H2020

A. Wallraff (outreach talk): Quantum Engineering Workshop

A. Wallraff (outreach talk): Quantum Engineering Workshop: Engineering needs and challenges in quantum technology, The Barbican Centre, London, U.K., Nov. 23 - 24, 2017, Engineering needs and challenges in quantum information processing with superconducting circuits

A. Wallraff (outreach talk): WIS-ETHZ Quantum Workshop

A. Wallraff (outreach talk): WIS-ETHZ Quantum Workshop, Weizmann Institute of Science (WIS), Rehovot, Israel, Nov. 22, 2016, The future of quantum information

A. Wallraff (outreach talk): Swiss Quantum Day

A. Wallraff (outreach talk): Swiss Quantum Day, Pädagogische Hochschule Bern, Bern, Switzerland, May 4, 2017, Quantum Science and Technology with Superconducting Circuits

A. Wallraff (outreach talk): Quantum Science Club

A. Wallraff (outreach talk): Quantum Science Club, ETH Zürich, Nov. 8, 2016, Quantum Science and Engineering at ETH Zurich

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.

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