JQI Seminar

The main goal of quantum metrology is to leverage quantum mechanical objects such as atoms and molecules to improve sensing in any one of various aspects including sensitivity, speed, spatio-temporal resolution, and economic cost. A paradigmatic example is the use of entangled quantum particles to improve upon the standard quantum limit and achieve an improved sensitivity only limited by the Heisenberg uncertainty principle.

New techniques and resources in ultracold atomic physics have continually deepened its impact on science.  I will discuss two experimental developments that, hopefully, exemplify this trend.  First, I will share how my research group is using the versatile tool of atom-tweezer arrays to study collective atom-light coupling and symmetry-breaking in the mesoscopic regime.  Specifically, we show how, akin to the response of metamaterials, the precise control over the positions of atoms affects their collective coupling to an optical cavity.  This collective coupling t

Superconducting circuits provide a versatile platform for investigating many-body physics in synthetic quantum matter. Achieving scalable quantum simulation with these devices requires new methods for control and measurement. In this talk, I will present our recent experiments to control and probe quantum dynamics using both coherent and driven-dissipative techniques. First, I’ll discuss a set of transport experiments, where we develop an in-situ measurement of particle current and current statistics.

The optical frequency comb is one of the most significant advances in laser physics since the
development of the laser itself. It has made routine the counting and synthesis of the oscillations
of light on the femtosecond time scale, and it is an essential component of all present and future
optical clocks and time-transfer systems. It further enables the most accurate measurement of any
fundamental physical quantity—that of the quantized energy states of atoms and ions with 18

Speaker #1:  Alexander Schuckert

Tittle:  Fault-tolerant fermionic quantum computation with fermionic atoms

Van der Waals heterostructures composed of atomically thin semiconductors have recently
emerged as a platform for studying strongly interacting electronic and excitonic systems. In this
talk, I will discuss a few ongoing experiments aimed at probing and controlling their excitonic
phases. One focus is the exploration of exciton condensates, where we realize long-lived
excitons with large binding energies and low disorder—critical factors for realizing high-
temperature condensates. Furthermore, I will highlight how exciton-carrier interactions can

Controlling the functional properties of quantum materials with light has emerged as a frontier of condensed matter physics, leading to discoveries of various light-induced phases of matter, such as superconductivity, ferroelectricity, magnetism, and charge density waves. However, in most cases, the photoinduced phases return to equilibrium on ultrafast timescales after the light is turned off, limiting their practical applications.