Qubit-Efficient Variational Quantum Optimization via Pauli Correlation Encoding: Application to Large-Scale Power Demand Portfolio OptimizationVariational quantum algorithms offer a promising route to combinatorial optimization, but their applicability is limited by the challenge of encoding large-scale problems within restricted qubit…Takuya Yoshioka, Keita Sasada, Riku Usuki et al.·Jul 27, 2026SaveLearn
Coincidence free certification and quantification of spatial entanglement with stimulated parametric down conversionUsing stimulated emission, a photon pair source can be characterized by seeding the signal mode with a bright classical beam and measuring the stimulated idler field, thus replacing two-photon…M. G. Damaceno, G. H. dos Santos, N. Rubiano da Silva et al.·Jul 27, 2026SaveLearn
Efficient LLM-Generated Shuttling Compilers for Complex Trapped-Ion ArchitecturesTrapped-ion quantum computers rely on shuttling compilers, which cast an input algorithm into a sequence of ion-qubit movements within a given architecture. We present the first study in which a…Fabian Kreppel, Reza Salkhordeh, Ferdinand Schmidt-Kaler et al.·Jul 27, 2026SaveLearn
Sample complexity of quantum resource testing via one-shot quantum blurringQuantum resource testing is a fundamental primitive of quantum information processing, profoundly connected to resource manipulation. Its goal is to discriminate n copies of a given resourceful…Dmitry Grinko, Ludovico Lami·Jul 27, 2026SaveLearn
How Many Shots Does It Take? A Noise-Aware Quantum Resource Allocation FrameworkAny algorithm execution on quantum computers requires several repeated and costly executions (known as shots) to obtain reliable results. In this work, we propose a closed-form accurate analytical…Prateek P. Kulkarni, Sumit K. Mandal·Jul 27, 2026SaveLearn
Almost all pure entangled states enable unbounded nonlocality sharingWe establish a connection between Hardy's paradox and nonlocality sharing in sequential bipartite scenarios, where each subsystem is measured in turn by a chain of observers. We show that any…Anna Steffinlongo, Nicola D'Alessandro, Martin J. Renner·Jul 27, 2026SaveLearn
Sharp continuity of quantum conditional entropyWe prove the sharp uniform continuity bound for quantum conditional entropy. If two bipartite states are at trace distance at most δ and d= A, the optimal dimension-only modulus of continuity…Mario Berta, Pablo Costa Rico, Gereon Kossmann et al.·Jul 27, 2026SaveLearn
Stacking the Deck: Tunable Trainability in Stacked LCUsVariational quantum circuits have been central to many proposed near-term applications of quantum computing, but a growing body of evidence suggests that trainability and quantum advantage are…Nikhil Khatri, Stefan Zohren, Gabriel Matos·Jul 27, 2026SaveLearn
CP-preserving channelsCompletely positive (CP) matrices are ubiquitous in modern science and technology with applications in optimization, graph theory, and quantum entanglement. Recently, Johnston et al. [Linear…Indu Bala, Sourav Das, Swapan Rana·Jul 27, 2026SaveLearn
Exact and Fixed-Point Grover Search with QuditsGrover's algorithm provides a quadratic speedup for searching unstructured databases and is traditionally implemented with qubits in Hilbert spaces whose dimensions are powers of two. With the…Tanay Roy·Jul 27, 2026SaveLearn
Geometric bounds on multiparameter Heisenberg scaling in optical metrology with limited squeezed resourcesThe simultaneous estimation of multiple parameters is a central task in quantum metrology, distributed sensing, and the calibration of large photonic interferometers. A fundamental question is how…Atmadev Rai, Paolo Facchi, Vincenzo Tamma·Jul 27, 2026SaveLearn
Quantum-Limited Symbol-Blind Channel Estimation for Coherent State DiscriminationResidual dispersion breaks temporal-mode matching in photon-starved coherent links. For equiprobable M-ary PSK coherent states in a known spectral mode, with unknown symbols and carrier phase, we…Hongxu Chen, Renzhi Yuan, Haifeng Yao et al.·Jul 27, 2026SaveLearn
Experimental Side Channel Analysis of Protocol Stages in Quantum Identity AuthenticationQuantum networks can enable distributed computing and sensing. To realize these capabilities securely, quantum identity authentication is essential. Without authentication at the quantum layer,…Marwan Elawady, Lance Young, Contessa Wilburn et al.·Jul 27, 2026SaveLearn
