Quantum computing has garnered a lot of attention due to the belief that it would be able to solve certain kinds of problems which are intractable to classical computers. One of the leading candidate platforms for quantum computing is superconducting circuits. Within this platform, there are two main methods of storing quantum information: Josephson-junction based artificial atoms (for example, transmons), and harmonic oscillators. The large Hilbert space of the bosonic excitations of a harmonic oscillator allows for redundant storage of quantum information. Quantum error correction in a single mode using bosonic codes has been demonstrated beyond break-even. However, using more than a handful of devices requires re-designing the hardware. In this talk, I shall discuss ways to improve the scalability of harmonic oscillators without sacrificing their coherence times, and present recent results on hybrid resonators.
Thesis advisor: Prof. Rob Schoelkopf (rob.schoelkopf@yale.edu)
Committee: Prof. Michel Devoret, Prof. Hong Tang, Prof. Leonid Glazman