Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Solvable Quantum Circuits from Spacetime Lattices
Michael A. Rampp, Suhail A. Rather, Pieter W. Claeys·Dec 17, 2025
In recent years dual-unitary circuits and their multi-unitary generalizations have emerged as exactly solvable yet chaotic models of quantum many-body dynamics. However, a systematic picture for the solvability of multi-unitary dynamics remains missi...
Classifying one-dimensional Floquet phases through two-dimensional topological order
Campbell McLauchlan, Vedant Motamarri, Benjamin Béri·Dec 17, 2025
Floquet systems display rich phenomena, such as time crystals, with many-body localisation (MBL) protecting the phases from heating. While several types of Floquet phases have been classified, a unified picture of Floquet MBL is still emerging. Stati...
Lanczos Meets Orthogonal Polynomials
Le-Chen Qu·Dec 17, 2025
We establish a direct correspondence between the Lanczos approach and the orthogonal polynomials approach in random matrix theory. In the large-$N$ and continuum limits, the average Lanczos coefficients and the recursion coefficients become equivalen...
Large Isolated Stripes on Short 18-leg $t$-$J$ Cylinders
Tizian Blatz, Sebastian Paeckel, Ulrich Schollwöck +2 more·Dec 17, 2025
Spin-charge stripes belong to the most prominent low-temperature orders besides superconductivity in high-temperature superconductors. This phase is particularly challenging to study numerically due to finite-size effects. By investigating the format...
An introduction to nonlinear fiber optics and optical analogues to gravitational phenomena
Dimitrios Kranas, Andleeb Zahra, Friedrich König·Dec 17, 2025
The optical fiber is a revolutionary technology of the past century. It enables us to manipulate single modes in nonlinear interactions with precision at the quantum level without involved setups. This setting is useful in the field of analogue gravi...
Efficient Simulation of Sparse, Non-Local Fermion Models
Reinis Irmejs, J. Ignacio Cirac·Dec 17, 2025
Efficient simulation of interacting fermionic systems is a key application of near-term quantum computers, but is hindered by the overhead required to encode fermionic operators on qubit hardware. Here, we consider models with $N$ fermionic modes in ...
A random purification channel for arbitrary symmetries with applications to fermions and bosons
Michael Walter, Freek Witteveen·Dec 17, 2025
The random purification channel maps n copies of any mixed quantum state to n copies of a random purification of the state. We generalize this construction to arbitrary symmetries: for any group G of unitaries, we construct a quantum channel that map...
Error mitigation for logical circuits using decoder confidence
Maria Dincă, Tim Chan, Simon C. Benjamin·Dec 17, 2025
Fault-tolerant quantum computers use decoders to monitor for errors and find a plausible correction. A decoder may provide a decoder confidence score (DCS) to gauge its success. We adopt a swim distance DCS, computed from the shortest path between sy...
Combinatorial structures in quantum correlation: A new perspective
Rohit kumar, Satyabrata Adhikari·Dec 17, 2025
Graph-theoretic structures play a central role in the description and analysis of quantum systems. In this work, we introduce a new class of quantum states, called $A_α$-graph states, which are constructed from either unweighted or weighted graphs by...
Low-Latency FPGA Control System for Real-Time Neural Network Processing in CCD-Based Trapped-Ion Qubit Measurement
Binglei Lou, Gautham Duddi Krishnaswaroop, Filip Wojcicki +5 more·Dec 17, 2025
Accurate and low-latency qubit state measurement is critical for trapped-ion quantum computing. While deep neural networks (DNNs) have been integrated to enhance detection fidelity, their latency performance on specific hardware platforms remains und...
Prospects for quantum advantage in machine learning from the representability of functions
Sergi Masot-Llima, Elies Gil-Fuster, Carlos Bravo-Prieto +2 more·Dec 17, 2025
Demonstrating quantum advantage in machine learning tasks requires navigating a complex landscape of proposed models and algorithms. To bring clarity to this search, we introduce a framework that connects the structure of parametrized quantum circuit...
All Entangled States are Nonlocal and Self-Testable in the Broadcast Scenario
Pavel Sekatski, Jef Pauwels·Dec 17, 2025
Entanglement and Bell nonlocality are known to be inequivalent: there exist entangled states that admit a local hidden-variable model for all local measurements. Here we show that this gap disappears in a minimal broadcast extension of the Bell scena...
Characterization of Generalized Coherent States through Intensity-Field Correlations
Ignacio Salinas Valdivieso, Victor Gondret, Gerd Hartmann S. +3 more·Dec 17, 2025
Non-Gaussian quantum states of light are essential resources for quantum information processing and precision metrology. Among them, generalized coherent states (GCS), which naturally arise from the evolution of a coherent state with a nonlinear medi...
Optimization Techniques in Quantum Information
Benjamin Desef·Dec 17, 2025
This thesis focuses on the intersection of mathematical and computational optimization and quantum information. Main contributions are open-source software code: A hybrid approach mixing "traditional" nonconvex and convex methods can make difficult p...
Implementation of the Quantum Fourier Transform on a molecular qudit with full refocusing and state tomography
Marcos Rubín-Osanz, Laura Bersani, Simone Chicco +7 more·Dec 17, 2025
Molecular spin qudits based on lanthanide complexes offer a promising platform for quantum technologies, combining chemical tunability with multi-level encoding. However, experimental demonstrations of their envisaged capabilities remain scarce, posi...
Quadratic power enhancement in extended Dicke quantum battery
Harsh Sharma, Himadri Shekhar Dhar·Dec 17, 2025
We demonstrate a quadratic enhancement of power in a battery consisting of $N$ two-level systems or spins interacting with two photonic cavity modes, where one of the modes is in the dispersive regime. In contrast to Dicke batteries, the power enhanc...
First-principles simulation of spin diffusion in static solids using dynamic mean-field theory
Timo Gräßer, Götz S. Uhrig, Matthias Ernst·Dec 17, 2025
The dynamics of disordered nuclear spin ensembles are the subject of nuclear magnetic resonance studies. Due to the through-space long-range dipolar interaction generically many spins are involved in the time evolution, so that exact brute force calc...
Photonics-Enhanced Graph Convolutional Networks
Yuan Wang, Oleksandr Kyriienko·Dec 17, 2025
Photonics can offer a hardware-native route for machine learning (ML). However, efficient deployment of photonics-enhanced ML requires hybrid workflows that integrate optical processing with conventional CPU/GPU based neural network architectures. He...
Anomalous Dynamical Scaling at Topological Quantum Criticality
Menghua Deng, Sheng Yang, Chen Sun +2 more·Dec 17, 2025
We study the nonequilibrium driven dynamics at topologically nontrivial quantum critical points (QCPs), and find that topological edge modes at criticality give rise to anomalous dynamical scaling behavior. By analyzing the driven dynamics of bulk an...
Decoherence dynamics across sub-Planckian to arbitrary scales using kitten states
Naeem Akhtar, Jia-Xin Peng, Tan Hailin +2 more·Dec 17, 2025
Environmental decoherence occurs when a quantum system interacts with its surroundings, progressively reducing quantum interference and coherence, complicating the preservation of critical quantum properties over time, especially during experimental ...