Talk @UFF, Gabriel Aguilar (UFRJ), Friday 10/10, 11 AM

Next Friday, October 10th, at 11 AM we’ll have our next talk at the Quantum Optics and Quantum Information group at UFF. This time Gabriel Aguilar will describe the latest experiments that simulate quantum systems with linear optics. All are welcome! For more details, see below.When: Friday 10/10/2014, room A5-01, 11 am.

Speaker: Gabriel Aguilar (UFRJ)

Title: Linear-Optical Simulation of the Cooling of a Cluster-State Hamiltonian System

Abstract: A measurement-based quantum computer could consist of a local-gapped Hamiltonian system, whose thermal states {at su ciently low temperature{ are universal resources for the computation.
Initialization of the computer would correspond to cooling the system. We perform an experimental quantum simulation of such cooling process with entangled photons. We prepare three-qubit thermal
cluster states exploiting the equivalence between local dephasing and thermalisation for these states. This allows us to tune the system temperature by changing the dephasing strength. We monitor
the entanglement as the system cools down and observe the transitions from separability to bound entanglement, and then to free entanglement. We also analyse the performance of the system for
measurement-based single-qubit state preparation. These studies constitute a basic characterisation
of experimental cluster-state computation under imperfect conditions.

Phys. Rev. Lett. 112, 160501 (2014)
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.160501

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