1134 papers
This study demonstrates that the iterative qubit coupled-cluster (iQCC) algorithm, simulated at unprecedented scale on classical hardware, achieves superior accuracy over leading classical methods for predicting the excited states of complex organometallic compounds, thereby establishing a threshold of approximately 200 logical qubits where quantum advantage in computational chemistry may emerge.
The paper introduces "El Agente Cuántico," a multi-agent AI system that automates complex quantum simulation workflows by translating natural-language scientific intent into validated computations across diverse software frameworks, thereby lowering technical barriers and enabling more autonomous exploration of quantum systems.
This paper investigates the feasibility of extracting infinite-volume scattering phase shifts on quantum computers using a one-dimensional trapped system model, demonstrating that while the method yields accurate results with two qubits on IBM hardware, it currently fails with three qubits due to gate operation and thermal relaxation errors.
This study demonstrates that EPR steering serves as a vital, consumable resource and a novel indicator for monitoring energy dynamics in quantum batteries with shared reservoirs, where it is initially stored and later utilized to sustain enhanced energy storage and extractable work across various charging regimes.
This paper reports the first deployed two-node hybrid quantum network operating entirely in the telecom C-band without frequency conversion, achieved by integrating a high-performance neutral atom single-photon source with a solid-state rare-earth quantum memory to enable efficient, long-distance quantum communication with high multimode capacity and preserved non-classicality.
This paper presents an accessible model of a bolometer detector in an atom interferometer to demonstrate how the Many-Worlds Interpretation consistently accounts for single-outcome observer experiences and local interactions without action at a distance, while remaining fully aligned with standard quantum mechanical predictions.
This paper demonstrates that the failure of the quantum-inspired Matrix Product State approach to solve 3-SAT via imaginary time propagation is fundamentally caused by classical computational complexity, specifically the hardness of the #3-SAT counting problem, which manifests as an entanglement barrier and necessitates superlinear non-stabilizer resources.
This paper introduces QUnfold, an open-source framework that reformulates the High-Energy Physics unfolding problem as a Quadratic Unconstrained Binary Optimization (QUBO) task, enabling competitive reconstruction accuracy through both classical solvers and quantum-compatible methods like D-Wave's hybrid solver.
This paper demonstrates that second-order dispersion induces a gain-dependent spectral shift in type-II parametric down-conversion, causing a transition from degenerate to non-degenerate photon pair generation in the high-gain regime—a critical effect that rigorous coupled integro-differential models capture but standard spatially-averaged approximations fail to reproduce.
This paper introduces a semidefinite machine learning framework that combines input convex neural networks with semidefinite programming to learn a data-driven, vertex-based approximation of the -representable two-electron reduced density matrix (2-RDM) boundary, enabling direct variational calculations with accuracy comparable to higher-order positivity constraints but at the computational cost of two-positivity methods.
This paper presents a general measurement protocol that enables the in-situ characterization of light-matter coupling to individual photonic modes in complex multimode circuit-QED systems by leveraging AC-Stark and Kerr effects, thereby eliminating the need for single-photon resolution or calibration, and validates the method using a superconducting transmon qubit coupled to a microwave resonator lattice.
This paper proposes a two-dimensional matter-wave interferometer using nitrogen-vacancy center nanodiamonds in a Stern-Gerlach setup, demonstrating that imparting external rotation provides gyroscopic stability to overcome the "Humpty-Dumpty" problem and enhance spin contrast while creating a spatial superposition of approximately 0.21 μm for a 10⁻¹⁷ kg mass in under 0.013 seconds.
This paper demonstrates the deterministic optical charging and electrical tuning of a quantum dot molecule to create spin-photon interfaces, revealing remarkably long spin-relaxation times and confirming the system's potential for generating multidimensional photonic cluster states.
This study identifies the long-unresolved I donor in ZnO as a Sn--Li complex, demonstrating its large hyperfine interaction and favorable energetics through combined experimental spectroscopy and theoretical calculations, thereby establishing a robust platform for spin-photon quantum technologies.
This paper resolves the inability of staggered-fermion discretizations to support topological phases in (2+1)D Hamiltonian lattice QED by demonstrating that Wilson fermions naturally enable nontrivial topological regimes with nonzero Chern numbers, which are characterized through gauge-invariant diagnostics and exact diagonalization to provide a foundation for near-term quantum simulations.
This paper introduces a categorical notion of "explanation" between probabilistic models using spans, demonstrating that every locally-finite probabilistic theory admits a canonical, sharp classical representation through a functorial construction.
This paper proposes and experimentally validates a quantum wavemetry scheme using an M-coupled Mach-Zehnder interferometer architecture that leverages the coherence de Broglie wavelength to achieve superresolution and loss-tolerant sensing with high fringe visibility, offering a practical alternative to N00N state-based methods.
This paper provides a complete analytical characterization of localization in continuous-time quantum walks on highly symmetric barbell and star-of-cliques graphs, revealing that the interplay between spectral degeneracy and modular structure governs confinement dynamics and enables connectivity-based predictions of quantum transport outcomes.
This paper introduces RESOLUTE, a novel Ramsey correlation spectroscopy protocol utilizing phase cycling and population imbalance storage that extends effective coherence time beyond the standard limit, enabling the detection of low-frequency signals such as C nuclear spin precession in regimes previously inaccessible to single quantum sensors.
This paper establishes rigorous bounds demonstrating that the classical simulability of quantum operators via matrix-product operators is determined by the scaling of their local-operator entanglement, where logarithmic growth of Rényi entropies for guarantees efficient approximation while volume-law scaling for precludes it.