Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Generalized quantum singular value transformation with application in quantum conjugate gradient least squares algorithm
Yu-Qiu Liu, Hefeng Wang, Hua Xiang·Aug 29, 2025
Quantum signal processing (QSP) and generalized quantum signal processing (GQSP) are essential tools for implementing the block encoding of matrix functions. The achievable polynomials of QSP have restrictions on parity, while GQSP eliminates these r...
Digital quantum simulation of many-body systems: Making the most of intermediate-scale, noisy quantum computers
Alexander Miessen·Aug 29, 2025
Quantum mechanical problems are among the hardest to simulate and, in some cases, remain intractable even for the most powerful computers. Quantum computing has emerged as a new technological platform to address such challenges, with rapid advances i...
Large time-step discretisation of adiabatic quantum dynamics
Dong An, Pedro C. S. Costa, Dominic W. Berry·Aug 29, 2025
Adiabatic quantum computing is a general framework for preparing eigenstates of Hamiltonians on quantum devices. However, its digital implementation requires an efficient Hamiltonian simulation subroutine, which may introduce extra computational over...
Accelerating Transpilation in Quantum Machine Learning with Haiqu's Rivet-transpiler
Aleksander Kaczmarek, Dikshant Dulal·Aug 29, 2025
Transpilation is a crucial process in preparing quantum circuits for execution on hardware, transforming virtual gates to match device-specific topology by introducing swap gates and basis gates, and applying optimizations that reduce circuit depth a...
Phase error estimation for passive detection setups with imperfections and memory effects
Zhiyao Wang, Devashish Tupkary, Shlok Nahar·Aug 29, 2025
We develop a generic framework to bound the phase error rate for quantum key distribution protocols using passive detection setups with imperfections and memory effects. This framework can be used in proof techniques based on the entropic uncertainty...
A Simple Method for Seniority-Zero Quantum State Preparation.
Michal Krompiec, Josh J. M. Kirsopp, Antonio M'arquez Romero +1 more·Aug 29, 2025
Quantum phase estimation (QPE), the quantum algorithm for estimating eigenvalues of a given Hermitian matrix and preparing its eigenvectors, is considered the most promising approach to finding the ground states and their energies of electronic syste...
$\Delta$-Motif: Parallel Subgraph Isomorphism via Tabular Operations
Yulun Wang, Esteban Ginez, Jamie Friel +4 more·Aug 29, 2025
Subgraph isomorphism is a fundamental problem in graph analysis that seeks to find all instances of a pattern graph within a larger data graph while preserving structural relationships. This NP-complete problem is central to domains such as biologica...
Experimental measurement of quantum-first-passage-time distributions
Joseph M. Ryan, Simon Gorbaty, Thomas J. Kessler +3 more·Aug 29, 2025
Classical First-Passage-Time Distributions (FPTDs) have been extensively studied both theoretically and experimentally. Their quantum counterparts, Quantum First-Passage-Time Distributions (QFPTDs), remain largely unexplored and have deep implication...
Communication scenario enables robust self-testing of n-party Greenberger-Horne-Zeilinger basis measurements
Barnik Bhaumik, Sagnik Ray, Debashis Saha·Aug 28, 2025
Entangled basis measurements play a crucial role in distributing quantum entanglement between parties across a quantum network. In this work, we adopt a semi-device-independent approach that enables the self-testing of n-qubit Greenberger-Horne-Zeili...
Bohr--Sommerfeld rules for systems
Simon Becker, Setsuro Fujiié, Jens Wittsten·Aug 28, 2025
We present a complete, self-contained formulation of the Bohr--Sommerfeld quantization rule for a semiclassical self-adjoint $2 \times 2$ system on the real line, arising from a simple closed curve in phase space. We focus on the case where the princ...
How many qubits does a machine learning problem require?
Sydney Leither, Michael Kubal, Sonika Johri·Aug 28, 2025
For a machine learning paradigm to be generally applicable, it should have the property of universal approximation, that is, it should be able to approximate any target function to any desired degree of accuracy. In variational quantum machine learni...
Quantum Telegraph Behavior Without Photons
Truong-Son P. Van, Daniel Maienshein, David W. Snoke·Aug 28, 2025
We show that a simple model of non-Hermitian noise gives rise to the telegraph switching behavior seen in experiments with single qubits, without any reference to the existence of photons as corpuscles. This lends support to a continuous collapse int...
Multimode rotationally symmetric bosonic codes from group-theoretic construction
Rabsan Galib Ahmed, Adithi Udupa, Giulia Ferrini·Aug 28, 2025
We introduce a new family of multi-mode, rotationally symmetric bosonic codes inspired by the group-theoretic framework of [Phys. Rev. Lett. 133, 240603 (2024)]. Such a construction inverts the traditional paradigm of code design by identifying codes...
Noise-Resilient Quantum Reinforcement Learning
Jing-Ci Yue, Jun-Hong An·Aug 28, 2025
As a branch of quantum machine learning, quantum reinforcement learning (QRL) aims to solve complex sequential decision-making problems more efficiently and effectively than its classical counterpart by exploiting quantum resources. However, in the n...
Heisenberg spin networks for realizing quantum battery with the aid of Dzyaloshinskii Moriya interaction
Suprabha Bhattacharya, Vivek Balasaheb Sabale, Atul Kumar·Aug 28, 2025
This work investigates the energy storage properties of quantum spin chains in the context of quantum batteries by introducing Heisenberg spin network models organized into different configurations, open, closed, supercube geometries, and c regular g...
Superradiant Interactions for Relic Detection with Entangled Nuclear Spins
Marios Galanis, Onur Hosten, Asimina Arvanitaki +1 more·Aug 28, 2025
We recently showed that macroscopic nuclear spin ensembles prepared in coherent spin states can dramatically enhance the interaction rates of weakly interacting cosmic relics-such as dark matter and the cosmic neutrino background-through collective q...
Optimal Work Extraction from Finite-Time Closed Quantum Dynamics
Shoki Sugimoto, Takahiro Sagawa, Ryusuke Hamazaki·Aug 28, 2025
Extracting useful work from quantum systems is a fundamental problem in quantum thermodynamics. In scenarios where rapid protocols are desired -- whether due to practical constraints or deliberate design choices -- a fundamental trade-off between pow...
Enhanced Rényi Entropy-Based Post-Quantum Key Agreement with Provable Security and Information-Theoretic Guarantees
Ruopengyu Xu, Chenglian Liu·Aug 28, 2025
This paper presents an enhanced post-quantum key agreement protocol based on Rényi entropy, addressing vulnerabilities in the original construction while preserving information-theoretic security properties. We develop a theoretical framework leverag...
Crosstalk Insensitive Trapped-Ion Entanglement through Coupling Matrix Engineering
Vikram Kashyap, Caleb Walton, Sara Mouradian·Aug 28, 2025
Optical crosstalk due to imperfect addressing in trapped-ion entangling gates generates unwanted non-local entanglement between target ions and their neighbors that is difficult to mitigate using standard quantum error correction. We present a method...
Equally entangled multiqubit states
Francisco Albarr'an-Arriagada, Guillermo Romero, J. C. Retamal·Aug 28, 2025
We present a protocol for generating multiqubit quantum states with translationally invariant pairwise entanglement, addressing the challenge posed by restricted qubit connectivity in current digital quantum computing platforms Our method relies on s...