Condensed Matter Physics

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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Condensed Matter Physics Oct 12, 08:49 AM

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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Condensed Matter Physics Oct 01, 08:20 AM

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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Condensed Matter Physics Sep 11, 09:57 PM

Space-time crystals from particle-like topological solitons

Researchers created continuous space-time crystals (CSTCs) in a nematic liquid crystal using constant, ambient-power light. These CSTCs, made of topological solitons, spontaneously break time-translation symmetry and are robust against perturbations, meeting criteria for time crystal classification.

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Condensed Matter Physics Sep 06, 08:03 AM

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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Condensed Matter Physics Aug 05, 03:26 PM

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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Condensed Matter Physics Jul 14, 05:25 PM

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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Condensed Matter Physics Jul 14, 05:25 PM

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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Condensed Matter Physics Jul 14, 05:24 PM

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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Condensed Matter Physics Jul 14, 05:07 PM

The 2020 UV emitter roadmap

This roadmap summarizes the state-of-the-art in UV emitter technology, focusing on the (Al,In,Ga)N material system. It highlights key challenges such as improving light output power, operation voltage, and long-term stability, especially for UVB and UVC emitters, and discusses potential solutions and future research directions.

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Condensed Matter Physics Jul 14, 06:54 AM

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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Condensed Matter Physics Jul 14, 06:54 AM