Phonon-assisted free-electron recoil control and mechanical sensing
A theoretical analysis shows that motion in an optomechanical membrane can control free-electron recoil through phonon-assisted light scattering and detect localized forces.
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Pure dephasing destroys two-photon amplitude, not nonlinear phase
An arXiv paper derives a closed-form expression for the two-photon amplitude of a chirally coupled emitter under pure dephasing.
The strengthened quantum Hamming bound of Yu, Lai, and Oh
A paper proves that strengthened quantum Hamming bounds conjectured by Yu, Lai, and Oh hold for every exact quantum code subspace of dimension greater than one.
Injection is all you need: parallel universal logic in high-rate concatenated self-dual codes
An arXiv preprint outlines a technique for simultaneous error-corrected operations across multiple qubits in concatenated self-dual CSS codes via state preparation and consumption.
Inaccessibility of the Cosmological Singularity to Quantum Probes
A random sampling method to test the weak Eigenstate Thermalization Hypothesis
An arXiv preprint presents a sampling technique to verify eigenstate thermalization assumptions in extensive quantum models and applies it to atomic arrays.
Hydrodynamic description of correlation matrix eigenvalues in a finite temperature expanding free fermionic gas
A paper analyzes hydrodynamic properties of correlation-matrix eigenvalues for a finite-temperature one-dimensional free fermionic gas undergoing expansion.
High-fidelity and robust controlled-Z gates for superconducting transmon qubits. I. Intrinsic errors and decoherence
An arXiv preprint outlines a control optimization method for CZ operations between coupled transmon qubits that includes decoherence and intrinsic noise effects.
Tight Bounds on the Randomized Communication Complexity of Vector-in-Subspace
An entanglement band structure for general multiqubit states
A preprint shows that projecting one qubit from a general multiqubit state yields entanglement invariants that form bands over the Bloch sphere, including exceptional points.
Two particle interference: The Hanbury Brown Twiss and Hong Ou Mandel experiments
An arXiv paper gives an overview of the Hanbury Brown Twiss and Hong Ou Mandel two-particle interference experiments and their atomic variants.
Meter-scale quantum interconnects between large quantum processors
IBM Quantum demonstrated four meter-scale couplers linking two 120-qubit superconducting processors.
International atomic clock comparison achieving 5×10⁻¹⁸ uncertainty
Researchers compared ytterbium-ion optical clocks in the UK and Germany over a 2220 km fiber link and measured their frequency difference to 4.8×10⁻¹⁸ uncertainty.
Finite Classification of Transversal Diagonal Gates Beyond Stabilizer Codes
An arXiv preprint shows that diagonal transversal gates on qubit codes of distance two or more allow complete classification via finite search.
Resource Analysis of Quantum Optimization Algorithms via Variational Methods
Researchers analyzed how entanglement and coherence evolve during variational quantum algorithms for combinatorial optimization problems.
Superconducting parametric amplifiers based on arrays of unequal Josephson junction elements
A paper presents a design for impedance matching in superconducting parametric amplifiers that employs arrays of unequal Josephson junction elements.
From Traveling Waves to Synthetic Gauge Fields: A Field-Free Route to Superconducting Diode Effect
A theoretical analysis shows that a time-periodic, spatially modulated chemical potential can break both inversion and time-reversal symmetries to produce the superconducting diode effect.
Teaching quantum mechanics in secondary schools: A qubit-first learning path to Bell's inequalities
Researchers posted an arXiv paper on an educational sequence that starts with qubits and leads high-school students to Bell inequalities.
Conservation in Every Quantum Measurement Outcome?
An arXiv preprint examines whether conservation laws hold for individual quantum measurement outcomes rather than solely in a statistical sense during unitary evolution.
Quantum Charge as a Particle/Antiparticle Label
An arXiv paper relates particle and antiparticle labels to charges of plus or minus one over h-bar under a U(1) subgroup of the Weyl-Heisenberg group.
