Solid control

Seb J. Savory

We demonstrate in a solid state quantum gate based on the electronic excitation of a control atom that it is possible to disentangle the control electron, in the presence of an arbitrary magnetic field and exchange interaction. This will allow multiple gates on a single substrate, providing the basis for a solid state quantum computer.

Mike Wofsey

Xu Xiao-Juan

We reviewed the research of controllable group velocity based on coherent population oscillation in solid media at a room temperature.The phenomenon of spectral hole burning and the latest developments of the application in solid media were described.We emphatically discussed the physical principle and experiments of controllable group velocity in optical fibers.The significance of such research for science and applications were discussed.

J. Stajic

Antonio D’Arrigo, Elisabetta Paladino, G. Falci

Solid-state implementations of quantum bits are very promising for quantum computation, because of their potential scalability and integrability. On the other side solid state noise represents a serious limitation towards the target of solid state quantum computation. We illustrate various possibilities to apply quantum control techniques to solid state qubits. We focus on open loop quantum control, and show that a simple closed loop protocol can greatly improve the coherence time of single qubit gates.