From Round-Trip State Echo to Error Recovery: Snapshot-Resolved Quantum-Hardware DiagnosticsQuantum-hardware scores vary across workloads and execution times. We study these variations through repeated communication and deletion-recovery experiments on superconducting and trapped-ion…Isaac Barouch Essayag, Aryeh Lev Zabokritskiy·Aug 26, 2026SaveLearn
Superadditivity of classical communication over quantum channels via random and deterministic permutationsSince Hastings' proof of superadditivity of classical communication over quantum channels, considerable effort has been devoted to finding a structural explanation of this phenomenon that was…Benjamin Lovitz, Peixue Wu·Aug 26, 2026SaveLearn
Dissipatively Stabilized 0-n Fock Qubits for Noise-Biased Quantum ComputingNoise-biased qubits have bit-flip errors that are exponentially suppressed relative to phase-flip errors, and offer a promising route toward fault-tolerant quantum computing. However, this bias can…Su Direkci, Simon Lieu, Kyungjoo Noh et al.·Aug 26, 2026SaveLearn
Position- and Momentum-Space Quantum Information Measures of the Double-Morse OscillatorWe investigate the quantum-information properties of a particle confined by the double Morse potential in position and momentum spaces. The quasi-exact solvability of the model gives analytical…Firoz Chogle, Ernesto Damiani, Berihu Teklu·Aug 26, 2026SaveLearn
Entirely nonlocal quantum magic without entanglementNonstabilizerness, or magic, is an archetypal quantum resource that is necessary for quantum computational advantage. Here we uncover a phenomenon seemingly at odds with the quantum nature of…Fuchuan Wei, Ruixia Wang, Yujia Zhang et al.·Aug 26, 2026SaveLearn
Magic of Kitaev spin liquidsQuantum spin liquids (QSLs) are long-range entangled phases of matter and a natural setting for exploring how quantum correlations generate quantum complexity. Motivated by the emergence of magic, or…Eleonora Lamma, Tim Bauer, Marcello Dalmonte et al.·Aug 26, 2026SaveLearn
Computing key rates for one-sided device-independent quantum key distributionThe defining feature of one-sided device-independent quantum key distribution is its asymmetric trust model in which only one party is characterized. This scenario sets an interesting middle ground…Andreas Bluhm, Gereon Koßmann, Martin Sandfuchs et al.·Aug 26, 2026SaveLearn
Structured Non-Locality and Emergent Locality in Cavity-QED Many-Body DynamicsCavity quantum electrodynamics (QED) modifies many-body systems by combining cavity-mediated collective interactions with microscopic short-range interactions. The resulting dynamics lies between the…Mark A. Oehlgrien, Błażej Jaworowski, Darrick E. Chang et al.·Aug 26, 2026SaveLearn
Distributed Trotterization with optimal time-scaling entanglement costDistributed architectures extend quantum simulation of many-body dynamics beyond the reach of any single processor, with shared entanglement mediating interactions between spatially separated…Tianfeng Feng, Jinzhao Sun, Yunlong Xiao et al.·Aug 26, 2026SaveLearn
How much randomness in a quantum process can be explained using memory?For a stochastic process describing observations of a dynamical system, complexity science provides systematic methods to decompose the information produced into true irreducible randomness, and that…Derek D. C. Chang, Graeme D. Berk, Mile Gu·Aug 26, 2026SaveLearn
Surpassing Gaussian optimality in multiparameter estimation with indefinite causal orderWe identify single-mode Gaussian probes, generated by displacement and squeezing operations on the vacuum state, which are optimal for the simultaneous estimation of displacement and squeezing…Sudipta Das, Rivu Gupta, Aditi Sen De et al.·Aug 26, 2026SaveLearn
Enhanced quantum metrology with robust multipass interferometryQuantum metrology typically uses entangled states to achieve measurement precisions beyond the standard quantum limit. The advantage increases with the size of the entangled state, however generating…Sayak Mukherjee, José Afonso Oliveira, Sean William Moore et al.·Aug 26, 2026SaveLearn
Fast-forwarding quantum algorithms for weakly nonlinear dissipative differential equations and beyondWe study a fast-forwarded quantum algorithm for solving weakly nonlinear dissipative ordinary differential equations. Our approach is a combination of the Carleman embedding technique and the linear…Yixiang Li, Dong An·Aug 26, 2026SaveLearn
