Interconnection of Quantum Networks at Urban scale: Analysis of Temporal Stability of Entangled Photon SourcesTime synchronization is a fundamental requirement in entanglement-based quantum networks, where the indistinguishability of photons in the time domain is essential for enabling Hong-Ou-Mandel…Laura d'Avossa, Angela Sara Cacciapuoti, Marcello Caleffi·Jul 30, 2026SaveLearn
Witness robustness: An operational quantifier of measurement resources via free state discriminationWe introduce the witness robustness of quantum measurements, a resource quantifier whose admissible noise consists of tuples of free-state witnesses rather than physical measurements. We establish…Jingsong Ao, Aby Philip, Alexander Streltsov·Jul 30, 2026SaveLearn
Trainability and Mode Separation of Mixed IQP-QCBMsQuantum circuit Born machines (QCBMs) based on instantaneous quantum polynomial-time (IQP) circuits are promising quantum generative models for their classical trainability. It is known that their…Youngseok Lee, Hyunwoo Kim·Jul 30, 2026SaveLearn
Beating the Bad-Cavity Limit via Auxiliary-Emitter Linewidth SqueezingStrong coupling in cavity QED is conventionally achieved at the expense of either high cavity quality factors or ultrasmall mode volumes, a trade-off that fundamentally constrains practical…Youke Xu, Zeyang Liao, Xue-hua Wang·Jul 30, 2026SaveLearn
Bayesian Networks of Density OperatorsWe study quantum analogues of Bayesian networks on a directed acyclic graph (DAG), distinguishing two constructions for positive definite density operators on finite-dimensional tensor-product…Steffen Lauritzen, Piotr Zwiernik·Jul 30, 2026SaveLearn
Even-harmonic generation through nonequilibrium steady-state symmetry breakingHigh-harmonic generation (HHG) in inversion-symmetric systems is typically restricted to odd harmonics by symmetry. Here, we show that this selection rule can be broken without modifying the…Milad Jangjan, Arman Kashef, Siamak Pooyan et al.·Jul 30, 2026SaveLearn
Quantum machine learning interatomic potential: Application of variational quantum algorithmThis study applied quantum circuit learning, a commonly used hybrid quantum-classical machine learning algorithm, to a machine learning interatomic potential (MLIP) for predicting the energies of…Kohei Numata, Wataru Mizukami, Kosuke Mitarai et al.·Jul 30, 2026SaveLearn
Resource-efficient quantum-selected configuration interaction for molecular propertiesThe quantum-selected configuration interaction identifies important determinantal basis functions through real-time evolution of a reference wavefunction and diagonalizing the Hamiltonian matrix in…Suprava Sahoo, Abdul Kalam, Kenji Sugisaki et al.·Jul 30, 2026SaveLearn
Quantum Magnonics: Quantum States Generation and ApplicationsHybrid systems based on magnons in ferromagnetic materials, such as yttrium iron garnet, have achieved remarkable development in the last decade. These include the coupling of magnons to microwave…Zi-Xu Lu, Xuan Zuo, Xin-Lei Hei et al.·Jul 30, 2026SaveLearn
Exact Incompatibility-Breaking Criterion for Unital Qubit ChannelsWe study when a noisy qubit channel renders all positive-operator-valued measures (POVMs) jointly measurable. For every unital qubit channel, we derive the exact incompatibility-breaking criterion…Yujie Zhang·Jul 30, 2026SaveLearn
Phase Retrieval in C4 Requires Exactly Eleven MeasurementsDetermining the minimal number of intensity measurements required for phase retrieval in C4 has been a long-standing open problem. Prior to this work, the best-known results implied that…Meng Huang, Jihun Kim·Jul 30, 2026SaveLearn
Quantum coherence and entanglement in wireless quantum batteriesWe investigate the charging dynamics and thermodynamic performance of a wireless quantum battery system mediated by a common structured bosonic environment. By employing a unified resource-theoretic…Jun-Jie Jiang, Jin-Di Cao, Yu-Fei Zhang et al.·Jul 30, 2026SaveLearn
Quadruply Bonded Mo2 Molecules: An Innate Emitter-Resonator Quantum System in Free SpaceIn recent decades, significant progress has been made in constructing and studying individual quantum systems based on two level atoms (molecules) and photons. Here we demonstrate that the quadruply…Miao Meng, Ying Ning Tan, Zi Cong He et al.·Jul 30, 2026SaveLearn
