Specialty
A hybrid quantum-classical system was judged stronger than three classical generators on synthetic MDS data in a seven-variable proof of concept. The reported result concerns model-quality metrics, not clinical outcomes.
Scientific publication4 min read
Researchers used fiber-distributed, time-bin-entangled photon pairs to run a Bell test with random measurement settings. The reported result addressed locality, setting choice and postselection, but not the detection loophole.
Scientific publication4 min read
A modeling preprint finds that the lowest quasi-exact ground state of a double-well oscillator remains centered, while changing the phase-space representation alters the visible quantum structure.
Scientific publication3 min read
A theoretical preprint argues that Fourier and Pontryagin duality fix the form of the position-momentum pairing, while a physical commutation rule fixes its scale.
Scientific publication3 min read
A preprint models a multimode cavity, a Bose-Einstein condensate and a trapped two-level atom as a tunable Unruh-DeWitt detector. Its calculations report stronger response at low uniform linear acceleration, while circular motion shows a different, nonthermal pattern.
Scientific publication4 min read
A theoretical quantum-information study finds that exact localization of one changing interval has the same large-sequence success limit under the optimal collective measurement and a square-root measurement, across several interval-length settings.
Scientific publication5 min read
A mathematical analysis links equal-weight magic-witness thresholds in codeword-stabilized quantum codes to the affine geometry of their classical word sets. It gives exact lower bounds for selected examples and a family-level formula, but leaves the larger Rains family without a scalable algorithm.
Scientific publication4 min read
A study compares small entangled photon states in a lossy multipass interferometer and reports that rotated NOON outperformed NOON and BAT, while marginally outperforming flat in the stated settings.
Scientific publication4 min read
An ideal state-vector benchmark found that the best quantum encoding changed with the dataset, and that dense circuits sometimes fit training data far better than test data.
Scientific publication4 min read
A computational quantum study combines operator backpropagation with two measurement protocols and finds that the lower-shot choice depends on the circuit and observable set.
Scientific publication4 min read
A methods preprint compares decomposed and naive quantum-walk circuits, with lower model-based CNOT upper bounds in selected one-dimensional and torus-graph examples.
Scientific publication3 min read
A mathematical study of quantum encodings finds an exact worst-case margin in a dense Majorana model, while broader bounds show how decoding and measurement costs enter the tradeoff.
Scientific publication4 min read
A laboratory study reports that two molecules embedded in helium nanodroplets kept rotating beyond expected centrifugal limits, while their alignment signals pointed to markedly different effective thermalization times.
Scientific publication4 min read
A theoretical study identifies a direct-basis and equatorial-basis analyzer pair that jointly screens two multipair false-herald classes, then compares three- and four-source networks with matched all-BSM designs under modeled loss and multiplexing.
Scientific publication5 min read
A laboratory experiment used entangled photons and a polarization-coupling metasurface to reveal several measured topological states, including up to three states selected from one device.
Scientific publication4 min read
A theoretical model treats temperature as part of the mathematical description of spin transport in a ferromagnet. It finds only a slight change in the proposed gauge potential across the tested temperatures, while the modeled magnetization pattern changes more visibly.
Scientific publication3 min read
A theoretical preprint associates competing coordinate-like and momentum-like soft modes with tunable multicritical structures, with distinct signatures in excitation stability and ground-state responses.
Scientific publication4 min read
A computational study found that activation-selection networks could fit parameter-dependent quantum energy levels with compact formulas, while fixed-basis quadratic regression remained as accurate or slightly better.
Scientific publication4 min read
A laboratory demonstration on one transmon from a 64-qubit processor reported a 97(1)-nanosecond operational measurement duration, 0.17(1)% two-state assignment error, and mean leakage of 2.7(2) × 10^-5 per measurement at the assignment optimum.
Scientific publication4 min read
A preprint describes a five-qubit fluxonium-resonator-fluxonium processor with connectivity-four wiring. It reports near-coherence-limited single-qubit gates, a refocused two-qubit result with no measured spectator-state dependence beyond statistical uncertainty, and a five-qubit GHZ fidelity of 90.0(2)%.