Mamba Quantum Eigensolver (MQE): A Selective State Space Model for Scalable Ground State Simulations in Quantum Chemistry
A paper on arXiv introduces the Mamba Quantum Eigensolver, a selective state space model that replaces the Transformer in generative quantum eigensolvers for molecular ground-state calculations.
Encoding a bosonic mode into qubits for simulating boson-matter interactions
Researchers compared space-time costs and noise resilience of unary Fock, Dicke, and binary quadrature encodings for a bosonic mode in qubits via displacement and Dicke-model simulations.
Semiclassical molecular dynamics simulations of electromagnetically induced transparency cooling of 2D and 3D ion crystals in a Penning trap
Researchers extended molecular dynamics simulations to model electromagnetically induced transparency cooling of two- and three-dimensional ion crystals in Penning traps.
Quantum f-divergences from retrodiction: a unifying classical variational principle
Researchers introduced a reference prior state to generalize Matsumoto's reverse-test optimization and unify classical variational extensions of f-divergences to quantum states.
Local distinguishability of five quadripartite orthogonal product states
Researchers posted an arXiv manuscript resolving local distinguishability for five four-party orthogonal product states orthogonal in one subsystem.
Accurate Wichmann-Kroll vacuum polarization calculations with Gaussian basis set
Researchers computed the Wichmann-Kroll vacuum polarization correction for highly charged ions using Gaussian basis sets of up to 500 functions, matching the precision of standard methods.
Quantum-Enhanced Matterwave Interferometry in a Ring Waveguide
Calculations show atoms in a circular trap reach 2 dB spin squeezing after an interaction quench.
Splitting Probability in Monitored Quantum Dynamics
Researchers derived splitting probabilities via a renewal framework for first-detection amplitudes in a continuously monitored quantum walk on two targets.
A compact ultracold strontium experiment
An arXiv paper outlines a 40-centimeter strontium cooling setup that operates with a low-power oven and omits magnetic coils in the slower.
Linear Ensemble-Constrained Quantum Monte Carlo: From Dilute Fermi Gas to Flat-Band Ferromagnetism
Phase-Space Microscopes for Quantum Gases: Imaging Conjugate Variables and Momentum-Weighted Densities
One-Positron Quantum Cyclotron
Myers and colleagues reported a device that traps one positron and manipulates its quantum states for high-precision magnetic moment measurement.
Quantum Sensing Using Geometrical Phase in Qubit-Oscillator Systems
Nishchay Suri and coauthors published a protocol for quantum sensing in coupled qubit-oscillator systems that encodes signals in geometrical phase to surpass the standard quantum limit.
Experimental Tomography of Quantum Many-Body Hamiltonians in Solids via Thermalization
Researchers reported experimental reconstruction of unknown quantum many-body Hamiltonians in solids by analyzing thermalization dynamics.
Learning hidden structures in open quantum dynamics
Three physicists published a paper presenting a data-driven technique to extract concealed invariants from the evolution of open quantum systems under limited observations.
Spin-polarized transport tomography of a quantum-dot spin qubit via ferromagnetic leads
Three physicists described a method to recover the full quantum state of an electron spin in a dot by measuring currents from magnetic contacts.
Quantum architecture generation via predictor-guided diffusion models
Jiawen Dai and coauthors published a method using predictor-guided diffusion models to generate parametrized quantum circuit architectures for variational quantum algorithms in Physical Review A.
Intrinsic Hamiltonian of Mean Force and Strong-Coupling Quantum Thermodynamics
Short qudit triorthogonal codes from doubling
An arXiv paper reports constructions of compact triorthogonal codes for odd-prime qudits via an extended doubling method, including the length-28 code for dimension 3.
Quantum Belief Characterization: A Multi-Shot Notion of Equivalence
An arXiv paper develops a repeated-update version of equivalence between quantum beliefs.