SU(4) Kondo entanglement in double quantum dot devices
arXiv:1705.00750 · doi:10.1103/PhysRevB.96.075157
Abstract
We analyze, from a quantum information theory perspective, the possibility of realizing a SU(4) entangled Kondo regime in semiconductor double quantum dot devices. We focus our analysis on the ground state properties and consider the general experimental situation where the coupling parameters of the two quantum dots differ. We model each quantum dot with an Anderson type Hamiltonian including an interdot Coulomb repulsion and tunnel couplings for each quantum dot to independent fermionic baths. We find that the spin and pseudospin entanglements can be made equal, and the SU(4) symmetry recovered, if the gate voltages are chosen in such a way that the average charge occupancies of the two quantum dots are equal, and the double occupancy on the double quantum dot is suppressed. We present density matrix renormalization group numerical results for the spin and pseudospin entanglement entropies, and analytical results for a simplified model that captures the main physics of the problem.
arXiv comment9 pages, 7 figures, Phys. Rev. B
References in corpus (32)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- The density-matrix renormalization group
- Scaling of Entanglement close to a Quantum Phase Transitions
- Matrix Product States, Projected Entangled Pair States, and variational renormalization group methods for quantum spin systems
- Entanglement in a simple quantum phase transition
- Quantum entanglement in condensed matter systems
- DMRG and periodic boundary conditions: a quantum information perspective
- Revival of the Kondo effect
- Entanglement and quantum phase transition in the extended Hubbard model
- Local entanglement and quantum phase transition in the Hubbard model
- SU(4) Fermi Liquid State and Spin Filtering in a Double Quantum Dot System
- SU(4) Kondo Effect in Carbon Nanotubes
- Observation of the SU(4) Kondo state in a double quantum dot
- Negativity as the Entanglement Measure to Probe the Kondo Regime in the Spin-Chain Kondo Model
- SU(4) and SU(2) Kondo Effects in Carbon Nanotube Quantum Dots
- Entanglement probe of two-impurity Kondo physics in a spin chain
- An order parameter for impurity systems at quantum criticality
- Magnetic Field Probing of an SU(4) Kondo Resonance in a Single Atom Transistor
- Entanglement structure of the two-channel Kondo model
- Impurity Entanglement Entropy and the Kondo Screening Cloud
- Scaling of tripartite entanglement at impurity quantum phase transitions
- Interplay of Kondo effect and strong spin-orbit coupling in multi-hole ultraclean carbon nanotubes
- New Numerical Results Indicate a Half-Filling SU(4) Kondo State in Carbon Nanotubes
- Thermopower of an SU(4) Kondo resonance under an SU(2) symmetry-breaking field
- Unveiling the internal entanglement structure of the Kondo singlet
- Full electrostatic control over polarized currents through spin-orbital Kondo effect
- Conditions for observing emergent SU(4) symmetry in a double quantum dot
- Analysis of low energy response and possible emergent SU(4) Kondo state in a double quantum dot
- Restoring the SU(4) Kondo regime in a double quantum dot system
- Polarized currents and spatial separation of Kondo state: NRG study of spin-orbital effect in a double QD
- Splitting electronic spins with a Kondo double dot device
- Orbital caloritronic transport in strongly interacting quantum dots
Cited by in corpus (3)
- Quantum entanglement and transport in non-equilibrium interacting double-dot setup: The curious role of degeneracy
- Generalized Nonequilibrium Quantum Transport of Spin and Pseudospins: Entanglements and Topological Phases
- NOON state generation with phonons in acoustic wave resonators assisted by a nitrogen-vacancy-center ensemble