Browsing by Subject "Effective potentials"
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Item Open Access Non-Boltzmann stationary distributions and non-equilibrium relations in active baths(Optical Society of America, 2017) Argun, A.; Moradi, A. R.; Pinçe, E.; Bağcı, Gökhan Barış; Imparato, A.; Volpe, GiovanniThe presence of active noise generated by motile bacteria results in the violation of Boltzmann distribution. Therefore, non-equilibrium relations become invalid active baths. Yet these relations can be recovered by introducing effective potentials.Item Open Access Study of junction and bias parameters in readout of phase qubits(2012) Zandi H.; Safaei, S.; Khorasani, S.; Fardmanesh, M.The exact numerical solution of the nonlinear Ginzburg-Landau equation for Josephson junctions is obtained, from which the precise nontrivial current density and effective potential of the Josephson junctions are found. Based on the resulting potential well, the tunneling probabilities of the associated bound states are computed which are in complete agreement with the reported experimental data. The effects of junction and bias parameters such as thickness of the insulating barrier, cross sectional area, bias current, and magnetic field are fully investigated using a successive perturbation approach. We define and compute figures of merit for achieving optimal operation of phase qubits and measurements of the corresponding states. Particularly, it is found that Josephson junctions with thicker barriers yield better performance in measurements of phase qubits. The variations of characteristic parameters such as life time of the states due to the above considered parameters are also studied and discussed to obtain the appropriate configuration setup.