Pairwise quantum correlations in four-level quantum dot systems
arXiv:2203.01078 · doi:10.1016/j.physleta.2021.127140
Abstract
In this paper we assume quantum dots can be assimilated to Fermi Hubbard sites when the Coulomb interaction between electrons is higher compared to their tunneling. The study of pairwise entanglement in a small size array of quantum dots allows to model each pair as a quadrit-quadrit system (4 4 mixed state) instead of the more common and simplistic approach of describing it in quantum information as a qubit-qubit system. We study the effect of Coulomb interaction and temperature on pairwise entanglement as well as on quantum coherence and total correlations. The crucial results of this study are that entanglement resists better the increase in temperature when the Coulomb interaction is stronger. Moreover, we successfully explain the behavior of these correlations in terms of the energy spectrum, namely the ground state degeneracy and the state energy difference.
References in corpus (25)
- Quantifying Coherence
- Spins in few-electron quantum dots
- Electron transport through double quantum dots
- Entanglement in a simple quantum phase transition
- Silicon Quantum Electronics
- Quantum entanglement in condensed matter systems
- Entanglement and quantum phase transition in the extended Hubbard model
- Local entanglement and quantum phase transition in the Hubbard model
- Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
- Concurrence of arbitrary dimensional bipartite quantum states
- Design and proof of concept for silicon-based quantum dot quantum bits
- Practical design and simulation of silicon-based quantum dot qubits
- Entanglement swapping with photons generated on-demand by a quantum dot
- Indistinguishability of elementary systems as resource for quantum information processing
- Measuring Multipartite Concurrence with a Single Factorizable Observable
- Quantum simulation of Fermi-Hubbard models in semiconductor quantum dot arrays
- Block-block entanglement and quantum phase transitions in one-dimensional extended Hubbard model
- Hubbard model description of silicon spin qubits: charge stability diagram and tunnel coupling in Si double quantum dots
- The Origin of Degeneracies and Crossings in the 1d Hubbard Model
- Thermal entanglement and correlated coherence in two coupled double quantum dots systems
- The Hubbard model as an approximation to the entanglement in nanostructures
- Quantum Correlations Dynamics In Two Coupled Semiconductor InAs Quantum Dots
- Thermal entanglement in a triple quantum dot system
- Entanglement in a three spin system controlled by electric and magnetic field
- Coulomb effects in artificial molecules