Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
k-Uniform complete hypergraph states stabilizers in terms of local operators
Gabriel M. Arantes, Vinícius Salem, Danilo Cius +1 more·Nov 19, 2025
In this work, we present a novel method to express the stabilizer of a k-uniform complete hypergraph state as a linear combination of local operators. Quantum hypergraph states generalize graph states and exhibit properties that are not shared by the...
Cyclone: Designing Efficient and Highly Parallel QCCD Architectural Codesigns for Fault Tolerant Quantum Memory
Sahil Khan, Abhinav Anand, Kenneth R. Brown +1 more·Nov 19, 2025
Modular trapped-ion quantum computing hardware, known as QCCDs require shuttling operations in order to maintain effective all-to-all connectivity. Each module or trap can perform only one operation at a time, resulting in low intra-trap parallelism,...
Nonclassicality of a Macroscopic Qubit-Ensemble via Parity Measurement Induced Disturbance
Lorenzo Braccini, Debarshi Das, Ben Zindorf +3 more·Nov 19, 2025
We propose an experimental scheme to test the nonclassicality of a macroscopic ensemble of qubits, through the violation of the classical notion of macrorealism (MR) via the fundamental measurement-induced disturbance of quantum systems. An electroma...
How "Quantum" is your Quantum Computer? Macrorealism-based Benchmarking via Mid-Circuit Parity Measurements
Ben Zindorf, Lorenzo Braccini, Debarshi Das +1 more·Nov 19, 2025
To perform meaningful computations, Quantum Computers (QCs) must scale to macroscopic levels - i.e., to a large number of qubits - an objective pursued by most quantum companies. How to efficiently test their quantumness at these scales? We show that...
Mixed state tomography reduces to pure state tomography
Angelos Pelecanos, Jack Spilecki, Ewin Tang +1 more·Nov 19, 2025
A longstanding belief in quantum tomography is that estimating a mixed state is far harder than estimating a pure state. This is borne out in the mathematics, where mixed state algorithms have always required more sophisticated techniques to design a...
Engineering multi-mode bosonic squeezed states using Monte-Carlo optimization
Jieqiu Shao, Diego A. R. Dalvit, Lukasz Cincio +1 more·Nov 19, 2025
Bosonic systems, such as photons and ultracold atoms, have played a central role in demonstrating quantum-enhanced sensing. Quantum entanglement, through squeezed and GHZ states, enables sensing beyond classical limits. However, such a quantum advant...
Floquet Bosonic Kitaev Chain
Raditya Weda Bomantara·Nov 19, 2025
We propose a class of periodically driven (Hermitian) modified bosonic Kitaev chains that effectively hosts rich nonHermitian Floquet topological phenomena. Two particular models are investigated in details as case studies. The first of these represe...
Quantum-Assisted Graph Domination Games
C. Weeks, P. Strange, P. Drmota +1 more·Nov 19, 2025
We study quantum advantage in the 1-step graph domination game on cycle graphs numerically, analytically and through the use of Noisy intermediate scale quantum (NISQ) processors. We find explicit strategies that realise the recently found upper boun...
Explicit Connections Between Krylov and Nielsen Complexity
Ben Craps, Gabriele Pascuzzi, Juan F. Pedraza +2 more·Nov 19, 2025
We establish a direct correspondence between Krylov and Nielsen complexity by choosing the Krylov basis to be part of the elementary gate set of Nielsen geometry and selecting a Nielsen complexity metric compatible with the Krylov metric. Up to norma...
Automorphism in Gauge Theories: Higher Symmetries and Transversal Non-Clifford Logical Gates
Po-Shen Hsin, Ryohei Kobayashi·Nov 19, 2025
Gauge theories are important descriptions for many physical phenomena and systems in quantum computation. Automorphism of gauge group naturally gives global symmetries of gauge theories. In this work we study such symmetries in gauge theories induced...
Real-time Scattering in φ^4 Theory using Matrix Product States
Bahaa Al Sayegh, Wissam Chemissany·Nov 19, 2025
We investigate the critical behavior and real-time scattering dynamics of the interacting $φ^4$ quantum field theory in (1+1)-dimensions using uniform matrix product states (uMPS) and the time-dependent variational principle (TDVP). A finite-entangle...
Quantum measurement tomography with mini-batch stochastic gradient descent
Akshay Gaikwad, Manuel Sebastian Torres, Anton Frisk Kockum·Nov 19, 2025
Drawing inspiration from gradient-descent methods developed for data processing in quantum state tomography [\href{https://iopscience.iop.org/article/10.1088/2058-9565/ae0baa}{Quantum Sci.~Technol.~\textbf{10} 045055 (2025)}] and quantum process tomo...
Efficient quantum state preparation of multivariate functions using tensor networks
Marco Ballarin, Juan José García-Ripoll, David Hayes +1 more·Nov 19, 2025
For the preparation of high-dimensional functions on quantum computers, we introduce tensor network algorithms that are efficient with regard to dimensionality, optimize circuits composed of hardware-native gates and take gate errors into account dur...
Exponential Suppression of Transport in Electric Quantum Walks
Houssam Abdul-Rahman, Christopher Cedzich, Günter Stolz +1 more·Nov 19, 2025
We establish exact scalings for the maximal group velocity of translation-invariant quantum walks in periodic electric fields. Our main result shows that the maximal group velocity decays exponentially with the period of the field in the whole parame...
Phase evolution of superposition target states in adiabatic population transfer
Eli Morhayim, Michael T. Ziemba, J. Lim +1 more·Nov 19, 2025
We consider stimulated Raman adiabatic passage (STIRAP) when the final state is a superposition of two non-degenerate states. The system consists of four states coupled by two light fields. We find the relative phase of the final superposition depend...
Navigating Quantum Missteps in Agent-Based Modeling: A Schelling Model Case Study
C. Nico Barati, Arie Croitoru, Ross Gore +5 more·Nov 19, 2025
Quantum computing promises transformative advances, but remains constrained by recurring misconceptions and methodological pitfalls. This paper demonstrates a fundamental incompatibility between traditional agent-based modeling (ABM) implementations ...
Gleason's Theorem for a Qubit as Part of a Composite System
Vincenzo Fiorentino, Stefan Weigert·Nov 19, 2025
We extend Gleason's theorem to the two-dimensional Hilbert space of a qubit by invoking the standard axiom that describes composite quantum systems. The tensor-product structure allows us to derive density matrices and Born's rule for $d=2$ from a si...
The impact of multimode sources on DLCZ type quantum repeaters
Emil R. Hellebek, Anders S. Sørensen·Nov 19, 2025
Long distance entanglement generation at a high rate is a major quantum technological goal yet to be fully realized, with the promise of many interesting applications, such as secure quantum computing on remote servers and quantum cryptography. One p...
QTIS: A QAOA-Based Quantum Time Interval Scheduler
José A. Tirado-Domínguez, Eladio Gutiérrez, Oscar Plata·Nov 19, 2025
Task scheduling with constrained time intervals and limited resources remains a fundamental challenge across domains such as manufacturing, logistics, cloud computing, and healthcare. This study presents a novel variant of the Quantum Approximate Opt...
Experimental demonstration of non-local magic in a superconducting quantum processor
Halima Giovanna Ahmad, Gianluca Esposito, Viviana Stasino +9 more·Nov 19, 2025
Magic is a non-classical resource whose efficient manipulation is fundamental to advancing efficient and scalable fault-tolerant quantum computing. Quantum advantage is possible only if both magic and entanglement are present. Of particular interest ...