Sandbo Chang
Meenu Kumari
Erickson Tjoa
Join us for our ongoing writing series on clarity in scientific writing. During this session, we will cover theory and practical examples related to active vs. passive voice, verb tense in scientific writing, parallel structure and more.
The discovery of quantum spin Hall effect engendered a new chapter of topological materials research in condensed matter physics and materials science. In this talk, I will introduce some of our recent theoretical works about the topological phases in 2D and 3D transition metal chalcogenides. We predict monolayer MX2 (M=Mo, W; X=S, Se, Te) of 1T’ structure could realize quantum spin Hall insulator.
Maria Kieferova
A metallic wire may seem to be the dullest conductor one can think of. With two experiments we will show that it may yet provide surprises ! First we consider how fast its noise, i.e. the variance of current fluctuations it generates, can respond to an ac excitation. We show that by answering this question one can extract the time constants of energy relaxation in the wire.
Sandbo Chang
Designing control pulses to generate desired unitary evolution subjugated to experimental constraints (e.g., decoherence time, bandwidth) is a common task for quantum platforms, these type of problems are often addressed in the context of quantum optimal control. Parallel Automatic Differentiation Quantum Optimal Control (PADQOC) is an open-source, Python based general quantum optimal control solver built on top of Tensorflow 2. It is designed to be fast, extensible and useful for controlling general quantum systems.
It is possible to engineer the properties of photons in an optical medium to have an effective mass and repulsive interactions so that they act like a gas of atoms. These "renormalized photons" are called polaritons. In the past decade, several experiments have demonstrated many of the canonical effects of Bose-Einstein condensation and superfluidity of polaritons.