Momentum-resolved quantum noise spectroscopy using ensembles of diamond quantum sensorsSpatiotemporal fluctuations across multiple scales govern and characterize the emergent properties, phase boundaries, and low-energy excitations of strongly correlated matter. However, capturing…Zeeshawn Kazi, Kai-Hung Cheng, Jared Rovny et al.·Sep 9, 2026SaveLearn
From Certifying Rank k Projectors To Non-Positivity, Entanglement, And Non-Hermitian Witnesses Through Traces Of Matrix PowersWe all know that a density matrix ρ is pure if and only if Tr \,ρ2 = 1. But is this the only way to prove the purity of ρ using the trace of its powers? Here I systematically study…H. F. Chau·Sep 9, 2026SaveLearn
Sub-extensive non-stabilizerness in the Dyck-Fredkin spin chainThe stabilizer Rényi entropy is a quantitative measure of non-stabilizerness, or magic, and has typically been found to scale extensively with system size N (i.e., Θ(N)) for a variety of…Yasunori Lee·Sep 9, 2026SaveLearn
Tracing the Loop: Non-Causal Computation, Partial Traces, & Postselected EntanglementThis paper gives a categorical interpretation of Baumeler \& Wolf's logically consistent non-causal circuits, connecting them to postselected quantum teleportation. Looped feedback is represented…Mark Carney·Sep 9, 2026SaveLearn
When Measurement Constraints Favor Quantum Computational Sensing for Stealthy Power-Grid Attack DetectionPower-grid defenses that rely on digital telemetry remain vulnerable to stealthy attacks that preserve plausible reported states while altering the underlying physical system. We study when…Saisubramaniam Gopalakrishnan, Supreeth B S, Pranav Sarda et al.·Sep 8, 2026SaveLearn
Certifying bipartite entanglement on a superconducting processor from a corrected QAOA cost layerThe Quantum Approximate Optimisation Algorithm is the canonical near-term heuristic, yet on real superconducting hardware its behaviour is set by device physics, not by the algorithm. Hardware…Carlos-Miguel Lorenzo·Sep 8, 2026SaveLearn
Noise Limits on Fault-Tolerant Fermionic Quantum ComputingDetermining the highest amount of noise that quantum circuits can handle is an interesting and crucial task in the development of fault-tolerant quantum computation. Previous work has constrained…Owen Allison, Luke Coffman·Sep 8, 2026SaveLearn
A Block Tensor Train Burer-Monteiro Framework for Low-Rank Quantum State TomographyQuantum state tomography is a fundamental technique for estimating the state of a quantum system from measured data and plays a crucial role in evaluating the performance of quantum devices. However,…Shakir Showkat Sofi, Charlotte Vermeylen, Fatemeh Mohammadi et al.·Sep 8, 2026SaveLearn
Josephson energy of superconducting junctions: amorphous versus crystalline tunnel barriersThe Josephson energy EJ is a key parameter governing the properties of transmon superconducting qubits. In Al/AlOx/Al junctions, EJ is set by electron tunneling through an ultrathin oxide…Wanting Zhang, Aldilene Saraiva-Souza, Félix Beaudoin et al.·Sep 8, 2026SaveLearn
Induced random mixed states are symmetric Dirichlet mixturesWe establish an exact equivalence in distribution between D-dimensional random mixed states induced by partial traces over K-dimensional environments and the Mai-Alquier distribution, a mixture…Brian T. Kirby, Alexander C. B. Greenwood, Sanjaya Lohani et al.·Sep 8, 2026SaveLearn
Balancing Expressivity and Overfitting in Quantum Gaussian Process RegressionActive learning is a paradigm of machine learning that can be utilized to model expensive black-box functions by training a surrogate model from actively queried training points. The performance of…Saasha Joshi, Udson C. Mendes, Luke C. G. Govia·Sep 8, 2026SaveLearn
Non-Multiplicativity of the Holevo Barycenter of Quantum ChannelsThe Holevo barycenter of a quantum channel is the unique output state obtained as the average output of any ensemble achieving the Holevo capacity. Given two quantum channels, the multiplicativity…Sayantan Chakraborty, Stefano Mancini, Leonardo Rossetti et al.·Sep 8, 2026SaveLearn
