Entanglement in resonances of two electron quantum dots

FEDERICO M. PONT, OMAR OSENDA, PABLO SERRA

International Center for Condensed Matter Physics, Brasilia, Brasil

Workshop; Workshop on Quantum Nonstationary Systems; 2009

International Center for Condensed Matter Physics

Bound and resonance states of a two-electron quantum dot are studied using a variational expansion with real basis-set functions. The two-electron entanglement (von Neumann entropy) is calculated as a function of the quantum-dot size at both sides of the critical size, where the ground (bound) state becomes a resonance (unbound) state. The use of von Neumann entropy is proposed as a method for the determination of the energy of a resonance