Quantum LDPC codes with design rate 1/5 and good performance below 1000 physical qubitsConstant-rate quantum low-density parity-check (LDPC) codes promise fault-tolerant quantum computation with constant spatial overhead in the asymptotic limit. Nonetheless, discovering finite-length…Yifan Hong·Jul 30, 2026SaveLearn
Exploring the use of quantum computing for facilitating spatially and temporally resolved models of a biological cellWhole-cell simulation, modeling all of a cell's functional systems over its life cycle, is an outstanding challenge in computational biology. Even the simplest living cell contains thousands of…Muralikrishnan Gopalakrishnan Meena, Dileep Kishore, Jerry M. Parks et al.·Jul 30, 2026SaveLearn
Efficient learning of bosonic unitaries beyond the Gaussian classMultimode quantum processes are generally difficult to learn, due to the large dimensionality and complex entanglement structure beyond the Gaussian class. Here, we show that the fundamental…Xiaobin Zhao, Quntao Zhuang·Jul 30, 2026SaveLearn
Mean-field Pulse Adaptation for the Circularization of Interacting Rydberg AtomsArrays of circular Rydberg atoms provide a promising platform for quantum simulation and computation; however, their preparation in the presence of interatomic interactions remains a major challenge.…Matthias Hüls, Felix Motzoi, Tommaso Calarco et al.·Jul 30, 2026SaveLearn
Quantum Incapacity beyond No-Cloning and PPT MechanismsWe show an explicit qutrit channel whose private and quantum capacities both vanish, although it is neither antidegradable nor positive under partial transposition (PPT). This resolves two…Chengkai Zhu, Xin Wang·Jul 30, 2026SaveLearn
Component-Level Inverse Design of Transmon Qubits Using Neural NetworksDesigning a superconducting qubit to realize specific Hamiltonian parameters typically requires iterating through a time and compute-intensive forward loop in which the designer chooses a layout…Olivia Seidel, Firas Abouzahr, Abhishek Chakraborty et al.·Jul 30, 2026SaveLearn
Unitary k-designs without independent Hamiltonian quenchesUnitary k-designs provide a resource-efficient framework for emulating Haar randomness up to the k-th order. Quench-based protocols have recently been shown to generate such designs, but…Pratik Nandy·Jul 30, 2026SaveLearn
Remote entanglement need not be the bottleneck for modular trapped-ion quantum computingModularity underpins classical computing; as quantum processors encounter limits on fabrication yield, reliability, and size, they will also need it acutely. The bottleneck to linking modules is…Felix W. Knollmann, David P. Nadlinger, John Blue et al.·Jul 30, 2026SaveLearn
Fast logical operations in quantum LDPC codes using simple resource statesQuantum LPDC codes provide a substantial reduction in qubit overhead required for fault-tolerant quantum computation compared to surface code, thanks to their high encoding rate. However, operating…Mark Webster, Nicolas Delfosse·Jul 30, 2026SaveLearn
Thermal Activation of Divergent Distillable Entanglement under Non-Abelian Strong SymmetryHeating usually destroys quantum entanglement. We show that thermalization constrained to a non-Abelian strong-symmetry sector can instead generate a distillable resource that diverges with system…Shuai Zeng·Jul 30, 2026SaveLearn
Temperature Beyond Equilibrium in Isolated Quantum Many-Body Systems and Their SubsystemsTemperature is one of the central concepts of thermodynamics, yet its meaning far from equilibrium remains unclear. The problem is especially challenging in isolated quantum many-body systems, whose…Maurizio Fagotti·Jul 30, 2026SaveLearn
Möbius-Guided Diagonal-Gate Compilation with Native Multiqubit Controlled-Phase Gates on Neutral-Atom ProcessorsDiagonal gates are ubiquitous primitives in quantum algorithms, from phase oracles, hypergraph-state preparation, and multi-control logic to Hamiltonian simulation of spin models and digitized…Hairuo Huang, Yanwu Gu, Chen Huang et al.·Jul 30, 2026SaveLearn