Spontaneuos and Parametric Processes in Warm Rubidium Vapours

Controllable ultrabroadband slow light in a warm rubidium vapor

We study ultrabroadband slow light in a warm rubidium vapor cell. By working between the D1 and D2 transitions, we find a several-nanometer window centered at 788:4 nm in which the group index is highly uniform and the absorption is small (<1%). We demonstrate that we can control the group delay by varying the temperature of the cell, and we observe a tunable fractional delay of 18 for pulses a...

Quantum memory in warm rubidium vapor with buffer gas.

The realization of quantum memory using warm atomic vapor cells is appealing because of their commercial availability and the perceived reduction in experimental complexity. In spite of the ambiguous results reported in the literature, we demonstrate that quantum memory can be implemented in a single cell with buffer gas using the geometry where the write and read beams are nearly copropagating...

High efficiency coherent optical memory with warm rubidium vapour

By harnessing aspects of quantum mechanics, communication and information processing could be radically transformed. Promising forms of quantum information technology include optical quantum cryptographic systems and computing using photons for quantum logic operations. As with current information processing systems, some form of memory will be required. Quantum repeaters, which are required fo...

Warm Rain Precipitation Processes

Specifying and Verifying Parametric Processes

A framework in which processes parametrized with other processes can be speciied, deened and veriied is introduced. Higher order process-parameters are allowed. The formalism resembles typed lambda calculus built on top of a process algebra, where speciications play the role of types. A proof system for deriving judgements \parametric process meets a speciication" is given.