*Quantum Coherence, Noise and Decoherence in Nanostructures *Max-Planck Institute *"*The modern field of nanoelectronics has brought about novel physical phenomena and created new challenges for their interpretation within quantum theory. Among the most fundamental concepts are quantum coherence and interference effects. An improved understanding of these phenomena is needed both from a fundamental point of view as well as for a variety of potential applications – ranging from highly sensitive detectors to quantum information devices and single-electron logic circuits operating at room temperature. The goal of this

meeting is to bring together leading scientists from different subfields of condensed matter physics in order to advance the understanding of decoherence in nanostructures.

*"**Constructive Role of Noise in Complex Systems *Max-Planck Institute *"*Noise is inevitably present in any dissipative systems, and all living organisms operate in the noisy environment. Understanding the role of noise is crucial both in fundamental research in nonlinear physics, and in many applications in engineering, biology and medicine. Recent developments in statistical physics and nonlinear dynamics have shed light on a new, sometimes counterintuitive role which noise plays in nonlinear systems: in a wide range of systems, random forces may bring a system to a more ordered state. This

meeting will focus on recent developments in the field of noise and fluctuations in complex nonlinear systems, as well as on applications of new noise-mediated phenomena and theoretical methodologies in experimental physics, biological physics, neuroscience and medicine.

*"**Macroscopic Quantum Coherence and Computing *MQC² Workshop *"*The aim of the

workshop is to report on the recent theoretical and experimental results on the macroscopic quantum coherence of mesoscopic systems, as well as on solid state realization of qubits and quantum gates. Particular attention will be given to coherence effects in Josephson devices. Other physical systems, including quantum dots, optical, atomic, and molecular devices, exhibiting macroscopic quantum coherence, will also be discussed.

*"**Quantum Communications in Telecom Networks *IEEE *"*Quantum Cryptography, which carries a promise of fundamentally secure communications, has reached a point of relative maturity and first commercial offerings. Its broad deployment, however, is impeded by many technical challenges. This

conference will bring together researchers from universities, industry and government labs, commercial QC system manufacturers, service providers, and funding agencies to discuss the novel physics of single-photon sources, interactions between photonic and material qubits, distant entanglement, single photon detection, fundamental physical constraints on the performance of QC links and networks, and resulting trade-offs among key rate, distance and cryptographic security.

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