Entropy, fidelity, and double orthogonality for resonance states in two-electron quantum dots

F. M. PONT; OMAR OSENDA; J. H. TOLOSA; PABLO SERRA

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

AMER PHYSICAL SOC

Lugar: New York; Año: 2010 vol. 88 p. 42518 - 425189

1050-2947

Resonance states of a two-electron quantum dots are studied using a variational expansion with both realbasis-set functions and complex scaling methods. The two-electron entanglement (linear entropy) is calculatedas a function of the electron repulsion at both sides of the critical value, where the ground (bound) state becomesa resonance (unbound) state. The linear entropy and fidelity and double orthogonality functions are comparedas methods for the determination of the real part of the energy of a resonance. The complex linear entropy of aresonance state is introduced using complex scaling formalism.