Superconducting coplanar waveguide (CPW) microwave resonators are the best components for reading and changing the state of artificial atoms in quantum circuits due to their excellent coupling to quantum systems. This coupling forms the basis of the developing circuit quantum electrodynamic architecture. In quantum processors, oscillators are used to store and transmit quantum information using microwave-frequency wave packets. However, the presence of amorphous thin-film defects can result in an irrevocable loss of coherent information with uncontrolled degrees of freedom. Although there has been extensive research into techniques to reduce the coherent loss of such devices, the precise structure of amorphous dielectric layers on surfaces and interfaces and their associated loss mechanism are being actively studied. In particular, planar superconducting resonators are very sensitive to defects on their surfaces, such as two-level systems in oxidized metals and nonequilibrium quasiparticles, making these devices suitable probes for the different loss mechanisms. In this seminar, we present the design, fabrication, and characterization of CPW resonators with surface treatments using self-assembled monolayers (SAMs), which mitigate the growth of oxides in superconducting circuits.

This seminar explores a diverse array of topics at the intersection of physics, computing, and engineering, shedding light on the intricacies of various theories and technologies. The journey begins with an examination of the Classical, Semi-Classical, and Quantum Theories of Light, delving into the fundamental principles that underlie our understanding of this phenomenon. Moving into the realm of computation, we embark on a journey of discovery through Comparisons Between Digital, Quantum, and Analog Computers, offering insights into the unique capabilities and limitations of each approach. As we delve deeper into the quantum realm, the seminar presents insights into Deriving the Hamiltonian of Superconducting Circuits and the Hamiltonian of a Qubit, pivotal components of quantum computing systems. Lastly, we venture into the practical realm of Design and Simulation of a Resonator, providing a glimpse into the creative processes and technical considerations essential for the development of cutting-edge resonator technology. Through this comprehensive exploration, participants will gain a multifaceted understanding of these key topics, from the theoretical foundations to their practical applications, in the ever-evolving landscape of science and technology.

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All faculty, researchers and students are invited to attend.