Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Universality, Robustness, and Limits of the Eigenstate Thermalization Hypothesis in Open Quantum Systems
Gabriel Almeida, Pedro Ribeiro, Masudul Haque +1 more·Apr 14, 2025
The eigenstate thermalization hypothesis (ETH) underpins much of our modern understanding of the thermalization of closed quantum many-body systems. Here, we investigate the statistical properties of observables in the eigenbasis of the Lindbladian o...
A Practical Framework for Assessing the Performance of Observable Estimation in Quantum Simulation
Siyuan Niu, Efekan Kökcü, S. Johri +5 more·Apr 14, 2025
Simulating dynamics of physical systems is a key application of quantum computing, with potential impact in fields such as condensed matter physics and quantum chemistry. However, current quantum algorithms for Hamiltonian simulation yield results th...
PQ-CAN: A Framework for Simulating Post-Quantum Cryptography in Embedded Systems
Mauro Conti, Francesco Marchiori, Sebastiano Matarazzo +1 more·Apr 14, 2025
The rapid development of quantum computers threatens traditional cryptographic schemes, prompting the need for Post-Quantum Cryptography (PQC). Although the NIST standardization process has accelerated the development of such algorithms, their applic...
Exponentially Decaying Quantum Simulation Error with Noisy Devices
Jue Xu, Chu Zhao, Junyu Fan +1 more·Apr 14, 2025
Quantum simulation is a promising way toward practical quantum advantage, but noise in current quantum hardware poses a significant obstacle. We prove that not only the physical error but also the algorithmic error in a single Trotter step decreases ...
Quantum Image Loading: Hierarchical Learning and Block-Amplitude Encoding
H. Gharibyan, H. Karapetyan, Tigran Sedrakyan +4 more·Apr 14, 2025
Given the excitement for the potential of quantum computing for machine learning methods, a natural subproblem is how to load classical data into a quantum state. Leveraging insights from [GST24] where certain qubits play an outsized role in the ampl...
SW-TNC : Reaching the Most Complex Random Quantum Circuit via Tensor Network Contraction
Yaojian Chen, Zhaoqi Sun, Cheng Qiu +5 more·Apr 12, 2025
Classical simulation is essential in quantum algorithm development and quantum device verification. With the increasing complexity and diversity of quantum circuit structures, existing classical simulation algorithms need to be improved and extended....
Imaginary gauge potentials in a non-Hermitian spin-orbit coupled quantum gas
Junheng Tao, Emmanuel Mercado-Gutierrez, Mingshu Zhao +1 more·Apr 11, 2025
In 1996, Hatano and Nelson proposed a non-Hermitian lattice model containing an imaginary Peierls phase [Phys. Rev. Lett. 77 570-573 (1996)], which subsequent analyses revealed to be an instance of a new class of topological systems. Here, we experim...
Spin-state energetics of heme-related models with the variational quantum eigensolver
Unathi Skosana, Sthembiso Gumede, Mark Tame·Apr 11, 2025
We present numerical calculations of the energetic separation between different spin states (singlet, triplet and quintet) for a simplified model of a deoxy-myoglobin protein using the variational quantum eigensolver (VQE) algorithm. The goal is to g...
Analog Quantum Simulation of Dirac Hamiltonians in Circuit QED Using Rabi Driven Qubits
Gal Gumpel, Jiwon Kang, E. Blumenthal +3 more·Apr 11, 2025
Quantum simulators hold promise for solving many intractable problems. However, a major challenge in quantum simulation, and quantum computation in general, is to solve problems with limited physical hardware. Currently, this challenge is tackled by ...
Network requirements for distributed quantum computation
Hugo Jacinto, 'Elie Gouzien, N. Sangouard·Apr 11, 2025
Physical constraints and engineering challenges, including wafer dimensions, classical control cabling, and refrigeration volumes, impose significant limitations on the scalability of quantum computing units. As a result, a modular quantum computing ...
A Fully Planar Approach to Field-Coupled Nanocomputing: Scalable Placement and Routing Without Wire Crossings
Benjamin Hien, Marcel Walter, S. Hofmann +1 more·Apr 11, 2025
Field-coupled Nanocomputing (FCN) is a class of promising post-CMOS technologies that transmit information through electric or magnetic fields instead of current flow. They utilize basic building blocks called cells, which can form gates that impleme...
IF-QAOA: A Penalty-Free Approach to Accelerating Constrained Quantum Optimization
David Bucher, Jonas Stein, Sebastian Feld +1 more·Apr 11, 2025
Traditional methods for handling (inequality) constraints in the Quantum Approximate Optimization Ansatz (QAOA) typically rely on penalty terms and slack variables, which increase problem complexity and expand the search space. More sophisticated mix...
Parton Distribution Functions in the Schwinger model from Tensor Network States
Mari Carmen Bañuls, Krzysztof Cichy, C. -J. David Lin +1 more·Apr 10, 2025
Parton distribution functions (PDFs) describe the inner, non-perturbative structure of hadrons. Their computation involves matrix elements with a Wilson line along a direction on the light cone, posing significant challenges in Euclidean lattice calc...
Simulating quantum dynamics in two-dimensional lattices with tensor network influence functional belief propagation
Gunhee Park, J. Gray, Garnet Kin-Lic Chan·Apr 10, 2025
Describing nonequilibrium quantum dynamics remains a significant computational challenge due to the growth of spatial entanglement. The tensor network influence functional (TN-IF) approach mitigates this problem for computing the time evolution of lo...
Ground State Energy of He molecule Using a Four-Qubit Photonic Processor with the Variational Quantum Eigensolver
Badie Ghavami, Forouzan Mirmasoudi·Apr 10, 2025
To understand the properties and interactions of materials, and determining the ground state energies is one of the important challenges in quantum chemistry, materials science, and quantum mechanics, where quantum computing can play an important rol...
Advanced measurement techniques in quantum Monte Carlo: The permutation matrix representation approach
Nic Ezzell, Itay Hen·Apr 9, 2025
In a typical finite temperature quantum Monte Carlo (QMC) simulation, estimators for simple static observables such as specific heat and magnetization are known. With a great deal of system-specific manual labor, one can sometimes also derive more co...
Assumption-free fidelity bounds for hardware noise characterization
Nicolò Colombo·Apr 9, 2025
In the Quantum Supremacy regime, quantum computers may overcome classical machines on several tasks if we can estimate, mitigate, or correct unavoidable hardware noise. Estimating the error requires classical simulations, which become unfeasible in t...
Efficient mutual magic and magic capacity with matrix product states
P. S. Tarabunga, Tobias Haug·Apr 9, 2025
Stabilizer Rényi entropies (SREs) probe the non-stabilizerness (or “magic”) of many-body systems and quantum computers. Here, we introduce the mutual von-Neumann SRE and magic capacity, which can be efficiently computed in time O(N\chi^3)O(Nχ3) for m...
Characterising the failure mechanisms of error-corrected quantum logic gates
Robin Harper, C. Lain'e, Evan T. Hockings +4 more·Apr 9, 2025
Mid-circuit measurements used in quantum error correction are essential in quantum computer architecture, as they read out syndrome data and drive logic gates. Here, we use a heavy-hex code prepared on a superconducting qubit array to investigate how...
Functional matrix product state simulation of continuous variable quantum circuits
Andreas Bock Michelsen, Frederik K. Marqversen, Michael Kastoryano·Apr 8, 2025
We introduce a functional matrix product state (FMPS) based method for simulating the real-space representation of continuous-variable (CV) quantum computation. This approach efficiently simulates non-Gaussian CV systems by leveraging their functiona...