255 citations · 1.1k across the 23 of their papers we have counts for
23 papers
Directionality and quantum backfire in continuous-time quantum walks from delocalized states: Exact results
Jefferson J. Ximenes, Marcelo A. Pires, José M. Villas-Bôas
We derive analytical results for continuous-time quantum walks from a new class of initial states with tunable delocalization. The dynamics are governed by a Hamiltonian with compl…
Enhanced spreading in continuous-time quantum walks using aperiodic temporal modulation of defects
José J. Ximenes, Marcelo A. Pires, José M. Villas-Bôas
Parrondo's paradox, where the alternation of two losing strategies can produce a winning outcome, has recently been demonstrated in continuous-time quantum walks (CTQWs) through pe…
Parrondo's effect in continuous-time quantum walks
J. J. Ximenes, M. A. Pires, J. M. Villas-Boas
We present the first manifestation of a Parrondo's effect in a continuous-time quantum walk (CTQW). In our protocol we consider a CTQW in the presence of time-dependent transition…
Dark Exciton Giant Rabi Oscillations with no External Magnetic Field
Vladimir Vargas-Calderón, Herbert Vinck-Posada, J. M. Villas-Boas
Multi-phonon physics is an emerging field that serves as a test bed for fundamental quantum physics and several applications in metrology, on-chip communication, among others. Quan…
Enhanced solar photocurrent using a quantum dot molecule
J. Lira, J. M. Villas-Boas, L. Sanz +1
In this paper we make a detailed study of the role of coherent tunneling, on the photocurrent and power delivered by a quantum dot molecule (QDM) in the presence of solar light. We…
Pure dephasing vs. Phonon mediated off-resonant coupling in a quantum-dot-cavity system
Santiago Echeverri-Arteaga, Herbert Vinck-Posada, José M. Villas-Bôas +1
Pure dephasing is widely used in the literature to explain experimental observations on quantum dots in cavities. In many cases, its use is not enough and extra terms need to be "f…