Quantum Initiative: Quantum Lunch

The Quantum Lunch is regularly held on Thursdays in the Theoretical Division Conference Room, TA-3, Building 123, Room 121.

The organizing committee includes Malcolm Boshier (P-21), Lukasz Cincio (T-4), Diego Dalvit (T-4), Changhyun Ryu (P-21) , Nikolai Sinitsyn (T-4), Rolando Somma (T-4), Yigit Subasi (T-4), Christopher Ticknor (T-1), and Wojciech Zurek (T-4).

For more information, or to nominate a speaker, contact Yigit Subasi or Lukasz Cincio.

To add your name to the Quantum Lunch email list, contact Kacy Hopwood.

Thursday August 3, 2017
12:30 PM - 2:00 PM

Speaker: Mike Zwolak (National Institute of Standards and Technology)

Technical Host: Lukasz Cincio

TOPIC: An energy-resolved atomic scanning probe

Abstract
The scanning tunneling microscope is arguably the most versatile instrument for probing the local density of states of material surfaces, molecules, and devices. Despite its versatility, it has a limited range of accessible energies, whereas other spectroscopic techniques typically have a limited spatial resolution. Tunable atomic systems, though, can mimic, e.g., materials and electronics and probe them in ways not easily achievable by traditional techniques, especially for transport phenomena. Here, we fuse atomic and tunneling techniques to demonstrate a method that provides both spatial and energy resolution, as well as expands the accessible energy range to that prevalent in many-body systems. In this hybrid approach, the current supplies a simple, yet quantitative operational definition of a local density of states for both interacting and non-interacting systems as the rate at which particles can be siphoned from the system of interest by a narrow energy band of non-interacting states. Ultra-cold atomic lattices are a natural platform for implementing this concept to visualize the energy and spatial dependence of the atom density in interacting, inhomogeneous lattices, including ones with nontrivial topologies.