Tat Chee

Aug 29, 2024 | link.aps.org | Tat Chee |Xin Wang

Finding ways to transform a quantum state to another is fundamental to quantum information processing. In this paper, we apply the sparse matrix approach to the quantum state transformation problem. In particular, we present an approach for searching for unitary matrices for quantum state transformation by directly optimizing the objective problem using the alternating direction method of multipliers.

Aug 29, 2024 | academic.oup.com | Carnegie Observatories |Los Alamos |Tat Chee |Zhichao Carton

Dark matter is a necessary ingredient to the Standard Model of Cosmology. Yet, its particle nature remains mysterious. Self-interacting dark matter (SIDM) is an alternative theory to the standard cold collisionless dark matter (CDM) model. In addition to gravitational interactions, dark matter (DM) particles can also have sizable self-interactions that allow them to scatter off with each other.

Dec 23, 2023 | academic.oup.com | Tat Chee |Yan Zhou

Epigenetics explores heritable changes in gene expression independent of DNA sequence alterations (Dupont et al. 2009). Key epigenetic modifications such as DNA methylation, histone modification, promoter–enhancer interaction, and noncoding RNA regulation play crucial roles and can contribute to diseases (Allis and Jenuwein 2016, Chen et al. 2017).

Sep 12, 2023 | academic.oup.com | Tat Chee

The presence of a central baryonic potential can have a significant impact on the gravothermal evolution of self-interacting dark matter (SIDM) haloes. We extend a semi-analytical fluid model to incorporate the influence of a static baryonic potential and calibrate it using controlled N-body simulations. We construct benchmark scenarios with varying baryon concentrations and different SIDM models, including constant and velocity-dependent self-interacting cross-sections.

Jul 31, 2023 | e3s-conferences.org | Tat Chee |Zhenyu Wang

E3S Web of Conferences 406, 04042 (2023) Study of Residential Thermal Transfer Values (RTTV) and vertical daylight factors (VDF) for Heavily Obstructed Public Housing Flats and * Building Energy Research Group, Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China * Corresponding author: [email protected] Abstract Hong Kong, one of the most densely populated cities in the world, consumes more than a quarter of its total...