Speaker: Diego González Olivares
Affiliation: Instituto de Física Fundamental, CSIC
Date: Wednesday, 29 June 2016 at 13:00
Location: Seminar Room, Serrano 121 (CFMAC)
Boson sampling is a model of quantum computation that was proposed by S. Aaroson and A. Arkhipov as a restricted model for post-classical computation whose architecture should be experimentally achievable with current, state of the art technologies.
We have studied a system that consists of 2M matter qubits that interact through a boson sampling circuit, i.e., an M-port interferometer, embedded in two di erent architectures. We have proven that, under the conditions required to derive a master equation, the qubits evolve according to e ective bipartite XY spin Hamiltonians, with or without local and collective dissipation terms. This opens the door to the simulation of any bipartite spin or hard-core boson models and exploring dissipative phase transitions as the competition between coherent and incoherent exchange of excitations. We have also shown that, in the purely dissipative regime, this model has a large number of exact and approximate dark states, whose structure and decay rates can be estimated analytically. We argue that this system may be used for the adiabatic preparation of boson sampling states encoded in the matter qubits.