Video Experimental Relacionado
Updated: Jan 8, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.2K
Avalanchas cuánticas en una cadena de Majorana de Ising interactiva que conserva [Fórmula: ver texto]
Lv Zhang1,2, Kai Xu3, Heng Fan3
1Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Beijing, 100190, China. zhanglv@iphy.ac.cn.
Scientific reports
|December 19, 2025
Resumen
Las fases localizadas de muchos cuerpos (MBL) en sistemas cuánticos son inestables en tamaños finitos debido a efectos de avalancha de regiones de termalización. Este estudio muestra que tanto las fases paramagnéticas como las de espín vítreo de MBL se vuelven inestables en estas condiciones.
Área de la Ciencia:
- Física de la Materia Condensada
- Sistemas Cuánticos de Muchos Cuerpos
- Sistemas Desordenados
Sus antecedentes:
- Estudios numéricos recientes destacan la inestabilidad de la fase localizada de muchos cuerpos (MBL) en sistemas cuánticos desordenados de tamaño finito.
- Esta inestabilidad se atribuye a raras regiones de Griffiths que se termalizan y desencadenan un mecanismo de avalancha, desestabilizando las regiones MBL circundantes.
Objetivo del estudio:
- Investigar las características dinámicas de una cadena de Majorana de Ising interactiva que conserva [Fórmula: ver texto] acoplada a un baño infinito bajo perturbación.
- Determinar cómo el mecanismo de avalancha afecta la fuerza de desorden crítica en sistemas de tamaño finito analizando el comportamiento de escalamiento de la tasa de termalización más lenta.
- Sondear la difusión de burbujas térmicas utilizando un modelo de inclusión incrustada y la evolución temporal de la información mutua.
Principales métodos:
- Simulaciones numéricas de una cadena de Majorana de Ising interactiva que conserva [Fórmula: ver texto].
- Análisis del comportamiento de escalamiento de la tasa de termalización más lenta para comprender el impacto del mecanismo de avalancha en la fuerza de desorden crítica.
- Implementación del modelo de inclusión incrustada y la evolución temporal de la información mutua para rastrear la difusión de burbujas térmicas.
Principales resultados:
- Se demuestra que la fuerza de desorden crítica en sistemas de tamaño finito se ve afectada por el mecanismo de avalancha.
- El modelo de inclusión incrustada revela la difusión de burbujas térmicas originadas en regiones de Griffiths.
- En sistemas de tamaño finito, se observa que la fuerza de desorden crítica se aleja gradualmente del centro.
Conclusiones:
- Se demuestra que tanto la fase paramagnética MBL como la fase de espín vítreo MBL son inestables en tamaños finitos.
- Los hallazgos subrayan la importancia de considerar los efectos de tamaño finito y los mecanismos de avalancha al estudiar las fases MBL.
Videos de Conceptos Relacionados
02:45The Quantum-Mechanical Model of an Atom
56.4K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
56.4K
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
3.9K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.9K
01:17Spin–Spin Coupling: One-Bond Coupling
1.4K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.4K
01:10First Law: Particles in One-dimensional Equilibrium
7.9K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
7.9K
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.6K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.6K
02:58Crystal Field Theory - Octahedral Complexes
30.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
30.5K