Papers
Live trends in quantum computing research, updated daily from arXiv.
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Quantum Memory and Autonomous Computation in Two Dimensions
Gesa Dünnweber, Georgios Styliaris, Rahul Trivedi·Jan 28, 2026
Standard approaches to quantum error correction (QEC) require active maintenance using measurements and classical processing. The possibility of passive QEC has so far only been established in an unphysical number of spatial dimensions. In this work,...
Semiclassical effective description of a quantum particle on a sphere with non-central potential
Guillermo Chacon-Acosta, H. Hernandez-Hernandez, J. Ruvalcaba-Rascon·Jan 28, 2026
We develop a semiclassical framework for studying quantum particles constrained to curved surfaces using the momentous quantum mechanics formalism, which extends classical phase-space to include quantum fluctuation variables (moments). In a spherical...
Neural Quantum States in Mixed Precision
Massimo Solinas, Agnes Valenti, Nawaf Bou-Rabee +1 more·Jan 28, 2026
Scientific computing has long relied on double precision (64-bit floating point) arithmetic to guarantee accuracy in simulations of real-world phenomena. However, the growing availability of hardware accelerators such as Graphics Processing Units (GP...
Millisecond spin coherence of electrons in semiconducting perovskites revealed by spin mode locking
Sergey R. Meliakov, Evgeny A. Zhukov, Vasilii V. Belykh +4 more·Jan 28, 2026
Long spin coherence times of carriers are essential for implementing quantum technologies using semiconductor devices for which, however, a possible obstacle is spin relaxation. For the spin dynamics, decisive features are the band structure, crystal...
A Zero-Range Model for the Efimov Effect in the Born-Oppenheimer Approximation
G. Basti, D. Ferretti, A. Teta·Jan 28, 2026
In this note we discuss the Efimov effect emerging in a three-particle quantum system with zero-range interactions. In particular, we consider two non-interacting identical bosons plus a different lighter particle such that the interaction between a ...
Spectrum-generating algebra and intertwiners of the resonant Pais-Uhlenbeck oscillator
Andreas Fring, Ian Marquette, Takano Taira·Jan 28, 2026
We study the quantum Pais-Uhlenbeck oscillator at the resonant (equal-frequency) point, where the dynamics becomes non-diagonalisable and the conventional Fock-space construction collapses. At the classical level, the degenerate system admits more th...
Entangled photon pair excitation and time-frequency filtered multidimensional photon correlation spectroscopy as a probe for dissipative exciton kinetics
Arunangshu Debnath, Shaul Mukamel·Jan 28, 2026
In molecular aggregates, multiple delocalized exciton states interact with phonons, making the state-resolved spectroscopic monitoring of dynamics challenging. We propose a protocol that combines photon-entanglement-enhanced narrowband excitation of ...
Co-Designed Adaptive Quantum State Preparation Protocols
Mafalda Ramôa, Luis Paulo Santos, Nicholas J. Mayhall +2 more·Jan 28, 2026
We propose a co-designed variant of ADAPT-VQE (Co-ADAPT-VQE) where the quantum hardware is taken into account in the construction of the ansatz. This framework can be readily used to optimize state preparation circuits for any device, addressing shor...
Quantum Squeezing Enhanced Photothermal Microscopy
Pengcheng Fu, Xiao Liu, Siming Wang +10 more·Jan 28, 2026
Label-free optical microscopy through absorption or scattering spectroscopy provides fundamental insights across biology and materials science, yet its sensitivity remains fundamentally limited by photon shot noise. While recent demonstrations of qua...
Rydberg Receivers for Space Applications
Gianluca Allinson, Mark Bason, Alexis Bonnin +10 more·Jan 28, 2026
Rydberg-atom sensors convert radiofrequency, microwave and terahertz fields into optical signals with SI-traceable calibration, high sensitivity, and broad tunability. This review assesses their potential for space applications by comparing five gene...
Foundations of Quantum Optics for Quantum Information: Crash Course on Nonclassical States and Quantum Correlations
Jhoan Eusse, Esteban Vasquez, Tom Rivlin +1 more·Jan 28, 2026
Nonclassical states of light and their correlations lie at the heart of quantum optics, serving as fundamental resources that underpin both the exploration of quantum phenomena and the realisation of quantum information protocols. These lecture notes...
Enhanced quantum parameter estimation based on the Hardy paradox
Ming Ji, Yuxiang Yang, Holger F. Hofmann·Jan 28, 2026
Statistical paradoxes such as the Hardy paradox and the enhancement of phase estimation via post-selection both draw upon the same non-classical features of quantum statistics described by non-positive quasi-probabilities. In this paper, we introduce...
A Hybrid Jump-Diffusion Model for Coherent Optical Control of Quantum Emitters in hBN
Saifian Farooq Bhat, Michael K. Koch, Sachin Negi +2 more·Jan 28, 2026
Hexagonal boron nitride (hBN) has emerged as a promising two-dimensional host for stable single-photon emission owing to its wide bandgap, high photostability, and compatibility with nanophotonic integration. We present a simulation-based study of te...
Time complexity of a monitored quantum search with resetting
Emma C. King, Sayan Roy, Francesco Mattiotti +3 more·Jan 28, 2026
Searching a database is a central task in computer science and is paradigmatic of transport and optimization problems in physics. For an unstructured search, Grover's algorithm predicts a quadratic speedup, with the search time $τ(N)=Θ(\sqrt{N})$ and...
Detector's response to coherent Rindler and Minkowski photons
Pradeep Kumar Kumawat, Dipankar Barman, Bibhas Ranjan Majhi·Jan 28, 2026
We observe that the transition probability in a static two-level quantum detector interacting with a coherent Rindler photon is different from the same of the Rindler detector which is in interaction with a coherent Minkowski photon. Situation does n...
Gravitational wave detection via photon-graviton scattering and quantum interference
K. Hari, S. Shankaranarayanan·Jan 28, 2026
We present a fully quantum field-theoretic framework for gravitational wave (GW) detection in which the interaction is described as photon-graviton scattering. In this picture, the GW acts as a coherent background that induces inelastic energy exchan...
A Unified Symmetry Classification of Many-Body Localized Phases
Yucheng Wang·Jan 28, 2026
Anderson localization admits a complete symmetry classification given by the Altland-Zirnbauer (AZ) tenfold scheme, whereas an analogous framework for interacting many-body localization (MBL) has remained elusive. Here we develop a symmetry-based cla...
Will we ever quantize the center of mass of macroscopic systems? A case for a Heisenberg cut in quantum mechanics
Gabriel H. S. Aguiar, George E. A. Matsas·Jan 28, 2026
The concept of quantum particles derives from quantum field theory. Accepting that quantum mechanics is valid all the way implies that not only composite particles (such as protons and neutrons) would be derived from a field theory, but also the cent...
Three-body scattering area of identical bosons in two dimensions
Junjie Liang, Hongye Yu, Shina Tan·Jan 28, 2026
We study the wave function $φ^{(3)}$ of three identical bosons scattering at zero energy, zero total momentum, and zero orbital angular momentum in two dimensions, interacting via short-range potentials with a finite two-body scattering length $a$. W...
Revisiting the Interpretations of Quantum Mechanics: From FAPP Solutions to Contextual Ontologies
Philippe Grangier·Jan 28, 2026
This note presents a concise and non-polemical comparison of several major interpretations of quantum mechanics, with a particular emphasis on the distinction between FAPP-solutions ("For All Practical Purposes'') versus ontological solutions to the ...