Record ID

UAMee511dd76158492c93baabd54b13e490

Author

Kacper Wrześniewski Kacper Wrześniewski,, Laboratorium Eksperymentu Fizycznego [nowa struktura organizacyjna] (SNŚ/WyF/JPW)Szkoła Nauk Ścisłych [nowa struktura organizacyjna] (SNŚ)

Ireneusz Weymann Ireneusz Weymann,, Zakład Fizyki Mezoskopowej [nowa struktura organizacyjna] (SNŚ/WyF/JBWF)Szkoła Nauk Ścisłych [nowa struktura organizacyjna] (SNŚ)

N. Sedlmayr N. Sedlmayr,, Undefined Affiliation

T. Domański T. Domański,, Undefined Affiliation

Journal series

Physical Review B, ISSN 2469-9950, e-ISSN 2469-9969, [1538-4489, 1098-0121]

Issue year

2022

Vol

105

No

9

Article number

094514

Keywords in original language

Dynamical phase transitions ; Mesoscopics ; Superconductivity

ASJC Classification

2504 Electronic, Optical and Magnetic Materials; 3104 Condensed Matter Physics

Abstract in original language

We inspect the signatures of dynamical quantum phase transitions driven by quantum quenches acting on a correlated quantum dot embedded between superconducting and metallic reservoirs. Under stationary conditions, the proximity-induced electron pairing, competing with strong Coulomb repulsion, enforces the quantum dot to be either in the singly occupied or BCS-type ground state, depending on its energy level and coupling to the superconducting lead. By means of the time-dependent numerical renormalization group approach, we study the system's time evolution upon traversing the phase boundary between these two states, examining the Loschmidt echo and revealing nonanalytic features in the low-energy return rate, which signal dynamical quantum phase transitions. We also show that these phase transitions are accompanied by the corresponding local extrema in the pairing correlation function and dot's occupation. Since the proposed quench protocols can be realized in a controllable manner, the detection of this dynamical singlet-doublet phase transition should be feasible by performing tunneling spectroscopy measurements.

DOI

DOI:10.1103/physrevb.105.094514 Opening in a new tab

Language

eng (en) English

Score (nominal)

140

Score source

journalList

Score

Ministerial score = 140.0, 28-03-2022, ArticleFromJournal

Publication indicators

Scopus SNIP: 2017 = 1.040; WoS Impact Factor: 2019 (2 years) = 3.575 - 2019 (5 years) =3.511

Citation count

1

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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.