The Power of Parametric Effects in Engineered Quantum Systems | Seminar Series with Anja Metelmann

Speaker: Anja Metelmann
Host: Zlatko Minev, Ph.D.

Title: The Power of Parametric Effects in Engineered Quantum Systems

Abstract: Parametric couplings offers the exciting possibility to manipulate and control interactions between engineered quantum systems. Such systems are artificial mesoscopic systems whose dynamics are governed by the laws of quantum mechanics. Prominent examples of these mesoscopic systems are ultracold trapped atoms and ions, superconducting circuits and electro/optomechanical systems. Parametric modulation allows us to bring such engineered quantum systems of different energy scales into communication with each other, and provides us with the possibility to engineer coherent and dissipative processes among them. Dissipative processes are here rather special, as they are indirect processes mediated via a damped auxiliary system. In so-called dissipation engineering protocols one designs an environment in favor of a desired outcome. This includes the fascinating aspect of turning dissipation, which in general limits the performance of an experiment, into an advantageous tool. Combining such engineered dissipative processes with coherent dynamics allows for new effects to emerge. For example, we found that any factorisable (coherent) Hamiltonian interaction can be rendered nonreciprocal if balanced with the corresponding dissipative interaction. This powerful concept can be exploited to engineer nonreciprocal devices for quantum information processing, computation and communication protocols, e.g., to achieve control over the direction of propagation of photonic signals. In this talk I will introduce the basic concept and show how one can engineer reciprocal and nonreciprocal parametric amplifiers with improved characteristics over conventional setups.

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The Quantum Computing Seminar Series is a deep dive into various academic and research topics within the quantum community. It will feature community members and leaders every Friday, 12 PM EDT.

[KaliFissure]

So....i was looking over the Friedman equation the other day and noticed that it was constructed using a perfect fluid for space. But space is not a perfect fluid. It is almost infinitely compressible and out its viscosity changes as well this could account for the more visible manifestation of low density flow and low viscosity in dense regions would promote turbulence