Effective low-energy models for superconducting impurity systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00571929" target="_blank" >RIV/68378271:_____/23:00571929 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10468726

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.107.155111" target="_blank" >https://doi.org/10.1103/PhysRevB.107.155111</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.107.155111" target="_blank" >10.1103/PhysRevB.107.155111</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effective low-energy models for superconducting impurity systems

Popis výsledku v původním jazyce

We present two complementary methods to calculate the Andreev bound state energies of a single-level quantum dot connected to superconducting leads described by the superconducting impurity Anderson model. The first method, which is based on a mapping to a low-energy model, can be utilized to extract the Andreev bound state energies from finite-temperature, imaginary-time quantum Monte Carlo data without the necessity of any analytic continuation technique. The second method maps the full model on an exactly solvable superconducting atomic limit with renormalized parameters. As such, it represents a fast and reliable method for a quick scan of the parameter space. We demonstrate that after adding a simple band correction this method can provide predictions for measurable quantities, including the Josephson current, that are in a solid quantitative agreement with precise results obtained by the numerical renormalization group and quantum Monte Carlo.

Název v anglickém jazyce

Effective low-energy models for superconducting impurity systems

Popis výsledku anglicky

We present two complementary methods to calculate the Andreev bound state energies of a single-level quantum dot connected to superconducting leads described by the superconducting impurity Anderson model. The first method, which is based on a mapping to a low-energy model, can be utilized to extract the Andreev bound state energies from finite-temperature, imaginary-time quantum Monte Carlo data without the necessity of any analytic continuation technique. The second method maps the full model on an exactly solvable superconducting atomic limit with renormalized parameters. As such, it represents a fast and reliable method for a quick scan of the parameter space. We demonstrate that after adding a simple band correction this method can provide predictions for measurable quantities, including the Josephson current, that are in a solid quantitative agreement with precise results obtained by the numerical renormalization group and quantum Monte Carlo.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA22-22419S" target="_blank" >GA22-22419S: Molekulární spintronika: řízení spin-orbitálních polí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

107

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

155111

Kód UT WoS článku

000970293900004

EID výsledku v databázi Scopus

2-s2.0-85152125659