Rescuing a Quantum Phase Transition with Quantum Noise
Journal Article
·
· Physical Review Letters
- Duke Univ., Durham, NC (United States); Duke University, Dept of Physics
- Federal Univ. of ABC, Santo Andre, SP (Brazil)
- Duke Univ., Durham, NC (United States)
In this work, we show that placing a quantum system in contact with an environment can enhance non-Fermi-liquid correlations, rather than destroy quantum effects, as is typical. The system consists of two quantum dots in series with two leads; the highly resistive leads couple charge flow through the dots to the electromagnetic environment, the source of quantum noise. While the charge transport inhibits a quantum phase transition, the quantum noise reduces charge transport and restores the transition. We find a non-Fermi-liquid intermediate fixed point for all strengths of the noise. For strong noise, it is similar to the intermediate fixed point of the two-impurity Kondo model.
- Research Organization:
- Duke Univ., Durham, NC (United States)
- Sponsoring Organization:
- São Paulo Research Foundation (FAPESP); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0005237
- OSTI ID:
- 1783706
- Alternate ID(s):
- OSTI ID: 1342450
OSTI ID: 1536476
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 118; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
Coulomb blockade
nanoscale
nanostructure
open quantum systems
quantum criticality
quantum dissipation
quantum dots
quantum phase transition
quantum transport
strongly correlated electrons
transport phenomena
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
Coulomb blockade
nanoscale
nanostructure
open quantum systems
quantum criticality
quantum dissipation
quantum dots
quantum phase transition
quantum transport
strongly correlated electrons
transport phenomena