Detecting Kondo Entanglement by Electron Conductance
arXiv:1808.09043 · doi:10.1103/PhysRevLett.120.146801
Abstract
Quantum entanglement between an impurity spin and electrons nearby is a key property of the single-channel Kondo effects. We show that the entanglement can be detected by measuring electron conductance through a double quantum dot in an orbital Kondo regime. We derive a relation between the entanglement and the conductance, when the SU(2) spin symmetry of the regime is weakly broken. The relation reflects the universal form of many-body states near the Kondo fixed point. Using it, the spatial distribution of the entanglement, hence, the Kondo cloud, can be detected, with breaking the symmetry spatially nonuniformly by electrical means.
References in corpus (12)
- The numerical renormalization group method for quantum impurity systems
- Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
- Kondo effect in quantum dots
- Kondo screening cloud in a one dimensional wire: Numerical renormalization group study
- Friedel oscillations and the Kondo screening cloud
- Spin Correlations and Finite-Size Effects in the One-dimensional Kondo Box
- Impurity Entanglement Entropy and the Kondo Screening Cloud
- Transport through quantum dots in mesoscopic circuits
- Macroscopic Quantum Entanglement of a Kondo Cloud at Finite Temperature
- Quantitative Calculation of the Spatial Extension of the Kondo Cloud
- Impurity entanglement entropy in Kondo systems from conformal field theory
- Kondo temperature and screening extension in a double dot system
Cited by in corpus (14)
- Observation of the Kondo Screening Cloud of Micron Lengths
- Anyons in Multichannel Kondo Systems
- Universal Thermal Entanglement of Multichannel Kondo Effects
- Numerical renormalization group method for entanglement negativity at finite temperature
- Hierarchical entanglement shells of multichannel Kondo clouds
- Unveiling the Kondo cloud: unitary RG study of the Kondo model
- Engineering the Kondo impurity problem with alkaline-earth atom arrays
- Ensemble dependence of information-theoretic contributions to the entropy production
- Quantum entanglement and transport in non-equilibrium interacting double-dot setup: The curious role of degeneracy
- System-bath entanglement of noninteracting fermionic impurities: Equilibrium, transient, and steady-state regimes
- Quasiparticle mass enhancement as a measure of entanglement in the Kondo problem
- Two-channel charge-Kondo physics in graphene quantum dots
- Spectral properties of Co-decorated quasi 2-dimensional GaSe layer
- Fractional shot noise of an SU(N) Kondo system