Efficiently tracking errors and outcomes in universal quantum circuitsWe present a method for efficient simulation of error propagation and decoding in universal fault-tolerant quantum circuits under stochastic Pauli noise, requiring only that the circuit has a high…Thomas R. Scruby, Julio C. Magdalena de la Fuente·Nov 4, 2026SaveLearn
Symmetry-guided algorithms for variational quantum optimizationQuantum numbers associated with symmetries classify quantum states and identify the sectors relevant to a given simulation. Generic hardware-efficient ansatzes do not necessarily preserve the quantum…Eunjin In, Kristina D. Launey, Darin C. Mumma et al.·Nov 4, 2026SaveLearn
Classical records and Bell correlations in a dynamically formed quantum bodyCompeting quantum contacts can create a boundary that was absent from the specification of a subsystem. We construct approximately isolated bodies from bare field vacuum and zero-centred contact…XinXin Qi, Hao Sun·Nov 4, 2026SaveLearn
Structural Lower Bounds for Quantum Property Estimation with Persistent MemoryIn quantum property estimation, an experimenter estimates Tr(Oρ) for a family of observables from independent copies of an unknown state ρ simultaneously to additive error ε.…Ye Tao, Hong Shen·Nov 4, 2026SaveLearn
Reading Why: Born-Measured Attention with Exact Word Evidence on Light and QubitsWhen a language model answers, we can usually only estimate why. We build a transformer in which every step is a Born measurement - attention | q|k|4 normalised over each row, a…Teerawat Tongloy, Jiraporn Pongsopa, Rangsan Jomtarak·Nov 4, 2026SaveLearn
The most entangled states of four and seven qubitsPure states of four and seven qubits cannot be maximally entangled across every balanced bipartition; we determine how entangled they can be on average. For four qubits we prove the conjecture of…Antony Lewis·Nov 3, 2026SaveLearn
Trinetra.Q: Statistical and Behavioral Detection of Attacks on the Quantum-Error-Correction Layer and Classical Control Stack of Quantum Computing SystemsMost quantum-computer security work targets physical-layer attacks on qubits, while two surfaces remain inadequately defended: the quantum-error-correction (QEC) syndrome-and-decoder pipeline, and…Garrv Sipani·Nov 3, 2026SaveLearn
Efficient training of a 128-modes 3D continuously coupled photonic chip via limited quantum resourcesIntegrated photonics provides a promising route towards the development of large-scale, stable and low-loss quantum hardware. Existing implementations of universal quantum photonic chips generally…Denis Stanev, Simone Di Micco, Francesco Hoch et al.·Nov 3, 2026SaveLearn
Tensor-network simulation of strongly coupled multi-fluxonium circuitsDesigning a superconducting quantum processor rests on predicting the low-lying spectrum of its coupled circuit. The Hilbert-space dimension of the circuit's lumped-element model grows…Christian Hensel, Andrés N. Cáliz, Pau Torrente et al.·Nov 3, 2026SaveLearn
A Study of Fluctuation Growths of Observables in Open Quantum SystemsThe rate at which quantum fluctuations of observables can change provides a useful characterization of the dynamical behavior of quantum systems. For closed quantum systems undergoing unitary…Newshaw Bahreyni, Paul M. Alsing, Carlo Cafaro et al.·Nov 3, 2026SaveLearn
Quantum resource trade-offs of mixed sparse single and double factorization for qubitization-based phase estimationWe study a mixed block encoding of quantum-chemistry Hamiltonians for quantum phase estimation (QPE) on fault-tolerant quantum computers. Following a Cholesky decomposition of the electron repulsion…Troy Losey, Jacob Z. Williams, Avanish Mishra et al.·Nov 3, 2026SaveLearn
Multipartite entanglement swapping with homodyne and single photon detectionEstablishing multipartite entanglement across lossy optical networks remains a central challenge for distributed quantum information processing. Here, we consider a non-Gaussian continuous-variable…Tarek Assaf, Josephine Dias·Nov 3, 2026SaveLearn
