Simone Montangero, Workshop on: QUANTUM MEASUREMENTS AND OPERATIONS FOR CRIPTOGRAPHY AND INFORMATION PROCESSING

Workshop on QUANTUM MEASUREMENTS AND OPERATIONS FOR CRIPTOGRAPHY AND INFORMATION PROCESSING
Quantum Measurements and Operations for Criptography and Information Processing Dynamics of entanglement in a quantum computers with imperfections
aula - Lunedì 16 Maggio, ore 16.00
	SIMONE MONTANGERO, Scuola Normale Superiore di Pisa
>VITAE: Simone Montangero, studied at Pisa University, and obtained his Ph.D at Milan University in 2003 (“Quantum computing of complex dynamics”). He is post-doc at Scuola Normale Superiore since 2002 and works on quantum information and quantum chaos.
Abstract
	We study the dynamics of the entanglement in a qubit lattice in the presence of static imperfections. We consider different initial states (maximally pairwise entangled state, separable state, W state...) and we characterize the entanglement via the concurrence and the generalized entanglement with local and bilocal observables. We show that in both cases there is a transition from a perturbative region, where the entanglement is stable against imperfections, to the Fermi Golden Rule regime (ergodic regime), where the entanglement follows an exponential (gaussian) decay. This behavior is connected to the local density of states of the system.