| Tuesday, February 12, 2019 |
| Harnessing Mesoscopic Mechanical Systems for New Quantum Technologies | |
| Sungkun Hong, University of Vienna | |
| Event Type: CQP Faculty Search | |
| Time: 9:30 AM - 10:30 AM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: Quantum optomechanics is an emerging field in quantum science that aims to control quantum motions of mechanical objects using light-matter interactions. In recent years, the researchers started gaining quantum control over several mesoscopic mechanical systems. This advancement opens exciting possibilities for developing new quantum technologies and for testing quantum physics beyond the microscopic world. In this talk, I will describe two of my works on experimental quantum optomechanics. I will present our progress in utilizing on-chip optomechanical devices as a new resource for quantum information processing. By combining pulsed optical controls and single photon detection, we created quantum states of a silicon micromechanical resonator at a single phonon level. Based on this method, we generated the remote entanglement between two mechanical modes, paving the way for mechanics-based optical quantum memories and networks. I will also introduce a new optomechanical system that consists of an optically levitated nanoparticle and microfabricated photonic crystal cavities. This hybrid system will exhibit an exceptional combination of mechanical quality, flexibility, and controllability, allowing for a new level of quantum control over the particle’s motion. I will discuss the current status of the experiment and plans on further developing the system for novel quantum sensing applications. | |
| Modjaz Group Mtg | |
| Event Type: Modjaz Group Mtg | |
| Time: 11:00 AM - 12:30 PM | |
| Location: 726 Broadway, 901, Sm Conf | |
| A Predictive Theory of Star Formation and Turbulence Driving Across Cosmic Time | |
| Blakesley Burkhardt, Flatiron-CCA and Rutgers | |
| Event Type: Astro Seminar | |
| Time: 2:00 PM - 3:15 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: Our current view of the interstellar medium (ISM) is as a multiphase environment where magnetohydrodynamic (MHD) turbulence affects many key processes that govern the evolution of galactic disks include star formation. In this talk, I shall present two new analytic models connecting turbulence, star formation, feedback, and disk instability. I will show that the turbulence in discs can be powered primarily by star formation feedback, radial transport, or a combination of the two. From scales of GMCS, I will demonstrate how the star formation efficiency can be analytically calculated from our understanding of how turbulence, gravity, and stellar feedback induce density fluctuations in the ISM via a probability distribution function analysis. This analytic calculation predicts star formation rates and star formation efficiency from pc size scales (GMCs) to kpc size scales in galaxies. | |