Experimental Protocol Fingerprinting in Quantum Networks via Physical Layer Side Channel AnalysisQuantum communication is a key enabler of next-generation networks, leveraging quantum entanglement to enable a new class of information exchange. While prior work has focused on the theoretical…Lance Young, Contessa Wilburn, Carrie Houston et al.·Jul 27, 2026SaveLearn
Unravelling time-resolved Interparticle Coulombic Decay: From spectral formation to decay lifetimesElectronic decay processes provide a fascinating window into correlated electronic rearrangements occurring on ultrafast timescales. Following these dynamics in real time has become increasingly…Alexander V. Riegel, Max K. Humm, Jan-Thore Kahle et al.·Jul 27, 2026SaveLearn
Entanglement Distillation and Swapping Scheduling in Quantum Repeaters with Noisy MemoriesEntanglement distillation and entanglement swapping have been extensively studied assuming perfect quantum memories. However, near-term quantum networks will be fundamentally limited by quantum…Siddharth Chander, Xinan Chen, Allen Zang·Jul 27, 2026SaveLearn
Thermal Quantum Correlations in Coupled Andreev Spin Qubits: Interplay of Superconducting Phase and Spin-Orbit InteractionWe investigate thermal quantum correlations in a system of two coupled superconducting spin qubits described by an effective Andreev spin-qubit Hamiltonian in the presence of spin-orbit interaction.…Mohammad Reza Pourkarimi, Mina Shiri, Mehdi Monemi et al.·Jul 27, 2026SaveLearn
A Bohmian version of a 2-state quantum systemI construct a Bohmian version of a 2-state quantum system, where in addition to the quantum state, the system is characterized by a definite physical state which changes stochastically under the…Matthew Dickau·Jul 27, 2026SaveLearn
Two-copy nondistillability of Werner states: sharp partial-trace inequalities and finite-copy extensionsWe solve the two-copy distillability problem for Werner states in every local dimension. Our main matrix result is a sharp, dimension-free inequality: for every rank-at-most-two operator, the sum of…Kishor Bharti, Rishikesh Gajjala, Tobias Haug·Jul 27, 2026SaveLearn
The bare necessities of a physically reasonable mathematical model for quantum theoryThe physical foundation of the mathematical formalism of quantum theory is still an iffy mystery. Here it is presumed that a physically reasonable mathematical model needs only three basic features.…Gerd Niestegge·Jul 27, 2026SaveLearn
Finite-Precision Algebraic Quantum Field Theory: Quantum Parcels, Locality, Modular Structure and FactorsWe develop Interval Algebraic Quantum Field Theory (IAQFT), a finite-precision operational formulation of algebraic quantum field theory (AQFT). Physical experiments provide only finitely many…Abbas Edalat·Jul 27, 2026SaveLearn
Quantum Fisher information and imperfect detection in a monitored fermion chainWe study the metrological properties of a continuously monitored Kitaev chain in the presence of imperfect detection. The system is conditioned on a no-click record, while each emitted fermion is…Giovanni Di Fresco, Davide Valenti, Angelo Carollo·Jul 27, 2026SaveLearn
Floquet time-convolutionless master equation for non-Markovian driven quantum systemsWe study the dynamics of open quantum systems driven by an external time-periodic force. Combining Floquet theory and the time-convolutionless projection operator technique we derive a time-local…Pietro Follia, Heinz-Peter Breuer, Bassano Vacchini·Jul 27, 2026SaveLearn
Multivariate Time Series Forecasting with Adaptive Non-Local ObservablesMultivariate time series forecasting (MTSF) predicts future values of multiple variables from historical data. While quantum neural networks have been increasingly applied to this task, they…Yu-Ting Lee, Huan-Hsin Tseng, Samuel Yen-Chi Chen·Jul 27, 2026SaveLearn
Electron Shuttle Waiting Times for Electric Field SensingWe explore the use of waiting-time statistics in a quantum electron shuttle for electric-field sensing. Electron shuttles convert nanomechanical motion into charge transport, showing a…Alberto Mayorgas, Alberto López-García, Enamul Haque et al.·Jul 27, 2026SaveLearn