Universal Thermal Entanglement of Multichannel Kondo Effects

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 34
  • Download : 1
Quantum entanglement between an impurity and its environment is expected to be central in quantum impurity problems. We develop a method to compute the entanglement in spin-1/2 impurity problems, based on the entanglement negativity and the boundary conformal field theory (BCFT). Using the method, we study the thermal decay of the entanglement in the multichannel Kondo effects. At zero temperature, the entanglement has the maximal value independent of the number of the screening channels. At low temperature, the entanglement exhibits a power-law thermal decay. The power-law exponent equals two times of the scaling dimension of the BCFT boundary operator describing the impurity spin, and it is attributed to the energy-dependent scaling behavior of the entanglement in energy eigenstates. These agree with numerical renormalization group results, unveiling quantum coherence inside the Kondo screening length.
Publisher
AMER PHYSICAL SOC
Issue Date
2021-11
Language
English
Citation

PHYSICAL REVIEW LETTERS, v.127, no.22, pp.226801

ISSN
0031-9007
DOI
10.1103/physrevlett.127.226801
URI
http://hdl.handle.net/10203/289510
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
122453.pdf(456.12 kB)Download

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0