Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Three-electron bonding and entanglement in single and molecular quantum dots

Yuesong Li, Constantine Yannouleas, Uzi Landman

Published Mar 6, 2007• 0 citations
OpenAlex

Related papers

Entanglement dynamics of molecular exciton states in coupled quantum dots

Cameron V. Jennings, Michael Scheibner

We theoretically model the electronic dynamics of a coupled quantum dot pair in a static electric field. We then investigate the possibility of polarization-entangled photon emission from the radiative cascade of the molecular biexciton state. Through numerical simulations, we analyze the dependence of entanglement fidelity on temperature and electric field, as well as tunnel coupling. We establish a regime of direct-indirect exciton detunings for which coupled quantum dots are superior to single dots for entangled photon generation, yielding near-unit fidelity over a larger range of exchange splittings.

arXiv:1508.01298•Physical review. B./Physical review. B•Mar 17, 2016•8 citations

Entanglement in a Quantum-Dot Molecule

Science•Jan 19, 2001•0 citations

Non-empty quantum dot as a spin-entangler

Chih‐Lung Chou

We consider a three-port single-level quantum dot system with one input and two output leads. Instead of considering an empty dot, we study the situations that two input electrons co-tunnel through the quantum dot occupied by one or two dot electrons. We show that electron entanglement can be generated via the co-tunneling processes when the dot is occupied by two electrons, yielding non-local spin-singlet states at the output leads. When the dot is occupied by a single electron, we show that by carefully selecting model parameters non-local spin-triplet electrons can also be obtained at the output leads if the final dot electron has the same spin as that of the initial dot electron.

arXiv:quant-ph/0212131•Quantum Information and Computation•Jul 1, 2003•0 citations

Excitonic entanglement of protected states in quantum dot molecules

Halyne Silva Borges, L. Sanz, Augusto M. Alcalde

arXiv:1509.09256•Physics Letters A•Jul 17, 2016•6 citations

Quantum Entanglement and Reactivity of the Water Molecule

Sidra Azam, Tauqeer Ahmad, S. M. Zangi

Entanglement is a quantum mechanical correlation that effects the chemical reactivity of a molecule. In this study, we vary the bond length and bond angle of the water molecule in order to see how changes in its shape affect entanglement and reactivity. Entanglement is measured with three quantifiers of entanglement that are Von Neumann Entropy, Negativity and Concurrence. The results indicate that at compressed geometry, entanglement is higher due to high electron sharing and a reactive state. At near equilibrium, entanglement is moderate and the structure is stable. When the bond is stretched, entanglement is least because of electron localization and low reactivity. Each metric highlights a unique aspect of electron behavior. Entropy is the measure of total correlation, negativity is the early bond and concurrence is the pair electrons relation. It has been found that quantum entanglement can effectively describe chemical bonding and predict molecular reactivity beyond traditional energy-based approaches.

•Nov 25, 2025•0 citations

Entangled exciton states in quantum dot molecules

M. Bayer, G. Ortner, A. V. Larionov +7 more

Physica E Low-dimensional Systems and Nanostructures•Jan 1, 2002•10 citations
We theoretically model the electronic dynamics of a coupled quantum dot pair in a static electric field. We then investigate the possibility of polarization-entangled photon emission from the radiative cascade of the molecular biexciton state. Through numerical simulations, we analyze the dependence of entanglement fidelity on temperature and electric field, as well as tunnel coupling. We establish a regime of direct-indirect exciton detunings for which coupled quantum dots are superior to single dots for entangled photon generation, yielding near-unit fidelity over a larger range of exchange splittings.
We consider a three-port single-level quantum dot system with one input and two output leads. Instead of considering an empty dot, we study the situations that two input electrons co-tunnel through the quantum dot occupied by one or two dot electrons. We show that electron entanglement can be generated via the co-tunneling processes when the dot is occupied by two electrons, yielding non-local spin-singlet states at the output leads. When the dot is occupied by a single electron, we show that by carefully selecting model parameters non-local spin-triplet electrons can also be obtained at the output leads if the final dot electron has the same spin as that of the initial dot electron.
Entanglement is a quantum mechanical correlation that effects the chemical reactivity of a molecule. In this study, we vary the bond length and bond angle of the water molecule in order to see how changes in its shape affect entanglement and reactivity. Entanglement is measured with three quantifiers of entanglement that are Von Neumann Entropy, Negativity and Concurrence. The results indicate that at compressed geometry, entanglement is higher due to high electron sharing and a reactive state. At near equilibrium, entanglement is moderate and the structure is stable. When the bond is stretched, entanglement is least because of electron localization and low reactivity. Each metric highlights a unique aspect of electron behavior. Entropy is the measure of total correlation, negativity is the early bond and concurrence is the pair electrons relation. It has been found that quantum entanglement can effectively describe chemical bonding and predict molecular reactivity beyond traditional energy-based approaches.