Quantum mechanics is at the heart of our technology and economy - the laser and the transistor are quantum devices - but its full potential is far from being realized. Recent technological advances in optics, nanoscience and engineering allow experimentalists to create artificial structures or put microscopic and mesoscopic systems under new manipulable conditions in which quantum phenomena play a fundamental role.

Quantum technologies exploit these effects with practical purposes. The objective of Quantum Science is to discover, study, and control quantum efects at a fundamental level. These are two sides of a virtuous circle: new technologies lead to the discovery and study of new phenomena that will lead to new technologies.

Our aim is  to control and understand quantum phenomena in a multidisciplinary intersection of  Quantum Information, Quantum optics and cold atoms, Quantum Control, Spintronics, Quantum metrology, Atom interferometry, Superconducting qubits and Circuit QED and Foundations of Quantum Mechanics.

QUINST is funded in part as a “Grupo Consolidado” from a Basque Government Grant (J. G. Muga is the current PI), and functions as a network of groups with their own funding, structure, and specific goals.  



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Juan Carlos Retamal (Univ. de Santiago de Chile) (Seminar)

When and where



Day: 2009/05/06

Place: Sala de Seminarios del Departamento de Física Teórica e Historia de la Ciencia
Time: 12h.
Title: Sudden death and sudden birth of entanglement
We consider entangled two photon mode states under the action of dissipation. We describe the process of entanglement transference to reservoir degrees of freedom and characterize the time where disentaglement takes place vs the time where birth of entanglement takes place. In addition we consider the evolution of a class of entangled coherent states of two quantized fields under dissipation. Under certain conditions the dynamics may be studied in a finite dimensional time dependent orthogonal basis. Asymptotic decays as well as finite time disentanglement can be found depending on the initial condition and phase space distances among the components of each mode.