Events Daily

Thursday, October 5, 2023

Constraining cosmological models with the effective field theory of large-scale structures
Théo Simon, Laboratoire Univers et Particules de Montpellier (LUPM)
Event Type: Informal Astro Talk
Time: 12:30 PM - 1:15 PM
Location: 726 Broadway, 902, Lg Conf
Abstract: In this talk, I will present the paradigm of the effective field theory of large-scale structures (EFTofLSS) and how it can be used to constrain cosmological models. First, I will discuss the consistency of this theory and its predictive power, and then I will present the constraints of the EFTofLSS applied to BOSS and eBOSS data on the LCDM model. Finally, I will mention the constraints from this theory on early dark energy, a model that potentially resolves the Hubble tension, and on decaying cold dark matter, a model that possibly resolves the S8 tension.

Spin Qubits in Semiconductors for Scalable Quantum Computers
Daniel Loss, Universitat Basel
Event Type: Physics Dept Colloquium
Time: 4:00 PM - 5:30 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: Semiconductor spin qubits offer a unique opportunity for scalable quantum computation by leveraging classical transistor technology. This has triggered a worldwide effort to develop spin qubits, in particular, in Si and Ge based quantum dots, both for electrons and for holes. Due to strong spin orbit interaction, hole spin qubits benefit from ultrafast all-electrical qubit control and sweet spots to counteract charge and nuclear spin noise . In this talk I will present an overview of the state-of-the art in the field and focus, in particular, on recent developments on hole spin physics in Ge and Si nanowires, Si FinFETs, and Ge heterostructures.