SPAM-robust learnability of quantum dynamicsAccurate characterization of quantum dynamics is essential for the calibration and control of quantum devices. Unknown state preparation and measurement (SPAM) errors, however, introduce gauge…Zitai Xu, Guoding Liu, Senrui Chen·Nov 3, 2026SaveLearn
Higher-order quantum information inequalities and error-correction of non-Markovian noiseDefining entropy of a quantum channel has become a challenge with potential candidates recently reported in literature. In this Article, it is taken under consideration the entropy of a quantum…Matheus Capela·Nov 3, 2026SaveLearn
Quantum theory of damping: A new approach to temporal evolution of density operator without the rotating wave approximationThe Lindblad master equation is the standard framework for describing dissipative dynamics of the open quantum system context. Its conventional derivation, however, relies on the rotating-wave…A. Marashi Nasab, E. Ghasemian, M. K. Tavassoly·Nov 3, 2026SaveLearn
Quantum error correcting codes from quiver moduli: Grassmannians, cyclic monodromy, and argyle collision divisorsBuilding on aspects of a recent diagrammatic field-theory programme for quantum error correction put forward by the first-named author (arXiv:2607.08911), we construct exact finite-dimensional codes…Steven Rayan, Evan Sundbo·Nov 3, 2026SaveLearn
From Claws to Conferences: Device-Independent Key Agreement Beyond Non-SignalingDevice-independent conference key agreement (DI-CKA) allows a group of users to establish a common secret key without trusting the internal operation of their quantum devices. Existing DI-CKA…Suvradip Chakraborty·Nov 3, 2026SaveLearn
Bounded decoding complexity in transversal circuits with magic state injectionWe characterize the complexity of space-time correlated decoding for fault-tolerant quantum computing architectures that implement Clifford gates transversally and realize non-Clifford gates via…Lukas M. Sieberer, Giacomo Giudice·Nov 3, 2026SaveLearn
Raychaudhuri-Ehlers Kinematics on Quantum State-Space: Caustics and Extrinsic Quantum GeometryQuantum mechanics is inherently geometric in that the pure states form a curved complex manifold and the Schrödinger evolution defines a Hamiltonian flow on this space. Geometry identifies…Neellohit Karmakar, Suraj S. Hegde, Aryan Bhatia·Nov 3, 2026SaveLearn
Boosted Entanglement SwappingEntanglement swapping entangles photons that never interacted directly. When implemented with linear optics, its success probability is upper bounded by 50\%, due to the limited efficiency of…Matthias J. Bayerbach, Simone E. D'Aurelio, Stefanie Barz·Nov 3, 2026SaveLearn
Krylov meets Fock: Complementary lenses on quantum dynamicsQuantum dynamics in Krylov space can be represented by a particle hopping on a chain whose sites are the Krylov basis vectors. The goal of this work is to extend this idea to the Fock basis, which in…Giuseppe Di Giulio, Dimitrios Patramanis·Nov 3, 2026SaveLearn
Classical training of conditional instantaneous quantum polynomial-time Born machinesInstantaneous quantum polynomial-time (IQP) Born machines are attractive quantum generative models, as certain IQP circuit families are conjectured to be hard to sample, yet they can be trained…Oriol Balló-Gimbernat, Emiliano Tolotti, Laia Domingo et al.·Nov 3, 2026SaveLearn
Zero noise extrapolation of transport coefficientsNISQ devices routinely estimate properties of the noiseless system from measurements at varying noise strengths γ. These zero-noise extrapolation (ZNE) schemes fail to estimate transport…Hansveer Singh, Pieter Claeys, Sarang Gopalakrishnan et al.·Nov 3, 2026SaveLearn
Fermionic Porter-Thomas statistics and their emergence in random matchgate circuitsFor Haar-random quantum states, measurement probabilities follow the universal Porter--Thomas distribution. This implies anticoncentration, i.e.\ the spreading of probability over exponentially many…Guglielmo Lami·Nov 3, 2026SaveLearn
Noise-Induced Topology in Chiral Quantum WalksNoise typically destroys quantum coherence and washes out transport phenomena that rely on interference. Chiral quantum walks are a case in point: a particle hopping on a lattice threaded by a…Alexandre Chaduteau, Derek K. K. Lee, Frank Schindler et al.·Nov 3, 2026SaveLearn