Innovatives Supercomputing in Deutschland
inSiDE • Vol. 11 No. 1 • Spring 2013
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International Workshop on Cooperative Quantum Dynamics and Its Control (CQDC2012)

The "International Workshop on Cooperative Quantum Dynamics and Its Control (CQDC2012)" took place from 29 to 31 October 2012 at the rotunda of the Jülich Supercomputing Centre. The goal of the workshop was to discuss the possibility of essentially new quantum phenomena, and to discuss the observations and/or operations that would be required for their realization, detection, and understanding. About 40 researchers from Germany, France, Switzerland, the Netherlands, Canada, the United States and Japan participated in the workshop. Recent developments in quantum annealing, open quantum systems, quantum computer hardware, quantum dynamics of spin systems, equilibration and thermalization of quantum systems, decoherence, entanglement and related topics were highlighted in talks and posters. Quantum dynamics and novel quantum states in systems of many particles or spins, many of which have been beyond the reach of experimental realization, are now getting more and more realistic due to recent advancements in experimental techniques, such as the synthesis of molecular magnets, nano-engineering of quantum dots, time-resolved measurements with ultra-short pulses, and optical lattices of cold atoms. In particular, many attempts have been made for characterizing the wave function from the viewpoint of entanglement, which is often accomplished by the aid of supercomputers through the method of direct numerical solution of the evolution equation and/or through quantum Monte Carlo methods. In addition, new numerical methods, such as the tensor-network variational approximation, are making many previously hard problems now tractable.

The exploitation of quantum effects, requiring coherent control of dissipative dynamics and entanglement control, is expected to have profound implications for future emerging information technologies. Managing and designing complex quantum systems with specified behaviour for quantum information processing requires a deep understanding of the cooperative behaviour of their components. Unraveling this behaviour necessitates an intensive collaboration between theoreticians and experimenters. The workshop successfully presented an overview of the current research on various topics very closely and less closely related to quantum information processing.

• Kristel Michielsen
Jülich Supercomputing Centre

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