The View from Within: What Can Embedded Observers (Not) Learn?Physics is usually done from a third-person perspective, as if the world were described from outside. Yet, observers are themselves physical systems within the world they observe. Here, we…Tomáš Gonda, Johannes Fankhauser, Gemma De les Coves·Aug 26, 2026SaveLearn
Fault-tolerant | T state preparation and injection for more efficient fine-grained quantum circuit synthesisMagic-state injection is a standard route to realize universal fault-tolerant quantum computation. Whereas the set of Clifford gates in combination with the non-Clifford T gate is a widely used…Berat Yenilen, Markus Müller, Manuel Rispler·Aug 26, 2026SaveLearn
Quantum sampling in hybrid light-matter systems with mixed statisticsBoson sampling is one of the most prominent methods to verify quantum advantage, harnessing the computational complexity of the permanent of a network matrix. Similar quantum sampling problems…Franziska Barkhausen, Laura Ares, Stefan Schumacher et al.·Aug 26, 2026SaveLearn
The Geometric Phase as a Diagnostic for Driven-Dissipative OscillatorsDriven-dissipative quantum oscillators lock their phase, deform their limit cycles, and undergo dissipative phase transitions, yet these behaviors are read from unrelated quantities defined on the…Zeen Sun, Yuan Shen, Haitao Ding et al.·Aug 26, 2026SaveLearn
Quantum motility-induced phase separationMotility-induced phase separation (MIPS) describes a central clustering phenomenon in active matter systems where particles spontaneously separate into dense and dilute phases even in the absence of…Laurin Brunner, Ricard Alert, Reyhaneh Khasseh et al.·Aug 26, 2026SaveLearn
Phase-sensitive cascade quantum amplifier with nearly noiseless operationPhase-sensitive parametric devices enable quadrature-selective amplification with the potential for sub-quantum-limited noise performance. In this work, we investigate the operation of a SQUID-based…Ilari Lilja, Ekaterina Mukhanova, Michael Perelshtein et al.·Aug 26, 2026SaveLearn
GNSS-free quantum gravity-aided navigation and fine-scale marine surveying with a strapdown quantum gravimeterGlobal navigation satellite systems (GNSS) are often disrupted or unavailable at sea, and unaided inertial navigation systems (INS) drift without correction. Quantum-sensing-based gravity map…Patrick J. Everitt, Donald H. White, Todd Lyon et al.·Aug 26, 2026SaveLearn
Certified decoding of quantum LDPC codesQuantum low-density parity-check (qLDPC) codes reduce the qubit overhead of fault-tolerant quantum computation by an order of magnitude, but their decoding is harder than its classical counterpart:…Ragavi Krishnamoorthy, Florian Gerhardt, Johannes Knaute et al.·Aug 26, 2026SaveLearn
A universal loss-limited optimum for fixed multi-pass quantum sensing per absorbed photonMulti-pass schemes send a photon through a sample several times to learn more about it. When the sample rather than the light is scarce, the natural figure of merit is the information gained per…Christoph F. Wildfeuer·Aug 26, 2026SaveLearn
Superextensive learning in quantum reservoirs at the onset of information scramblingThe idea that information processing is optimised near the boundary between order and chaos has emerged as a recurring principle across neuroscience, complex systems, and machine learning. Here we…Jonas Freiheit, Francesco Campaioli·Aug 26, 2026SaveLearn
High-Fidelity Entangled States in a Connectivity-Four Fluxonium Quantum ProcessorA central challenge in fluxonium-based quantum processors is the extension of the qubit connectivity to two-dimensional lattices compatible with quantum code-error correction. Here, we present a…J. Schirk, N. Bruckmoser, S. M. Taubenberger et al.·Aug 26, 2026SaveLearn
Low-leakage superconducting-qubit measurement with sub-100-ns total durationFast, accurate, and low-leakage qubit measurement is a key requirement for quantum error correction. Here, we demonstrate measurement of a superconducting transmon qubit with a total duration of…Peter A. Spring, Adrian L. Hesse, Shiyu Wang et al.·Aug 26, 2026SaveLearn