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Física de la materia condensada

La física de la materia sólida y líquida, que incluye los semiconductores, los superconductores, el magnetismo, las transiciones de fase, la nanofísica y los materiales cuánticos

11 artículos

Artículos

Sensing and Control of Single Trapped Electrons Above 1 Kelvin

This paper presents a novel method for detecting and controlling single electrons trapped on liquid helium at temperatures above 1 Kelvin, a significant step towards more practical quantum computing environments. Using a superconducting resonator, researchers observed frequency shifts corresponding to the loading and unloading of individual electrons, with these experimental results aligning well with their classical coupling model. This advancement provides a foundation for developing large-scale quantum processors that can operate with higher cooling powers than traditional millikelvin systems.

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Física de la materia condensada 12 oct 2025, 8:49:08

Breaking the Curse of Dimensionality: Solving Configurational Integrals for Crystalline Solids by Tensor Networks

This paper introduces a novel tensor network approach, utilizing tensor-train (TT) decomposition and TT-cross interpolation, to efficiently calculate high-dimensional configurational integrals for crystalline solids. The method reformulates complex summations into computationally tractable sequences, accurately reproducing molecular dynamics simulation results for materials like copper, argon, and tin within seconds, thus overcoming the 'curse of dimensionality' in statistical mechanics. Its current application is primarily limited to crystalline solids with identical particles.

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Física de la materia condensada 1 oct 2025, 8:20:05

Electromagnetic scattering by a partially graphene-coated dielectric cylinder : efficient computation and multiple plasmonic resonances

This paper introduces an efficient computational method to model how light scatters off a dielectric cylinder partially coated with graphene. The researchers found multiple "plasmonic resonances," meaning the graphene-coated cylinder scattered light very strongly at specific wavelengths, linked to surface waves on the structure.

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Física de la materia condensada 11 sept 2025, 21:57:14

Universal quantum computation using Ising anyons from a non-semisimple topological quantum field theory

This theoretical study introduces a new approach to topological quantum computation using 'non-semisimple' anyons, claiming they offer a more powerful way to build a quantum computer. While the theory relies on a modification of quantum mechanics that currently has no physical realization, it suggests new possibilities for quantum computing using the same anyon types thought to exist in experimentally observed fractional quantum Hall systems.

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Física de la materia condensada 5 ago 2025, 15:26:33

Finite-temperature transport in one-dimensional quantum lattice models

This review examines how heat and spin flow in 1D quantum systems, especially those with special mathematical properties (integrable models) like the Heisenberg and Hubbard models. It covers recent theoretical and computational advances like Generalized Hydrodynamics, explaining how these systems can be surprisingly good conductors even when strongly interacting, sometimes displaying exotic phenomena like "superdiffusion."

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Física de la materia condensada 14 jul 2025, 17:25:35

Time-reversal symmetry-breaking charge order in a kagome superconductor

This study uses muon spin relaxation to demonstrate time-reversal symmetry breaking associated with charge order in the kagome superconductor KV3Sb5. This charge order enhances the internal magnetic field width sensed by muons and persists into the superconducting state, which itself exhibits a multi-gap nature with a Tc/λab ratio comparable to unconventional high-temperature superconductors.

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Física de la materia condensada 14 jul 2025, 17:25:18

Terahertz detection based on nonlinear Hall effect without magnetic field

This paper proposes a new method for broadband terahertz detection using the nonlinear Hall effect in non-centrosymmetric quantum materials. The method utilizes the quadratic relationship between transverse current and input voltage to rectify terahertz radiation without any diode, offering potential advantages like zero threshold voltage, fast response speed, and high cutoff frequency.

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Física de la materia condensada 14 jul 2025, 17:24:39

Quantum regression in dephasing phenomena

This paper investigates the validity of quantum regression for a specific class of quantum systems that induce phase-damping. The analysis reveals that nontrivial phase-damping and quantum regression are only compatible when parts of the total system-bath Hamiltonian don't commute. The study focuses on scenarios like the spin-boson model, exploring coupling functions where quantum regression holds exactly or approximately, especially under specific limits like "flat" coupling.

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Física de la materia condensada 14 jul 2025, 17:07:30

Carving out OPE space and precise O(2) model critical exponents

This paper develops new numerical bootstrap methods, including a "cutting surface" algorithm for scanning OPE coefficients, and applies them to the 3D O(2) model. The results improve the precision of scaling dimension calculations, further supporting Monte Carlo simulations over experimental findings and providing refined estimates for several OPE coefficients.

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Física de la materia condensada 14 jul 2025, 6:54:47