Towards fault-tolerance with universal phase-error-transparent gates for high-spin cat codesHigh-dimensional nuclear spins offer a hardware-efficient route to quantum error correction (QEC), with the spin cat code providing intrinsic robustness against phase errors -- the dominant noise…Kelvin Onggadinata, Si Yan Koh, Arghya Maity et al.·Aug 6, 2026SaveLearn
Geometry-Only CSL/DP Ratios and the Nonuniqueness of Decoherence KernelsWe study idealized levitated protocols that create spatial superpositions of massive test particles. For each protocol, we compare the dimensionless contrast-loss exponent of mass-proportional…Randy Davila, Gerard J. Milburn·Aug 6, 2026SaveLearn
Field-Space Entanglement Dynamics Between Tunnel-Coupled Luttinger LiquidsEntanglement dynamics depend not only on how a quantum system is partitioned, but critically on how interactions across that partition are structured. For a spatial bipartition of a locally…Léonce Dupays, Taufiq Murtadho, Bi Hong Tiang et al.·Aug 6, 2026SaveLearn
Dynamical phase transition in generalized Dicke model with strongly interacting trapped Rydberg ionsWe study dynamical phase transitions in the generalized dissipative Dicke model in an array of trapped Rydberg ions, where their density-density interactions compete with the collective spin-phonon…Manish Chaudhary, Rejish Nath, Weibin Li·Aug 6, 2026SaveLearn
Exponential Speedup of Entanglement Generation by Quantum Mpemba EffectsEntanglement is a key resource for quantum technologies. We show that protocols employing quantum Mpemba effects allow one to exponentially accelerate the generation of entanglement, or to slow down…Sara M. Benjadi, Reinhold Egger, Igor Gornyi et al.·Aug 6, 2026SaveLearn
Quantum error correction with global controlReaching fault tolerance means scaling qubit counts by orders of magnitude, a jump that conventional superconducting architectures cannot sustain without solving the so-called `wiring problem'.…Roberto Menta, Lindsay Bassman Oftelie, Ashkan Abedi et al.·Aug 6, 2026SaveLearn
Symmetry-guided constructions of absolutely maximally entangled states in five open casesWe give explicit Hermitian self-dual maximum distance separable codes with parameters [12,6,7]25, [18,9,10]121, and [18,9,10]169. The stabilizer construction proves the existence of…Samuel Bevins, Yunus Bidav·Aug 6, 2026SaveLearn
Robust logarithmic entanglement lower bound for f-routingIn one-round f-routing, Alice receives an n-bit string x and an unknown qubit, and Bob receives an n-bit string y. They exchange one simultaneous message each and cannot communicate…Kevin Bogner·Aug 6, 2026SaveLearn
QSCI-CMP: Quantum-Selected Configuration Interaction with Chemically Motivated PreselectionWe present QSCI-CMP, a quantum-classical hybrid algorithm for molecular ground-state calculations that reduces both the query count and the gate count of sample-based quantum diagonalization with…Masahiko Kamoshita, Kosuke Mitarai·Aug 6, 2026SaveLearn
Multi-cavity strong coupling to an electron spin ensemble: spectral and dark-state signaturesSpin ensembles are considered as potential candidates for quantum memory and quantum enhanced sensing applications. Here, we explore the controlled coupling of multiple superconducting microwave…P. Oehrl, B. Pérez González, A. Dunaev et al.·Aug 6, 2026SaveLearn
Quantum One-Way Functions and Related Cryptographic PrimitivesQuantum cryptographic primitives beyond key distribution remain a less well understood area of research. In classical cryptography, one-way functions underpin nearly all standard cryptographic…Georgios M. Nikolopoulos·Aug 6, 2026SaveLearn
The Locality Gap: A Thermodynamic Law for Objective FactsObjective facts in quantum Darwinism are values recorded redundantly in many independently accessible fragments of the environment. Redundancy does not create additional logical information, so its…Maxim V. Churilov·Aug 6, 2026SaveLearn
Finite Quantum Histories: Holonomy Spectra, Minimal Clocks, and Exact Clock-Change CovarianceWe solve cyclic finite-dimensional quantum histories for arbitrary time-dependent unitary steps, without assuming that one step has finite order. The propagation Hamiltonian is a unitary connection…Maxim V. Churilov·Aug 6, 2026SaveLearn
