Quantum Recovery from Black-Hole Radiation Beyond the Emission YieldA proposed resolution of the black-hole information paradox must explain which information an outside observer can recover from escaping radiationHawking,Page,Hayden,Almheiri. Environmental…Kashif Ammar Yasir·Nov 1, 2026SaveLearn
Quantum Lower Bounds for Collision ProblemsWe establish tight lower bounds on the adaptive and non-adaptive quantum query complexities of Promised k-to-one Finding on an exactly k-to-one input string x∈ Zqn, for every fixed…Pan Peng, Jingyu Wu·Nov 1, 2026SaveLearn
An Observable-Algebra Approach to Quantum Coherence in Anyonic SystemsPhysical restrictions on operations can make quantum coherence inaccessible. Quantifying off-diagonal density matrix elements in a chosen basis alone does not reveal which information is hidden by…Cheng-Qian Xu, D. L. Zhou·Nov 1, 2026SaveLearn
Mitigating sloppiness with intermediate controls in sequential multiparameter spin interferometryMultiparameter quantum sensing requires different parameters to produce distinguishable probe responses while allowing their information to be extracted simultaneously. In sequential sensing without…Hai Feng, Xinwei Li, Rong Lu et al.·Nov 1, 2026SaveLearn
Decoherence suppression in quantum dense codingBy harnessing entanglement to transmit information beyond the limits of classical communication, quantum dense coding serves as a key component in various quantum technologies. However, in the noisy…Xi Yan, Wen-Jie Zhang, Jun-Hong An·Nov 1, 2026SaveLearn
Bounds and sufficient conditions in quantum Zeno effectWhen a quantum system undergoes a series of repeated measurements during its time evolution to check whether it remains in the initial state, the resulting state lifetime can decrease (the quantum…Vladimir Parfenyev, Sergey Belan·Nov 1, 2026SaveLearn
Access Resources and Stability of Error-Correction Capabilities in Continuous Strategic CodesContinuous quantum error correction depends on which parts of a measurement record remain available to the controller at recovery. We study this temporal access using continuous strategic codes,…He Wang·Nov 1, 2026SaveLearn
From Ghost SICs to SIC-POVMs: A Galois Reduction of Zauner's ConjectureSymmetric informationally complete positive operator-valued measures (SIC-POVMs, or SICs) are optimal minimal measurements for quantum state tomography. Problem~1 of Horodecki, Rudnicki and…Hassan Khodaiemehr·Nov 1, 2026SaveLearn
Near-Optimal Learning of Quantum Many-Body Systems from Gibbs and Thermal Metastable States via the Stationarity TestWe study the problem of learning a finite-range quantum Hamiltonian on an n-qubit D-dimensional lattice from copies of its Gibbs states at a known inverse temperature β or its thermal…Tai Hsuan Yang·Nov 1, 2026SaveLearn
Purity maxima, absolute separability, and spectral volumes of absolutely PPT statesFor m n systems with n m3, we determine the exact maximum purity of absolutely positive partial transpose (APPT) states and the unique maximizing ordered spectrum when n2m2-4…Anh T. Tran·Nov 1, 2026SaveLearn
Boson sampling is fragile to lossBoson sampling experiments aim to demonstrate quantum computational advantage with increasing numbers of interfering photons. A central question is whether their computational hardness survives under…Youngrong Lim·Nov 1, 2026SaveLearn
A GPU-Accelerated and Geometry-Aware Quantum-Classical Framework for Optimized PES Scans with CUDA-QHybrid quantum-classical workloads, particularly Potential Energy Surface (PES) scans in quantum chemistry using batched VQE and QAOA, involve many structurally similar Hamiltonians differing only in…Panayiotis Christou, Shuwen Kan, Ying Mao·Nov 1, 2026SaveLearn
Logical-Class Diagnostic Layer for Stabilizer Codes and Decoders via Supercharge StructuresWe develop a decoder-agnostic logical-class diagnostic layer for abelian Pauli stabilizer codes, motivated by fault-tolerant quantum computing. An ancilla fermionic register defines a nilpotent…Hai Lin·Oct 31, 2026SaveLearn
