Papers

Jeongho Bang·Apr 2, 2026

Single-shot measurement learning (SSML) learns a compensation unitary from a one-bit success/failure record and halts after a prescribed run of consecutive successes. We recast SSML as an adaptive estimator on a parameterized sensing manifold and ask...

Zhengfeng Ji, Tongyang Li, Changpeng Shao +2 more·Apr 2, 2026

We study the computational complexity of estimating the normalized trace $2^{-n}Tr[f(A)]$ for a log-local Hamiltonian $A$ acting on $n$ qubits. This problem arises naturally in the DQC1 model, yet its complexity is only understood for a limited class...

C. A. S. Almeida·Apr 2, 2026

Topological phase transitions in generic multiband systems are mediated by band-touching defects whose codimension -- the number of momentum directions along which the gap closes linearly -- varies across universality classes. Although singular behav...

Diego Roldan·Apr 2, 2026

Let $G$ be a strongly regular graph of prime order $p$ with connection degree $k \geq 6$. We prove that the \emph{quantum walk characteristic polynomial} $χ_q(G,λ) \coloneqq \det(λI - U_G)$, where $U_G$ is the coined quantum walk operator on $G$, com...

Abhinash Kumar Roy, Varun Srivastava, Christina Giarmatzi +1 more·Apr 1, 2026

Characterising multi-time quantum processes is essential for analysing temporally correlated noise and for designing effective control and mitigation strategies. A complete operational description through multi-time process tomography requires an inf...

Chaobin Liu·Apr 1, 2026

We introduce a twisted fiber-bundle construction of quantum CSS codes over group algebras \(R=\mathbb F_2[G]\), where each base generator carries a generator-dependent \(R\)-linear fiber twist satisfying a flatness condition. This construction extend...

Maxwell West, Frederic Sauvage, Aniruddha Sen +6 more·Apr 1, 2026

Classical shadows (CS) has recently emerged as an important framework to efficiently predict properties of an unknown quantum state. A common strategy in CS protocols is to parametrize the basis in which one measures the state by a random group actio...

Tong Shen, Zeru Zhu, Ji Liu·Apr 1, 2026

This paper develops a distributed variational quantum algorithm for solving large-scale linear equations. For a linear system of the form $Ax=b$, the large square matrix $A$ is partitioned into smaller square block submatrices, each of which is known...

Eric Culf, Josse van Dobben de Bruyn, Peter Zeman·Apr 1, 2026

Commutativity gadgets provide a technique for lifting classical reductions between constraint satisfaction problems to quantum-sound reductions between the corresponding nonlocal games. We develop a general framework for commutativity gadgets in the ...

Griffin Pitts, Kimia Fazeli, Tirth Bhatt +5 more·Apr 1, 2026

As AI becomes more common in students' everyday experiences, a major challenge for K-12 AI education is designing learning experiences that can be meaningfully integrated into existing subject-area instruction. This paper presents the design and impl...

Colin Campbell, Rich Rines, Victory Omole +6 more·Apr 1, 2026

Resource estimation is a significant challenge in evaluating fault tolerant quantum computers. Existing approaches often rely on either fixed architectural assumptions or coarse analytical models that fail to capture the interaction between hardware ...

Jacek Gosciniak·Apr 1, 2026

General-purpose programmable photonic processors offer a flexible foundation for integrating various functionalities within a single chip. A two-dimensional hexagonal waveguide mesh of Mach Zehnder interferometers has been shown to have great potenti...

Frederic Koehler, Pui Kuen Leung·Apr 1, 2026

We study algorithms for approximating the permanent of a random matrix when the entries are slightly biased away from zero. This question is motivated by the goal of understanding the classical complexity of linear optics and \emph{boson sampling} (A...

A. E. Teretenkov·Apr 1, 2026

We construct a broad class of completely positive maps and Go\-rini--Kossakowski--Sudarshan-Lindblad generators for fermionic systems induced by linear transformations of system and environment modes. For these maps, we derive explicit Heisenberg-pic...

Budhaditya Bhattacharjee, William. E. Salazar, Alexei Andreanov +1 more·Apr 1, 2026

We present an exact solution in the large-$N$ limit of the Lévy Sachdev-Ye-Kitaev (LSYK) model introduced in Ref. [1], wherein the couplings are drawn from a Lévy Stable distribution parameterized by a tail exponent $μ\in [0, 2]$. Starting from the H...

Bo Xing, Jesús G. Parejo, Sofía Martínez-Garaot +2 more·Apr 1, 2026

Achieving fast, excitation-free quantum control is a vital challenge in modern quantum technologies. In many cases, shortcuts to adiabaticity enable fast adiabatic-like protocols, yet determining control parameters that satisfy practical constraints ...

Chen Bai, Zihan Zhou, Bastien Lapierre +1 more·Apr 1, 2026

Symmetries play a central role in quantum many-body physics, yet uncovering them systematically remains challenging. We introduce a bootstrap framework designed to reconstruct the representation theory of hidden finite group symmetries of quantum man...

Lorenz Wanckel, André Eckardt·Apr 1, 2026

Floquet engineering, the control of a quantum system by means of time-periodic driving, allows to modify the properties of the system so that it becomes described by an approximate effective time-independent Hamiltonian. However, in the presence of i...

Hyeongjin Kim, Souvik Bandyopadhyay, Anatoli Polkovnikov·Apr 1, 2026

We reveal a correspondence between temperature and integrability-breaking in classical and quantum many-body systems through the lens of geometry and adiabatic transformations. Decreasing the temperature, obtained in a standard way through the deriva...

Aisling Mac Aree, Mark Howard·Apr 1, 2026

An important measure of utility for a quantum code is the identification of which logical operations can be implemented fault-tolerantly on its codespace. We introduce a framework which leverages the automorphism groups of associated classical codes,...