Improved regret bounds for structured online learning of quantum statesQuantum state tomography is fundamental to quantum information processing but becomes infeasible at scale due to the exponential growth of the state space. Shadow tomography alleviates this challenge…Akshay Bansal, Jiahui Liu·Aug 6, 2026SaveLearn
Beyond transversality: structure of Clifford circuits for CSS codesWe characterize four groups of Clifford circuits for Calderbank--Shor--Steane (CSS) codes that are relevant to fault-tolerant logical operations. First, we show that every code-preserving Clifford…Victor V. Albert·Aug 6, 2026SaveLearn
Provably Efficient Self-Calibrating Quantum Fault ToleranceQuantum error correction protects logical information only when every physical operation remains below the fault-tolerance threshold, a condition that must be maintained continuously rather than only…Weiyuan Gong, Hong-Ye Hu·Aug 6, 2026SaveLearn
How Much Reconstruction Does Quantum Machine Learning Need? Late Fusion of Independently Trained Quantum SubcircuitsCircuit cutting lets a large quantum neural network (QNN) run as independent subcircuits on small devices, but rebuilding its outputs by reconstruction carries a classical sampling overhead…Prabhjot Singh, Adel N. Toosi, Rajkumar Buyya·Aug 6, 2026SaveLearn
Quantum information lossWe introduce a measure of information loss for any quantum process that may be modeled by a prepare-evolve-measure scenario: Alice prepares an ensemble of states that gets sent via a quantum channel…James Fullwood, Wu-zhong Guo, Boyu Yang·Aug 6, 2026SaveLearn
A Unified Framework for Sample Complexity of Structured Quantum State Tomography under Noisy ObservationsQuantum state tomography (QST) has attracted considerable attention due to its fundamental role in quantum information processing. In this paper, we develop a unified theoretical framework for…Zhen Qin·Aug 6, 2026SaveLearn
X-Z Round Scheduling for the Surface Code with Defects under Biased NoiseFault-tolerant Quantum Computing (FTQC) relies on Quantum Error Correction (QEC) codes that encode logical qubits across many physical qubits to detect and correct errors. The surface code is among…Lakshika Rathi, Pau Escofet, Joshua Viszlai et al.·Aug 6, 2026SaveLearn
Generating two-mechanical mode entangled cat states, and steady-state entanglement, in cavity optomechanics in the presence of dissipationWe investigate a dissipation-engineering approach to produce a phase-dependent collective-mode Schrödinger cat state involving two modes. Our model features a single cavity mode that interacts with…Sanket Das, Jason Twamley·Aug 6, 2026SaveLearn
What meter interference can tell us about the statistics of weak measurementsIt is widely assumed that the quantum fluctuations of the meter readout in a weak measurement make it impossible to identify the contributions originating from the individual values of the physical…Holger F. Hofmann, Tomonori Matsushita, Masayoshi Isobe et al.·Aug 6, 2026SaveLearn
Inverse Design of Quantum Control Sequences with Fourier Neural OperatorsQuantum optimal control is a key tool for steering quantum dynamics, but its computational cost grows rapidly with the Hilbert space dimension. Here, we introduce a Fourier Neural Operator…Anastasia Pipi, Valentin Duruisseaux, Emily Been et al.·Aug 6, 2026SaveLearn
Gravitational redshift as a quantum channel: modeling the effects of gravitational redshift in quantum opticsThe gravitational frequency shift of light is well understood in the theory of classical electromagnetism. Nevertheless, its description in quantum theory is not yet fully developed. Recent work…Thomas Mieling, Andreas Wolfgang Schell, David Edward Bruschi·Aug 6, 2026SaveLearn
Schmidt-Gauge Non-Local Magic: Representation, Optimality, and Mathematical PropertiesWhile the full non-stabilizerness (magic) of a quantum state contains local, basis-dependent contributions, a non-local formulation based on a minimization over local unitaries isolates the component…Fabio Franchini, Salvatore Marco Giampaolo·Aug 6, 2026SaveLearn