Kolloquien

Quantum many-body scars are highly excited states with atypical properties. They are remarkable because they do not follow the eigenstate thermalization hypothesis and lead to interesting dynamics. After a general introduction to the field, I will discuss how similar quantum scars are to ground states. In particular, quantum scars can undergo both adiabatic evolution and phase transitions. I will also introduce inverted quantum many-body scars. [mehr]

The Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves for the first time in 2015. Since then, hundreds more astrophysical observations have been confirmed. To detect these spacetime ripples requires measurement with sub-attometer precision. I will describe the quantum technologies that make such a measurement possible, enabling present and future discoveries. [mehr]

Quantum control of massive mechanical objects The question of how quantum mechanics applies to massive, macroscopic objects has fascinated scientists from the early days of quantum theory until now. While this question remains unanswered, techniques are being developed to control and measure increasingly complex systems in the quantum regime. Such efforts are also motivated and propelled by the promise of new quantum technologies. [mehr]

In this talk I will discuss ongoing efforts in the Simon-Schuster collaboration at Stanford that leverage arrays of optical and microwave resonators for quantum science. On the microwave side, I will describe our Bose-Hubbard circuit platform and share experimental work assembling and studying liquids and solids of photons, culminating in our demonstration of manybody Ramsey spectroscopy as a probe of chemical potential and pressure in photon fluids. [mehr]