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Electromechanical Quantum Simulators by Francesco Tacchino

Dec 12, 2017, 3:00 PM-4:30 PM

202 Physics Bldg.

Host: Prof. Matt LaHaye / Contact: Yudaisy Salomón Sargentón, 315-443-5960

Quantum simulators are one of the most appealing applications of a quantum computer. In this talk, I will describe a recent theoretical proposal [1] of a universal, scalable, and integrated digital quantum simulator in which the quantum information processing is carried out by tunable nano-electromechanical qubits within a superconducting microwave circuit. Very high operationaldelity can e achieved in a minimal architecture where qubits are encoded in the anharmonic vibrational modes of mechanical nanoresonators, whose eective coupling is mediated by virtual uctuations of an intermediate superconducting art cial atom. The explicit digital quantum simulation of the spin S = 1 tunnelling Hamiltonian and of transverseeld Ising model will be described as paradigmatic examples, displaying very large theoreticaldelities with realistic model parameters. The talk is divided in three parts. In therst one, I will summarize the basic concepts about quantum simulators, describe existing and proposed platforms for quantum computing and present some simple examples. In the second part, I will discuss the properties of quantum electromechanichal devices and some of the most interesting recent achievements in theeld. Finally, the last part of the talk will be dedicated to an extensive description of the proposed quantum electromechanical simulator.


[1] F. Tacchino, A. Chiesa, M. D. LaHaye, S. Carretta and D. Gerace, Electromechanical Quantum Simulators, arXiv:1711.000511