
Shot noise signatures of candidate states for the fractional quantum Hall <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ν</mml:mi><mml:mo>=</mml:mo><mml:mfrac><mml:mn>12</mml:mn><mml:mn>5</mml:mn></mml:mfrac></mml:mrow></mml:math> state
Goutham Vinjamuri, Ankur Das·Apr 8, 2025
Fractional quantum Hall (FQH) states are highly sought after because of their ability to host non-abelian anyons, whose braiding statistics make them excellent candidates for qubits in topological quantum computing. Multiple theoretical studies on th...
Entangling quantum memories over 420 km in fiber
Xi-Yu Luo, Chao-Yang Wang, Mingjuan Zheng +17 more·Apr 8, 2025
Long-distance entanglement is pivotal for quantum communication, distributed quantum computing and sensing. Significant progresses have been made in extending the distribution distance of entangled photons, either in free space or fiber. For future q...
Continuous-Variable Quantum Key Distribution with Composable Security and Tight Error Correction Bound for Constrained Devices
Panagiotis Papanastasiou, C. Ottaviani, S. Pirandola +2 more·Apr 8, 2025
Constrained devices, such as smart sensors, wearable devices, and Internet of Things nodes, are increasingly prevalent in society and rely on secure communications to function properly. These devices often operate autonomously, exchanging sensitive d...
AriaQuanta: A Quantum Software for Quantum Computing
A. Cheraghi, H. Yeganeh·Apr 8, 2025
We introduce AriaQuanta, a powerful and flexible tool for designing, simulating, and implementing quantum circuits. This open-source software is designed to make it easy for users of all experience levels to learn and use quantum computing. The first...
Cryptomania v.s. Minicrypt in a Quantum World
Longcheng Li, Qian Li, X. Li +1 more·Apr 8, 2025
We prove that it is impossible to construct perfect-complete quantum public-key encryption (QPKE) with classical keys from quantumly secure one-way functions (OWFs) in a black-box manner, resolving a long-standing open question in quantum cryptograph...
New designs of linear optical interferometers with minimal depth and component count
Timothée Goubault de Brugière, R. Mezher, S. Currie +1 more·Apr 8, 2025
We adapt an algorithm for CNOT circuits synthesis based on the Bruhat decomposition to the design of linear optical circuits with Mach-Zehnder interferometers (MZI). The synthesis algorithm reduces to designing sorting networks with nearest neighbor ...
Solving General QUBOs with Warm-Start QAOA via a Reduction to Max-Cut
Bikrant Bhattachayra, Michael Capriotti, Reuben Tate·Apr 8, 2025
The Quantum Approximate Optimization Algorithm (QAOA) is a quantum algorithm that finds approximate solutions to problems in combinatorial optimization, especially those that can be formulated as a Quadratic Unconstrained Binary Optimization (QUBO) p...
Quantum Combine and Conquer and Its Applications to Sublinear Quantum Convex Hull and Maxima Set Construction
Shion Fukuzawa, M. Goodrich, Sandy Irani·Apr 8, 2025
We introduce a quantum algorithm design paradigm called combine and conquer, which is a quantum version of the"marriage-before-conquest"technique of Kirkpatrick and Seidel. In a quantum combine-and-conquer algorithm, one performs the essential comput...
Evaluating Mutation Techniques in Genetic-Algorithm-Based Quantum Circuit Synthesis
Michael Kölle, Tom Bintener, Maximilian Zorn +4 more·Apr 8, 2025
Quantum computing leverages the unique properties of qubits and quantum parallelism to solve problems intractable for classical systems, offering unparalleled computational potential. However, optimization of quantum circuits remains critical, especi...
Realization and Calibration of Continuously Parameterized Two-Qubit Gates on a Trapped-Ion Quantum Processor
C. Yale, Ashlyn D. Burch, Matthew N. H. Chow +5 more·Apr 8, 2025
Continuously parameterized two-qubit gates are a key feature of state-of-the-art trapped-ion quantum processors, as they have favorable error scalings and show distinct improvements in circuit performance over more restricted maximally entangling gat...
Binary Tree Block Encoding of Classical Matrix
Zexian Li, Xiao-Ming Zhang, Chunlin Yang +1 more·Apr 8, 2025
State preparation and block encoding are essential subroutines in quantum computing. The former provides basic encoding of quantum states, while the latter transforms classical data into a matrix representation within a quantum circuit. Some quantum ...
Scalable low-latency entanglement distribution for distributed quantum computing
Jiapeng Zhao, Yang Xu, Xiyuan Lu +5 more·Apr 7, 2025
Practical distributed quantum computing and error correction require quantum networks with high-qubit-rate, high-fidelity, and low-reconfiguration-latency. Unfortunately, current approaches are limited by fundamental constraints: single-channel entan...
Fast and direct preparation of a genuine lattice BEC via the quantum Mpemba effect
Philipp Westhoff, Sebastian Paeckel, Mattia Moroder·Apr 7, 2025
We demonstrate that dissipative state preparation protocols in many-body systems can be substantially accelerated via the quantum Mpemba effect. Our approach exploits weak symmetries to analytically identify a class of simple, experimentally-realizab...
Group Order is in QCMA
François Le Gall, Harumichi Nishimura, Dhara Thakkar·Apr 7, 2025
In this work, we show that verifying the order of a finite group given as a black-box is in the complexity class QCMA. This solves an open problem asked by Watrous in 2000 in his seminal paper on quantum proofs and directly implies that the Group Non...
Inter-species topological phases via a dynamical gauge field
Zhoutao Lei, Linhu Li·Apr 7, 2025
We uncover a class of inter-species topological phases in a one-dimensional lattice, loaded with two species of non-identical particles interacting via a dynamical gauge field (DGF). Two types of topological states are found to emerge from different ...
Neutrino Oscillations as a Probe of Macrorealism
Kathrine Mørch Groth, Johann Ioannou-Nikolaides, D. Jason Koskinen +1 more·Apr 7, 2025
The correlations between successive measurements of a quantum system can violate a family of Leggett-Garg Inequalities (LGIs) that are analogous to the violation of Bell's inequalities of measurements performed on spatially separated quantum systems....
Direct Measurement of the Singlet Lifetime and Photoexcitation Behavior of the Boron Vacancy Center in Hexagonal Boron Nitride
Richard A. Escalante, Andrew J. Beling, Daniel G. Ang +9 more·Apr 7, 2025
Optically active spin defects in van der Waals (vdW) materials are a promising platform for quantum sensing, potentially enabling shorter standoff distances than defects in diamond and thus improved measurement signal-to-noise ratio (SNR) and spatial...
Measuring Rényi entropy using a projected Loschmidt echo
Yi-Neng Zhou, Robin Löwenberg, Julian Sonner·Apr 7, 2025
We present efficient and practical protocols to measure the second Rényi entropy (RE), whose exponential is known as the purity. We achieve this by establishing a direct connection to a Loschmidt echo (LE) type measurement sequence, applicable to qua...
Frustrated Rydberg Atom Arrays Meet Cavity-QED: Emergence of the Superradiant Clock Phase
Ying Liang, Bao-Yun Dong, Zi-Jian Xiong +1 more·Apr 7, 2025
Rydberg atom triangular arrays in an optical cavity serve as an ideal platform for understanding the interplay between geometric frustration and quantized photons. Using a large-scale quantum Monte Carlo method, we obtain a rich ground state phase di...