RySQ

Quantum Science and Technology with Superconducting Circuits

Date: 
2016-11-21
Author(s): 

A. Wallraff

Conference/Workshop/Place: 
HUJI-ETHZ Quantum Workshop, Hebrew University (HUJI), Jerusalem, Israel
Format: 
Invited Talk

Cavity dispersive shift induced by Rydberg atoms

Date: 
2016-11-03
Author(s): 

S. Garcia

Conference/Workshop/Place: 
QSIT lunch seminar, ETH Zurich
Format: 
Invited Talk

Cavity quantum electrodynamics provide a very powerful way to measure light states with atoms or atoms states with light via quantum non-demolition measurements. We present an experiment where the transmission of a weak probe through a microwave cavity allows to measure the dispersive shift induced by Rydberg atoms.

Observation of Rydberg-Atom Macrodimers: Micrometer-Sized Diatomic Molecules

Date: 
2016-08-19
Author(s): 

Heiner Saßmannshausen and Johannes Deiglmayr

Reference: 

Phys. Rev. Lett. 117, 083401

Long-range metastable molecules consisting of two cesium atoms in high Rydberg states have been observed in an ultracold gas.

Long-range interactions between Rydberg atoms

Date: 
2016-09-22
Author(s): 

Johannes Deiglmayr

Reference: 

Phys. Scr. 91, 104007

We present an overview over theoretical models to describe adiabatic potential-energy curves, experimental excitation spectra, and electronic and nuclear dynamics in interacting Rydberg-atom pairs at large internuclear separations. The potential-energy curves and molecular wavefunctions are determined from the multipole expansion of the static Coulomb interaction which is evaluated numerically in a product basis of atomic orbitals.

Observation of enhanced rate coefficients in the H+2+H2→H+3+H reaction at low collision energies

Date: 
2016-12-29
Author(s): 

Pitt Allmendinger, Johannes Deiglmayr, Katharina Höveler, Otto Schullian, and Frédéric Merkt

Reference: 

The Journal of Chemical Physics 145, 244316

The energy dependence of the rate coefficient of the H2+ + H2 -> H3+ + H reaction has been measured in the range of collision energies between kB * 10 K and kB * 300 mK.

Measuring the polarization of electromagnetic fields using Rabi-rate measurements with spatial resolution: Experiment and theory

Date: 
2017-05-24
Author(s): 

J. Koepsell, T. Thiele, J. Deiglmayr, A. Wallraff, and F. Merkt

Reference: 

Phys. Rev. A 95, 053860

When internal states of atoms are manipulated using coherent optical or radio-frequency (rf) radiation, it is essential to know the polarization of the radiation with respect to the quantization axis of the atom.

Measuring the dispersive frequency shift of a rectangular microwave cavity induced by an ensemble of Rydberg atoms

Date: 
2017-05-24
Author(s): 

M. Stammeier, S. Garcia, T. Thiele, J. Deiglmayr, J. A. Agner, H. Schmutz, F. Merkt, and A. Wallraff

Reference: 

Phys. Rev. A 95, 053855

In recent years the interest in studying interactions of Rydberg atoms or ensembles thereof with optical and microwave frequency fields has steadily increased, both in the context of basic research and for potential applications in quantum information processing.

Public Lecture KITP Santa Barbara, 11/2016

Talk by Immanuel Bloch, "Realizing Richard Feynman’s Dream of a Quantum Simulator"

Second international UQUAM workshop, Innsbruck, 09/2015

Talk by Johannes Zeiher, "Rydberg dressing with p-states"

Workshop "Correlation and Order in Rydberg Gases", Lorentz Center Leiden, 06/2016

Talk by Johannes Zeiher, "Controlling long-range interactions by Rydberg-dressing"

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