Materials for Quantum Information Science: Roles in the Quantum Evolution 2.0Quantum information science is entering a second phase, the Quantum Evolution 2.0, in which the challenge has shifted from demonstrating coherent control of individual quantum states to building…Thang Pham, Vsevolod Ivanov, Dominic P. Goronzy et al.·Sep 8, 2026SaveLearn
From the Unknown to the Desired: Transforming Unknown Initial States in the Resource Theory of Work and HeatWe study thermodynamic state transformations in the resource theory of work and heat when the initial quantum state is unknown. Moving beyond state-dependent protocols, we develop a universal…Tanmoy Biswas, Andreas Winter·Sep 8, 2026SaveLearn
Certified targets for measuring and controlling an entanglement-breaking index on programmable hardwareThe entanglement-breaking index of a quantum channel is the number of self-compositions after which the channel destroys all entanglement with any reference system. For qubit channels it is decided…Eran Kopel·Sep 8, 2026SaveLearn
Execution-transcript privacy for fault-tolerant surface-code memoriesA fault-tolerant quantum computer runs behind a telemetry stream logging syndromes, decoder actions, resets and timing separately from the answer. Can it reveal the logical input? For a distance-d…Jiachen Shen, Hui Zhong·Sep 8, 2026SaveLearn
Multivariate quantum state preparation with optimized tensor networksQuantics tensor trains are attracting intense interest for quantum-inspired computing and quantum state preparation. These methods, which approximate continuum functions by representing their…Matthew L. Sims-Goh, Lukasz Cincio, Annina Z. Lieberherr et al.·Sep 8, 2026SaveLearn
Bell tests for collider decay processesWe propose Bell tests for collider decays using independently sampled analysis axes as settings and detector regions to assign binary or null outcomes. We show that a Bell violation requires…Danilo M. Fucci, Alexandre C. Orthey, Alan J. Barr et al.·Sep 8, 2026SaveLearn
Dual-unitary Circuits as a Platform for Quantum Reservoir ComputingQuantum reservoir computing (QRC) is a machine learning approach which employs the internal dynamics of a physical system (the reservoir) to encode and process information. In this work, we explore…Gabriel O. Alves, Pieter W. Claeys·Sep 8, 2026SaveLearn
Spectral Core-Tail Architecture for Locally Certified Gibbs-State PreparationPreparing a quantum Gibbs state requires reproducing both its thermal distribution and the associated many-body eigenspaces. In this work, we formalize the spectral core-tail architecture (SCTA) as a…Rui-Hao Li·Sep 8, 2026SaveLearn
Universal Entanglement Dynamics of Unitary OperatorsThe entangling power of a unitary operator acting on a bipartite Hilbert space measures the entanglement it generates from product states, averaged over the inputs. A finite-dimensional unitary has a…Ian Low, Navin McGinnis·Sep 8, 2026SaveLearn
Python in the front, party in the Backline: compiling quantum workloads across CPUs, GPUs, and FPGAsMoving from quantum research and development to production-grade, fault-tolerant quantum workload execution remains one of the most significant challenges facing quantum platform builders. While…Joseph K. L. Lee, Mehrdad Malekmohammadi, Hong-Sheng Zheng et al.·Sep 8, 2026SaveLearn
The Geometry of Transport in Quantum Walks and Parrondo's ParadoxWe study Parrondo's paradox -- the phenomenon where combining losing strategies yields a winning one -- in a minimal discrete-time quantum walk. We introduce the transport vector, encoded in the…Jose Alfredo de Leon, Mariana Pérez-Muralles, Jan Neuser et al.·Sep 8, 2026SaveLearn
Reconstructing fluid velocity fields from sparse sensors using a variational quantum algorithmReconstructing fields governed by nonlinear partial differential equations (PDEs) from sparse measurements is a challenging task because the governing equations are strongly nonlinear and…Nhat-Quang Nguyen, Mohammad Mehedi Hasan Akash, Kourosh Shoele et al.·Sep 8, 2026SaveLearn
On the Power of Adaptivity in Testing Quantum States in FidelityWe study the problems of quantum state certification, equivalence testing and independence testing. In certification, given samples of an unknown quantum state ρ and the description of a state σ,…Jan Seyfried, Sayantan Sen, Marco Tomamichel·Sep 8, 2026SaveLearn