Quantum Physics · Physics & Astronomy
Quantum Physics
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3,630 papers, from 4 September 2026 to 5 November 2026: 3,630 arXiv preprints.
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Newest papers, page 160
Preparation Changes the Cost of Calibration for Quantum Control
Error-correction records can reveal noise yet supply the information needed for control too slowly.Non-factor quantum dynamics and relativity
We consider the effect of relativistic principles on the structure of the local evolutions of non-factor quantum systems such as those which naturally arise in quantum spacetimes and causal…Active-Space Quantum Simulation of N$_2$ Hydrogenation at a Ru Single-Atom Site on Ru(0001)
Selective activation of dinitrogen (N$_2$) under mild conditions is difficult: N$\equiv$N is one of the strongest bonds in chemistry, and most heterogeneous catalysts capable of breaking it require…Solving Graph Coloring Problems Using Feedback-Based Algorithm for Quantum Optimization
The feedback-based algorithm for quantum optimization (FALQON), which is an extension of the quantum approximate optimization algorithm (QAOA), is a promising approach for finding approximate…When Can Quantum Extreme Learning Machines Replace Quantum Reservoirs?
Quantum reservoir computers (QRCs) retain information from earlier inputs, whereas reset-window quantum extreme learning machines (QELMs) start afresh and receive only a recent input window.Single-shot coherent process tomography and mid-infrared polarimetry with undetected photons
Measurements with undetected photons infer properties of a probe beam that is never detected, transferring mid-infrared information onto silicon-friendly wavelengths.Computational aberration-retrieval with entangled photons
Adaptive optics (AO) is central to high-resolution microscopy, yet conventional implementations often require repeated correction-and-measurement cycles whose number increases with aberration…Measurement protocol for non-adiabatic geometric phases of Floquet states
Periodically time-dependent quantum systems have Floquet solutions.Modeling quantum neural network gradient with reinforcement learning
Training quantum neural networks (QNNs) on near-term hardware remains hampered by two compounding difficulties: the exponential vanishing of gradient variance known as the barren plateau, and the…Feedback cooling of a levitated nanoparticle in a radially polarized vector beam trap
We demonstrate optical levitation and feedback cooling of a silica nanoparticle (radius = 78~nm) trapped within a radial vector beam (RVB) in high vacuum.Quantum Diffusion Models for Medical Image Analysis
Quantum Machine Learning is a novel field of research aimed at devising machine learning approaches exploiting principles of quantum mechanics, such as superposition, entanglement and interference.On the applicability of Kolmogorov's theory of probability to the description of quantum phenomena. Part II: Bell inequalities
Among the various "no-go theorems" in the foundations of quantum mechanics, Bell inequalities are among the few, which do not implicitly rely on the mathematical structure of quantum mechanics.Quantum Approximate Optimisation Algorithm for Protein Sidechain Packing
Sidechain packing is a critical stage in protein folding, with direct implications for structure-based drug discovery.Supporting functionals and singular boundary geometry of two-qubit entanglement of formation
We give a criterion for the existence of a global supporting affine functional for the entanglement of formation at an entangled two-qubit state.High-gain vortex transfer via activated forbidden transitions in molecular magnets
Vortex light has garnered considerable interest in recent years owing to its distinctive properties and broad application potential.Phase-accumulating hyperfine strain sensing with rare-earth-ion phase memories
Long-lived hyperfine coherences in rare-earth-ion crystals provide controlled phase evolution windows for metrology.Optical characterization of excited-state spin Hamiltonians and clock transitions at telecommunication wavelength in Tm3+:YAlO3
The zero-phonon line (ZPL) between the two excited-state manifolds 3F4 and 3H4 of the trivalent thulium ion in yttrium aluminum perovskite (Tm3+:YAlO3) lies within the telecom E-band at around 1451…Bypassing no-go theorems on mixed classical-quantum systems: the (counter)example of hybrid van Hove theory
Motivated by models of mixed quantum-classical hybrid theories, we consider the representation of classical observables as Hilbert-space operators based on van Hove's unitary representation of…Distinct Feedback-Strength Requirements for Quantum-State Ensemble Preparation under Channel-Equivalent Monitoring
Different measurements of the same environment can preserve the average quantum channel yet change the feedback strength needed to prepare a state ensemble.Quantum interaction can superactivate cheating under parallel repetition
We study interactive multiprover games and many-round protocols in which the communication between the verifier and the provers is quantum.