transparent gif

 

Ej inloggad.

Göteborgs universitets publikationer

Nonequilibrium critical scaling in quantum thermodynamics

Författare och institution:
A. Bayat (-); T. J. G. Apollaro (-); S. Paganelli (-); G. De Chiara (-); Henrik Johannesson (Institutionen för fysik (GU)); S. Bose (-); P. Sodano (-)
Publicerad i:
Physical Review B, 93 ( 20 )
ISSN:
2469-9950
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
The emerging field of quantum thermodynamics is contributing important results and insights into archetypal many-body problems, including quantum phase transitions. Still, the question whether out-of-equilibrium quantities, such as fluctuations of work, exhibit critical scaling after a sudden quench in a closed system has remained elusive. Here, we take a novel approach to the problem by studying a quench across an impurity quantum critical point. By performing density matrix renormalization group computations on the two-impurity Kondo model, we are able to establish that the irreversible work produced in a quench exhibits finite-size scaling at quantum criticality. This scaling faithfully predicts the equilibrium critical exponents for the crossover length and the order parameter of the model, and, moreover, implies an exponent for the rescaled irreversible work. By connecting the irreversible work to the two-impurity spin correlation function, our findings can be tested experimentally.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik
Nyckelord:
2-impurity kondo problem, matrix renormalization-group, jarzynski, equality, critical-point, systems, model, Physics
Postens nummer:
240185
Posten skapad:
2016-08-12 13:10

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007