676 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad Nacional Autónoma de MéxicoMX100 papers
- Instituto de Astrofísica de CanariasES14 papers
- National Institute of Astrophysics, Optics and ElectronicsMX11 papers
- Instituto de Astrofísica de AndalucíaES10 papers
- Center for Astrophysics Harvard & SmithsonianUS9 papers
- Astronomical ObservatoryRS8 papers
- Ensenada Institute of TechnologyMX8 papers
- Ioffe InstituteRU8 papers
- Brera Astronomical ObservatoryIT7 papers
- Special Astrophysical ObservatoryRU7 papers
- Universidad Andrés BelloCL7 papers
- Universidad de La LagunaES7 papers
21 papers · 1 filter
Thermal Uhlmann phase in a locally driven two-spin system
J. Villavicencio, E. Cota, F. Rojas +3
We study the geometric Uhlmann phase of mixed states at finite temperature in a system of two coupled spin- particles driven by a magnetic field applied to one of the sp…
Uhlmann phase in composite systems with entanglement
J. Villavicencio, E. Cota, F. Rojas +2
We study the geometric Uhlmann phase of entangled mixed states in a composite system made of two coupled spin- particles with a magnetic field acting on one of them. Wit…
Transient quantum beats, Rabi-oscillations and delay-time of modulated matter-waves
Jorge Villavicencio, Alberto Hernández-Maldonado
Transient phenomena of phase modulated cut-off wavepackets are explored by deriving an exact general solution to Schrödinger's equation for finite range potentials involving arbitr…
Zitterbewegung and Klein-tunneling phenomena for transient quantum waves
Fernando Nieto-Guadarrama, Jorge Villavicencio
We explore the dynamics of relativistic quantum waves in a potential step by using an exact solution to the Klein-Gordon equation with a point source initial condition. We show tha…
Effect of the resonance spectra in the propagation of two decaying entangled particles
Gastón García-Calderón, Roberto Romo, Miguel Ángel Terán
An exact analytical solution of the decaying wave function of two identical noninteracting particles, which are entangled by spatial symmetry, is used to analyze the effect of the…
Nonexponential tunneling decay of a single ultracold atom
Gastón García-Calderón, Roberto Romo
By using an exact analytical approach to the time evolution of decay we investigate the tunneling decay of ultracold single atoms, to discuss the conditions for deviations of the e…
Hermitian and non-Hermitian formulations of the time evolution of quantum decay
Gastón García-Calderón, Alejandro Máttar, Jorge Villavicencio
This work discusses Hermitian and non-Hermitian formulations for the time evolution of quantum decay, that involve respectively, continuum wave functions and resonant states, to sh…
Full time nonexponential decay in double-barrier quantum structures
Gaston Garcia-Calderon, Jorge Villavicencio
We examine an analytical expression for the survival probability for the time evolution of quantum decay to discuss a regime where quantum decay is nonexponential at all times. We…
Quantum shutter approach to tunneling time scales with wave packets
Norifumi Yamada, Gastón García-Calderón, Jorge Villavicencio
The quantum shutter approach to tunneling time scales (G. Garc\'{ı}a-Calderón and A. Rubio, Phys. Rev. A \textbf{55}, 3361 (1997)), which uses a cutoff plane wave as the initial co…
Transient time-domain resonances and the time scale for tunneling
Gastón García-Calderón, Jorge Villavicencio
Transient {\it time-domain resonances} found recently in time-dependent solutions to Schrödinger's equation are used to investigate the issue of the tunneling time in rectangular p…
Tunneling dynamics in relativistic and nonrelativistic wave equations
F. Delgado, J. G. Muga, A. Ruschhaupt +2
We obtain the solution of a relativistic wave equation and compare it with the solution of the Schroedinger equation for a source with a sharp onset and excitation frequencies belo…
Equivalence between the real time Feynman histories and the quantum shutter approaches for the "passage time" in tunneling
Gaston Garcia-Calderon, Jorge Villavicencio, Norifumi Yamada
We show the equivalence of the functions and for the ``passage time'' in tunneling. The former, obtained within the framework of the real time Feynman h…
The role of the buildup oscillations on the speed of resonant tunneling diodes
Roberto Romo, Jorge Villavicencio
The fastest tunneling response in double barrier resonant structures is investigated by considering explicit analytic solutions of the time dependent Schrödinger equation. For cuto…
Quantum-wave evolution in a step potential barrier
Jorge Villavicencio, Roberto Romo, Sukey Sosa y Silva
By using an exact solution to the time-dependent Schrödinger equation with a point source initial condition, we investigate both the time and spatial dependence of quantum waves in…
Transient tunneling effects of resonance doublets in triple barrier systems
Roberto Romo, Jorge Villavicencio, Gaston Garcia-Calderon
Transient tunneling effects in triple barrier systems are investigated by considering a time-dependent solution to the Schrödinger equation with a cutoff wave initial condition. We…
Delay time and tunneling transient phenomena
Gaston Garcia-Calderon, Jorge Villavicencio
Analytic solutions to the time-dependent Schrödinger equation for cutoff wave initial conditions are used to investigate the time evolution of the transmitted probability density f…
Time scale of forerunners in quantum tunneling
G. Garcia-Calderon, Jorge Villavicencio, F. Delgado +1
The forerunners preceding the main tunneling signal of the wave created by a source with a sharp onset or by a quantum shutter, have been generally associated with over-the-barrier…
Dynamical analysis of the buildup process near resonance
Jorge Villavicencio, Roberto Romo
The time evolution of the buildup process inside a double-barrier system for off-resonance incidence energies is studied by considering the analytic solution of the time dependent…
Exact relativistic time evolution for a step potential barrier
Jorge Villavicencio
We derive an exact analytic solution to a Klein-Gordon equation for a step potential barrier with cutoff plane wave initial conditions, in order to explore wave evolution in a clas…
Early times in tunneling
Gaston Garcia-Calderon, Jorge Villavicencio
Exact analytical solutions of the time-dependent Schrödinger equation with the initial condition of an incident cutoff wave are used to investigate the traversal time for tunneling…
Dynamical description of the buildup process in resonant tunneling: Evidence of exponential and non-exponential contributions
Roberto Romo, Jorge Villavicencio
The buildup process of the probability density inside the quantum well of a double-barrier resonant structure is studied by considering the analytic solution of the time dependent…