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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


Modelling epithelial cell sheets as active matter by Silke Henkes

Dec 15, 2017, 11:00 AM-12:00 PM

Rooms 202/204

Contact: David Yllanes, | Host: M. Cristina Marchetti,

Epithelial cell sheets are an important group of tissues that line the gut, the lungs, and cover the eye. Related tissues also form the germ layers during and after gastrulation during embryo development. Understanding their mechanics and dynamics is therefore paramount.I will give an overview of two recent approaches: First, I will discuss the results that can be obtained using extremely simple, particle based models of epithelial cell sheets. This includes the result that any amount of division fluidised a tissue at long time scales, and the existence of a universal velocity correlation function with long-range correlations. Second, SAMoS is a toolbox for active vertex model simulations, which includes the self-propelled Voronoi model, cell division and apoptosis, cell sheet boundaries, and different types of alignment. I will showcase its capabilities, but also the limitations of the approach.