Papers
Live trends in quantum computing research, updated daily from arXiv.
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Higher-Dimensional Information Lattice: Quantum State Characterization through Inclusion-Exclusion Local Information
Ian Matthias Flór, Claudia Artiaco, Thomas Klein Kvorning +1 more·Dec 23, 2025
We generalize the information lattice, originally defined for one-dimensional open-boundary chains, to characterize quantum many-body states in higher-dimensional geometries. In one dimension, the information lattice provides a position- and scale-re...
Coexistence of Anderson Localization and Quantum Scarring in Two Dimensions
Fartash Chalangari, Anant Vijay Varma, Joonas Keski-Rahkonen +1 more·Dec 23, 2025
We investigate finite two-dimensional disordered systems with periodic confinement. At low energies, eigenstates exhibit strong Anderson localization, while at higher energies a subset of states exhibits variational scarring with anisotropic intensit...
Quantum Universality in Composite Systems: A Trichotomy of Clifford Resources
Alejandro Borda, Julian Rincon, César Galindo·Dec 23, 2025
The Clifford group is efficiently classically simulable, and universality is obtained by supplementing it with non-Clifford resources. We determine which single-qudit gates suffice to achieve universality. We show that the structure of such resources...
Horizons and Soft Quantum Information
Daine L. Danielson, Gautam Satishchandran·Dec 23, 2025
It was recently shown that black holes decohere any quantum superpositions in their vicinity. This decoherence is mediated by soft radiation through the horizon, and can be understood as the result of the fact that quantum states in the exterior sour...
Systematic Construction of Time-Dependent Hamiltonians for Microwave-Driven Josephson Circuits
Yao Lu, Tianpu Zhao, André Vallières +13 more·Dec 23, 2025
Time-dependent electromagnetic drives are fundamental for controlling complex quantum systems, including superconducting Josephson circuits. In these devices, accurate time-dependent Hamiltonian models are imperative for predicting their dynamics and...
Probing Stringy Horizons with Pole-Skipping in Non-Maximal Chaotic Systems
Ping Gao, Hong Liu·Dec 23, 2025
In this paper, we study pole-skipping in non-maximally quantum chaotic systems. Using Rindler conformal field theories and the large-$q$ SYK chain as illustrative examples, we argue that the pole-skipping points of few-body operators organize into tr...
Simulating fermionic fractional Chern insulators with infinite projected entangled-pair states
Hao Chen, Titus Neupert, Juraj Hasik·Dec 23, 2025
Infinite projected entangled-pair states (iPEPS) provide a powerful variational framework for two-dimensional quantum matter and have been widely used to capture bosonic topological order, including chiral spin liquids. Here we extend this approach t...
Tunably realizing flat-bands and exceptional points in kinetically frustrated systems: An example on the non-Hermitian Creutz ladder
Debashish Dutta, Sayan Choudhury·Dec 23, 2025
We study a non-Hermitian extension of the Creutz ladder with generic non-reciprocal hopping. By mapping the ladder onto two decoupled non-Hermitian Su--Schrieffer--Heeger (SSH) chains, we uncover a rich structure in parameter space under different bo...
Variational (matrix) product states for combinatorial optimization
Guillermo Preisser, Conor Mc Keever, Michael Lubasch·Dec 23, 2025
To compute approximate solutions for combinatorial optimization problems, we describe variational methods based on the product state (PS) and matrix product state (MPS) ansatzes. We perform variational energy minimization with respect to a quantum an...
Single-LED-pumped, room-temperature, solid-state maser
Michael Newns, Shirley Xu, Mingyang Liu +5 more·Dec 23, 2025
Through their ability to achieve cryogenic levels of noise performance while operating at room temperature, optically-pumped, solid-state (OPSS) masers show great promise as quantum sensors, oscillators, and amplifiers. We here demonstrate maser osci...
Revealing Electron-Ytterbium Interactions through Rydberg Molecular Spectroscopy
Tangi Legrand, Xin Wang, Milena Simić +5 more·Dec 23, 2025
Divalent atoms have emerged as powerful alternatives to alkalis in ultracold atom platforms, offering unique advantages arising from their two-electron structure. Among these species, ytterbium (Yb) is especially promising, yet its anionic properties...
Rényi-like entanglement probe of the chiral central charge
Julian Gass, Michael Levin·Dec 23, 2025
We propose a ground state entanglement probe for gapped, two-dimensional quantum many-body systems that involves taking powers of reduced density matrices in a particular geometric configuration. This quantity, which we denote by $ω_{α,β}$, is parame...
Coexistence of distinct Discrete Time-Crystalline orders in the Floquet Lipkin-Meshkov-Glick model
Shashank Mishra, Sayan Choudhury·Dec 23, 2025
We examine the distinct discrete time crystals (DTCs) that emerge in the Lipkin-Meshkov-Glick model, subjected to spatially nonuniform periodic driving. Intriguingly, we demonstrate that by appropriately tailoring the drive protocol, distinct DTC ord...
Random Stinespring superchannel: converting channel queries into dilation isometry queries
Filippo Girardi, Francesco Anna Mele, Haimeng Zhao +2 more·Dec 23, 2025
The recently introduced random purification channel, which converts $n$ copies of an arbitrary mixed quantum state into $n$ copies of the same uniformly random purification, has emerged as a powerful tool in quantum information theory. Motivated by t...
Certified Lower Bounds and Efficient Estimation of Minimum Accuracy in Quantum Kernel Methods
Demerson N. Gonçalves, Tharso D. Fernandes, Andrias M. M. Cordeiro +2 more·Dec 23, 2025
The minimum accuracy heuristic evaluates quantum feature maps without requiring full quantum support vector machine (QSVM) training. However, the original formulation is computationally expensive, restricted to balanced datasets, and lacks theoretica...
Quantum Gates from Wolfram Model Multiway Rewriting Systems
Furkan Semih Dündar, Xerxes D. Arsiwalla, Hatem Elshatlawy·Dec 23, 2025
We show how representations of finite-dimensional quantum operators can be constructed using nondeterministic rewriting systems. In particular, we investigate Wolfram model multiway rewriting systems based on string substitutions. Multiway systems we...
Classification using quantum kernels in a radial basis function network
Emily Micklethwaite, Adam Lowe·Dec 23, 2025
Radial basis function (RBF) networks are expanded to incorporate quantum kernel functions enabling a new type of hybrid quantum-classical machine learning algorithm. Using this approach, synthetic examples are introduced which allow for proof of conc...
Hardware-aware and Resource-efficient Circuit Packing and Scheduling on Trapped-Ion Quantum Computers
Miguel Palma, Shuwen Kan, Wenqi Wei +4 more·Dec 23, 2025
The rapid expansion of quantum cloud services has led to long job queues due to single-tenant execution models that underutilize hardware resources. Quantum multi-programming (QMP) mitigates this by executing multiple circuits in parallel on a single...
Experimental characterization of the Toffoli gate via channel spectrum benchmarking
D. K. Korliakov, B. I. Bantysh, A. S. Borisenko +2 more·Dec 23, 2025
Channel spectrum benchmarking (CSB) provides a robust framework for characterizing quantum gate fidelities while remaining insensitive to state preparation and measurement (SPAM) errors. Yet, current CSB implementations encounter fundamental challeng...
Quantum State Preparation via Schmidt Spectrum Optimisation
Josh Green, Joshua Snow, Jingbo B Wang·Dec 23, 2025
We introduce an efficient algorithm for the systematic design of shallow-depth quantum circuits capable of preparing many-body quantum states represented as Matrix Product States (MPS). The proposed method leverages Schmidt spectrum optimization (SSO...