H2020

Calculation of Rydberg interaction potentials

Date: 
2017-06-12 - 2018-02-12
Author(s): 

Sebastian Weber, Christoph Tresp, Henri Menke, Alban Urvoy, Ofer Firstenberg, Hans Peter Büchler, and Sebastian Hofferberth

Reference: 

Journal of Physics B: Atomic, Molecular and Optical Physics, Volume 50, Number 13 (2017)

The strong interaction between individual Rydberg atoms provides a powerful tool exploited in an ever-growing range of applications in quantum information science, quantum simulation and ultracold chemistry. One hallmark of the Rydberg interaction is that both its strength and angular dependence can be fine-tuned with great flexibility by choosing appropriate Rydberg states and applying external electric and magnetic fields.

Exploring quantum phases by driven dissipation

Date: 
2015-07-29
Author(s): 

Nicolai Lang and Hans Peter Büchler

Reference: 

Phys. Rev. A 92, 012128 (2015)

Dephasing and decay are the intrinsic dissipative processes prevalent in any open quantum system and the dominant mechanisms for the loss of coherence and entanglement. This inadvertent effect not only can be overcome but can even be capitalized on in a dissipative quantum simulation by means of tailored couplings between the quantum system and the environment.

Controlling Stray Electric Fields on an Atom Chip for Rydberg Experiments

Date: 
2017-10-15
Author(s): 

D. Davtyan, S. Machluf, M. L. Soudijn, J. B. Naber, N. J. van Druten, van Linden van den Heuvell, R. J. C. Spreeuw

Reference: 

arXiv:1710.05301

Experiments handling Rydberg atoms near surfaces must necessarily deal with the high sensitivity of Rydberg atoms to (stray) electric fields that typically emanate from adsorbates on the surface. We demonstrate a method to modify and reduce the stray electric field by changing the adsorbates distribution. We use one of the Rydberg excitation lasers to locally affect the adsorbed dipole distribution.

Trapping of Rydberg atoms in tight magnetic microtraps

Date: 
2018-01-31
Author(s): 

A. G. Boetes, R. V. Skannrup, J. Naber, S. J. J. M. F. Kokkelmans, and R. J. C. Spreeuw

Reference: 

PHYSICAL REVIEW A 97, 013430 (2018)

We explore the possibility to trap Rydberg atoms in tightly confining magnetic microtraps. The trapping frequencies for Rydberg atoms are expected to be influenced strongly by magnetic-field gradients. We show that there are regimes where Rydberg atoms can be trapped. Moreover, we show that so-called magic trapping conditions can be found for certain states of rubidium, where both Rydberg atoms and ground-state atoms have the same trapping frequencies. Magic trapping is highly beneficial for implementing quantum gate operations that require long operation times.

QuantERA Projects' Launch Event in Bucharest, Romania

Date: 
2018-04-24 - 2018-04-25
Registration deadline: 
2018-02-28 (All day)
Place: 
Bucharest, Romania

 

The launch of the projects funded within the QuantERA Call 2017 will be officially celebrated at the Projects’ Launch Event in Bucharest, Romania.

The event will take place on:

Rydberg electrometry for optical lattice clocks

Date: 
2018-02-02
Author(s): 

W. Bowden, R. Hobson, P. Huillery, P. Gill, M. P. A. Jones, and I. R. Hill

Reference: 

Physical Review A 96, 023419 (2017)

URL: 

10.1103/PhysRevA.96.023419

Electrometry is performed using Rydberg states to evaluate the quadratic Stark shift of the 5s2 1S0-5s5p 3P0 clock transition in strontium. By measuring the Stark shift of the highly excited 5s75d 1D2 state using electromagnetically induced transparency, we characterize the electric field with sufficient precision to provide tight constraints on the systematic shift to the clock transition.

Quantitative simulation of a magneto-optical trap operating near the photon recoil limit

Date: 
2017-06-21 - 2017-11-22
Author(s): 

Ryan K. Hanley, Paul Huillery, Niamh C. Keegan, Alistair D. Bounds, Danielle Boddy, Riccardo Faoro & Matthew P. A. Jones

Reference: 

10.1080/09500340.2017.1401679

URL: 

10.1080/09500340.2017.1401679

We present a quantitative model for magneto-optical traps operating on narrow transitions, where the transition linewidth and the recoil shift are comparable. We combine a quantum treatment of the light scattering process with a Monte-Carlo simulation of the atomic motion.

A Rydberg-dressed Magneto-Optical Trap

Date: 
2018-01-11
Author(s): 

A. D. Bounds, N. C. Jackson, R. K. Hanley, R. Faoro, E. M. Bridge, P. Huillery, M. P. A. Jones

Reference: 

arXiv:1801.03846

URL: 

arXiv:1801.03846

We propose and demonstrate the laser cooling and trapping of Rydberg-dressed Sr atoms.

A two-species five-beam magneto-optical trap for highly magnetic Er and Dy atoms

Date: 
2017-11-20
Author(s): 

P. Ilzhöfer, G. Durastante, A. Patscheider, A. Trautmann, M. J. Mark, F. Ferlaino

Reference: 

arXiv:1711.07378

We report on the first realization of a two-species magneto-optical trap (MOT) for erbium and dysprosium. The MOT operates on an intercombination line for the respective species. Owing to the narrow-line character of such a cooling transition and the action of gravity, we demonstrate a novel trap geometry employing only five beams in orthogonal configuration. We observe that the mixture is cooled and trapped very efficiently, with up to 5*108 Er atoms and 1*109 Dy atoms at temperatures of about 10 uK.

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

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