"Entanglement in spin chains and quantum optical systems"
J. Ignacio Cirac
Max Planck Institute for Quantum Optics
Wednesday, May 5, 2004 -11 AM - 12:00 Noon in 375 LeConte Hall
Abstract
Much of the current effort in Quantum Information Theory is devoted to
the description and quantification of the entanglement contained in quantum states,
since this intriguing property of Quantum Mechanics is the basic resource of most
of the applications in this field, including quantum communication and computation.
Here I will introduce a new notion of entanglement which captures the idea of
how this property can be localized in small subsystems by performing measurement in
the rest of the system. I will also show how this notion allows to detect hidden orders
in spin systems at zero temperature, and how it behaves in quantum phase transitions.
Finally, I will show how the quantum properties of such systems can be studied
using a quantum simulator based on trapped ions.