Scientific publication4 min read
A computational study of disordered Ising spin networks found that forecasting precision and collective-relaxation memory scaled fastest near the onset of information scrambling, while the effect depended on forecast horizon and remains untested on hardware.
Scientific publication4 min read
A theoretical arXiv analysis identifies a conditional peak in information gained per photon absorbed by an object. Within its fixed schemes, one recycled photon is favored, but adaptive strategies can lie beyond the reported ceiling.
Scientific publication3 min read
A new preprint reports that an approximate quantum-error decoder closely matched exact maximum-likelihood decisions in several simulations, but larger-code and hardware tests revealed clear boundaries.
Scientific publication5 min read
A field test paired atom-based gravity sensing with inertial navigation without GNSS and recorded repeatable maritime gravity profiles, including anomalies at roughly 300-metre along-track scale.
Scientific publication4 min read
A laboratory characterization found 0.06 input-referred photons of added noise in phase-sensitive operation, compared with 0.71 photons in phase-preserving operation.
Scientific publication4 min read
A one-dimensional open-system simulation found finite clusters that retained quantum coherence. Adding nearest-neighbor repulsion was associated with numerical evidence compatible with genuine phase separation, but the extended model was too small for reliable fluctuation scaling.
Scientific publication3 min read
A new arXiv preprint proposes using a mixed-state geometric phase to track how two modeled quantum oscillators reorganize as their dynamics approach synchronization and critical regimes. The analysis finds distinct response patterns in the models, but the proposed measurement remains untested.
Scientific publication4 min read
A mathematical preprint describes hybrid quantum networks whose modeled output probabilities use matrix functions beyond determinants and permanents, with quasiparticle expressions that include non-permutation terms.
Scientific publication3 min read
A computational study found that adding a modeled fault-tolerant √T injection primitive was associated with lower average costs in a finite, noisy single-qubit synthesis benchmark, despite the primitive’s higher assigned cost.
Scientific publication5 min read
A mathematical study of embedded observers in a deterministic classical model finds that limits on learning can arise even without quantum mechanics. The result depends on what an observer can record, what information is available before an interaction, and whether the goal is to reconstruct the past or predict the future.
Scientific publication4 min read
A quantum algorithm for selected nonlinear differential equations has a theoretical query bound with no explicit dependence on evolution time, but its guarantee relies on restrictive assumptions and model-specific numerical tests.
Scientific publication4 min read
A new arXiv preprint reports regime-dependent gains from indefinite causal order, while showing that non-Gaussianity alone does not explain them.
Scientific publication4 min read
A theoretical framework separates long-run quantum entropy growth from finite-window randomness that temporal correlations can eventually explain.
Scientific publication4 min read
An analytical study proposes a quantum-simulation protocol whose expected entanglement cost grows linearly with evolution time while remaining independent of Trotter step count and target accuracy in the analyzed setting.
Scientific publication4 min read
An analytical study of two cavity-QED spin models proposes that the states retained by a cavity can help organize whether projected interactions remain local or become structured and non-local.
Scientific publication4 min read
A theoretical study finds that where trust is placed in one-sided quantum key distribution can change modeled rates, with different protocols favoring different assignments.
Scientific publication3 min read
A preprint reports that quantum “magic” can be encoded in separable correlations, with experiments testing whether classical keys or cooperation can control access to it.
Scientific publication4 min read
A theoretical preprint reports opposing position- and momentum-space trends as a double-Morse particle model is varied from separated wells toward a merged well. Its calculations cover the ground and first excited states.
Scientific publication4 min read
A mathematical construction uses permutation-generated quantum channels to approach a free-compression entropy benchmark while retaining a strict two-copy minimum-output-entropy inequality.
Scientific publication4 min read
A computational study predicts that a proposed multilevel qubit could preserve a strong imbalance between bit-flip and phase-flip errors during controlled operations, while its headline results remain untested in hardware.
Scientific publication4 min read