Quantum Compiling with Qudits

Oftentimes, researchers are afforded the convenience of thinking about quantum computing operations in whatever form is most relevant for their work. For theorists, this is usually as abstract unitary operations, and for experimentalists, this is generally as sequences of gates native to their particular experimental architecture. Quantum compilers serve as the translator between these two representations.

Make your own clock states

Decoherence of quantum systems due to uncontrolled fluctuations of the environment presents fundamental obstacles in quantum science. `Clock' transitions which are insensitive to such fluctuations are used to improve coherence, however, they are not present in all systems or for arbitrary system parameters. In this talk I will discuss how to create a trio of synthetic clock transitions using continuous dynamical decoupling. In our spin-1 Bose-Einstein condensate, this reduces of sensitivity to magnetic field noise of up to four orders of magnitude.

Measurement of Quantum Scrambling with Trapped Ions

Trapped ion crystals are a promising technology for building large-scale quantum computers, which may be able to simulate inaccessible physical systems like black holes. Quantum scrambling occurs when local information disperses into quantum many-body correlations and describes an interpretation of the black hole information problem. Out-of-time-ordered correlation functions (OTOCs) have recently emerged as a way to directly measure quantum scrambling.