Theoretical estimation of nonlinear response function and ultrafast optical spectroscopy of nitrogen vacancy centersThe theoretical description of the ultrafast optical response of nitrogen-vacancy centers has traditionally been developed using the nonlinear response function formalism based on a displaced…Arunangshu Debnath·Oct 31, 2026SaveLearn
Floquet engineering of quantum relaxationDynamical decoupling suppresses decoherence by averaging selected interactions between a quantum system and its environment. Here, we extend this notion through a general Floquet formalism that maps…Kang Xu, Dionisio Cendoya, Nazar Delegan et al.·Oct 31, 2026SaveLearn
Hidden selection rules and amplitude ceilings in quantum Fourier modelsQuantum models with Pauli data encodings compute trigonometric polynomials whatever channels, ancillas and outcome-averaged measurements follow, so their expressivity depends on the Fourier…Pavel Sulimov, Claude Lehmann·Oct 31, 2026SaveLearn
Maximum purity of absolutely separable and absolutely PPT states in qutrit--qudit systemsA bipartite state is absolutely positive partial transpose (APPT) if it remains PPT under every global unitary transformation, and absolutely separable if it remains separable. For every…Anh T. Tran·Oct 31, 2026SaveLearn
Model-Based Fast Calibration for a Nitrogen Vacancy Center QPUWe present a simulation-informed calibration workflow for NV quantum processing units that combines a digital twin, optimal control pulses, and a Fisher-information-guided experiment design into an…Tobias F. Sjolander, Marco Rossignolo, Lorena C. Bianchet et al.·Oct 31, 2026SaveLearn
Chaos, Fractals, and Ergodicity in Nonlinear Quantum ProtocolsIterated nonlinear quantum protocols provide a straightforward way of realizing nonlinear dynamics in quantum systems through measurement and postselection. We investigate a family of protocols in…Attila Portik, Orsolya Kálmán, Tamás Kiss·Oct 31, 2026SaveLearn
Persistence of Fractal Structures in Iterated Quantum Protocols: Robustness to Preparation and Gate ErrorsRepeatedly combining entangling gates on an ensemble of qubits with measurement and postselection on a part of them induces a nonlinear evolution of the unmeasured qubits' state, whose fractal…Attila Portik, Orsolya Kálmán, Tamás Kiss·Oct 31, 2026SaveLearn
Cooling-path-selected self-assembly of telecom InAsP quantum dotsEpitaxial quantum dots are leading solid-state sources of quantum light, but reproducible growth on indium phosphide (InP) remains challenging because dot-formation windows are narrow and emission…Yiteng Zhang, Doaa Abdelbarey, Markus Etzkorn et al.·Oct 31, 2026SaveLearn
Pump-scheme dependence of few-emitter lasers: exact multilevel correlations and photon statisticsFew-emitter laser models usually replace the excitation cycle of the gain medium by a single Markovian pump jump of a two-level emitter. We test this replacement with the cavity and laser-transition…Stephan Hartmann·Oct 31, 2026SaveLearn
All-to-All Connectivity in Superconducting Qubits via Metamaterial-Mediated InteractionsWe show that encoding superconducting qubits as dual-rail or spin-locked transmons lets a metamaterial waveguide couple them all-to-all while suppressing the spurious entanglement that burdens…Or Golan, Alexey V. Gorshkov, Andreas Butler et al.·Oct 31, 2026SaveLearn
On Estimating Quantum Divergences with p-Power MeansWe study the problem of estimating the quantum divergence with p-power means, Φp(ρ\,\|\,σ). This quantity was investigated by Lam and Le (Linear Algebra Appl.\ 2021). For any constant…Jinge Bao, Minbo Gao, Qisheng Wang·Oct 31, 2026SaveLearn
Optimally Weighted Constrained Shadow Tomography for Reduced Density MatricesAccurate measurement of reduced density matrices (RDMs) is central to quantum simulations of many-fermion systems, but the required measurement resources remain a significant challenge. Constrained…Yuchen Wang, Irma Avdic, Michael Rose et al.·Oct 31, 2026SaveLearn