Light–matter quantum interface with continuous pump and probe

Dye laser with pump and quantum noise.

Antonio J. R. Madureira, 1,2 Peter Jung, 3 and Peter Hänggi 1 Institut für Physik, Universität Augsburg, Memmingerstrasse 6, D-86135 Augsburg, Germany Departamento de Matemática Aplicada, Universidade Estadual de Campinas, Caixa Postal 6065, 13081-970 Campinas, Brazil Department of Physics and Center of Complex Systems Research, Beckman Institute, University of Illinois at Urbana–Champaign, Urb...

Quantum dynamics of the Hubbard-Holstein model in equilibrium and nonequilibrium: application to pump-probe phenomena.

The spectral response and physical features of the 2D Hubbard-Holstein model are calculated both in equilibrium at zero and low chemical dopings, and after an ultrashort powerful light pulse, in undoped systems. At equilibrium and at strong charge-lattice couplings, the optical conductivity reveals a three-peak structure in agreement with experimental observations. After an ultrashort pulse and...

Femtosecond pump-probe studies of carrier transport and gain dynamics in quantum cascade lasers

Electrical pump-and-probe study of spin singlet-triplet relaxation in a quantum dot.

Spin relaxation from a triplet excited state to a singlet ground state in a semiconductor quantum dot is studied by employing an electrical pump-and-probe method. Spin relaxation occurs via co-tunneling when the tunneling rate is relatively large, confirmed by a characteristic square dependence of the relaxation rate on the tunneling rate. When co-tunneling is suppressed by reducing the tunneli...

Single-molecule pump-probe detection resolves ultrafast pathways in individual and coupled quantum systems.

We report the first experimental study of individual molecules with femtosecond time resolution using a novel ultrafast single-molecule pump-probe method. A wide range of relaxation times from below 100 up to 400 fs is found, revealing energy redistribution over different vibrational modes and phonon coupling to the nanoenvironment. Addressing quantum-coupled molecules we find longer decay time...