Event Time: Monday, February 24, 2020 | 11:00 am - 12:30 pm
Event Location:
Hennings 318
Add to Calendar 2020-02-24T11:00:00 2020-02-24T12:30:00 Exploring Quantum Materials with Atomic Qubit Sensor Event Information: We are witnessing a revolution in which quantum phenomena are being harnessed for next-generation technology. A central challenge in this effort is to gain detailed insights in the behaviors of electrons and spins in quantum materials. In this context, quantum sensing technology realized with nitrogen vacancy (NV) center in diamond has emerged as a powerful probe of advanced materials and devices. Due to its ability to sense magnetic field with high spatial resolution over wide temperature and dynamic range, NV sensors enable the exploration of condensed matter phenomena in parameter space inaccessible to existing probes. In this talk, he will discuss our application of NV quantum sensing technology to study correlated electronic and spin phenomena. We have directly imaged, for the first time, the viscous Poiseuille flow of the Dirac fluid in neutral graphene, a finding that holds implication for other strongly correlated electrons such as those in high-Tc superconductors. Enabled by the NV platform, we have developed new capabilities for probing coherent spin-waves, which can be applied to study novel magnetic materials and spintronic devices, and a tool for charactering low-dimensional high-Tc cuprates without electrical contacts. Looking forward, he will highlight opportunities for advancing the frontiers of quantum materials and quantum technology enabled by NVs and other solid-state atomic qubits.   Event Location: Hennings 318
Event Time: Monday, March 9, 2020 | 11:00 am - 12:30 pm
Event Location:
Henn 318
Add to Calendar 2020-03-09T11:00:00 2020-03-09T12:30:00 Optical photon generation from a superconducting qubit Event Information: The ability to store, transfer, and process quantum information promises to transform how we calculate, communicate, and measure. The realization of large-scale quantum systems that can achieve these tasks is an outstanding challenge and an exciting frontier in modern physics. In the past two decades, superconducting circuits based on Josephson junctions emerged as a promising platform for processing quantum information. However, these systems operate at low temperatures and microwave frequencies, and require a coherent interface with optical photons to transfer quantum information across long distances. In this talk, he will present our recent experiments demonstrating quantum transduction of a superconducting qubit excitation to an optical photon. He will describe how we use mesoscopic mechanical oscillators in their quantum ground states to convert single photons from microwave frequencies to the optical domain. He will conclude by discussing the prospects of this approach for realizing future quantum networks based on superconducting quantum processors and mechanical quantum memories. Event Location: Henn 318