Study of RbCl quantum pseudo-dot qubits using Shannon and Laplace entropies

Abstract

In this work, an electron was considered which is coupled to the LO-phonon in RbCl quantum pseudo-dot. The Pekar variational method was used to calculate the eigenenergies and eigenfunctions of the ground and the first-excited states of the system. Two different entropies were considered, the Shannon and Laplace, to study decoherence of RbCl pseudodot qubit for different parameters. According to the obtained results, it is found that the entropy has the oscillatory periodic evolution as a function of the time due to the form of the confinement potential. It is also found that the entropies oscillate under a sinusoidal envelope with increasing the confinement parameters.