Upcoming events

  • Clore Seminar on Soft and Biological Physics – Sundays, 13:00, Drory Auditorium
  • Statistical Physics Seminar – Mondays, 14:15, Seminar Room A
  • Atomic, Molecular, and Optical Seminar (AMOS) – Tuesdays, 13:15, Weismann Auditorium

AMO Journal Club

DateTuesday, June 27, 2017

Time13:15

LocationEdna and K.B. Weissman Building of Physical Sciences

AMO Journal Club

DateTuesday, July 4, 2017

Time13:15

LocationEdna and K.B. Weissman Building of Physical Sciences

AbstractSpeakers: Dekel Raanan, Eilon Poem-Kalogerakis

AMO Special Seminar

DateTuesday, July 11, 2017

Time13:15

LecturerDr. Moti Fridman

LocationEdna and K.B. Weissman Building of Physical Sciences

AbstractExtreme waves suddenly appearing from noisy background and disappearing immediately after. Ancient tales from sailors on such waves were told but considered as a pure myth. We investigate the dynamics of optical rogue waves in a record high resolution and focused on their power dependence and vectorial nature. We demonstrated three types of rogue waves and claim that all known mechanisms can not explain our findings, and therefore, a new mechanism must be considered.

AMO Special Seminar

DateTuesday, July 18, 2017

Time13:15

DetailsJILA & University of Colorado, Boulder

LecturerDr. Gil Porat

LocationEdna and K.B. Weissman Building of Physical Sciences

AbstractHigh precision spectroscopy of few-electron atoms and ions is strongly motivated by the need to test fundamental theory (e.g., quantum electrodynamics) in simple systems, amenable to precise calculation for comparison with experimental measurement. Additionally, transitions from the ground state are most susceptible to both QED and nuclear structure effects, making them appealing as tools for testing nuclear structure theory. The frequencies of transitions from the ground state in many such systems reside in the extreme ultraviolet range of the electromagnetic spectrum (XUV, wavelengths of 10-120 nm). However, spectroscopic resolution in the XUV is severely limited by the availability of appropriate sources of XUV radiation. In this talk I will discuss our experimental method of generating an XUV frequency comb laser, and our progress in scaling up the power of this laser in order to enable the highest spectroscopic precision in the XUV to date.

AMO Special Seminar

DateSunday, July 23, 2017

Time11:00

Details5. Physikalisches Institut, Universität Stuttgart and IQST

LecturerDr. Igor Ferrier-Barbut

LocationEdna and K.B. Weissman Building of Physical Sciences

AbstractI will present experimental results on magnetic quantum fluids. These consist of a dilute Bose-Einstein condensate of dysprosium atoms, the most magnetic stable element. They allow to study the many-body consequences of the anisotropic and long-range dipole-dipole interaction, benefitting from the control tools of ultracold atomic physics. First, we have observed in this system an unanticipated phase-transition between a gas and a liquid, characterized by the formation of self-bound droplets [1-3]. It forms in a parameter region where the existing theory, based on the mean-field approximation, predicted a mechanical collapse of the gas. We showed that the repulsive beyond meanfield corrections prevent the collapse and are responsible for the stabilization of the liquid [2]. These corrections arise from quantum fluctuations (zero-point motion) of the collective modes (Bogolyubov sound modes) in the quantum fluid. In recent work we show that in constrained geometries, the ground-state is selforganized (left image). Studying these geometries experimentally, we indeed observe stable self-organized ‘stripe’ phases (right image), likely in metastable excited states. I will discuss the prospects for a strange kind of supersolidity in this system. In other experiments we study the effect of a rotating magnetic field on a quantum droplet, as a tool for the study of the different low-lying collective modes of the system. [1] Observing the Rosensweig instability of a quantum ferrofluid, H. Kadau, M. Schmitt, M. Wenzel, C. Wink, T. Maier, I. Ferrier-Barbut, and T. Pfau, Nature 530, 194 (2016). [2] Observation of quantum droplets in a strongly dipolar Bose gas, I. Ferrier-Barbut, H. Kadau, M. Schmitt, M. Wenzel, and T. Pfau, Phys. Rev. Lett. 116, 215301 (2016). [3] Self-bound droplets of a dilute magnetic quantum liquid, M. Schmitt, M. Wenzel, F. Böttcher, I. Ferrier-Barbut and T. Pfau, Nature 539, 259 (2016).

There are no upcoming events