Research Output per year
Personal profile
Quote
"The development of techniques to cool and trap atoms with laser light has greatly changed atomic physics research. Increasingly, applications emerge, with cold charged particle beams as a prime example."
Research profile
Edgar Vredenbregt is an associate professor with the research group Coherence and Quantum Technology at the TU/e department of Applied Physics. His research focuses on the use of atom trapping for quantum information research and to create a new class of charged particle sources, featuring ultracold electrons (10K) and ions (1mK). Both offer a new route toward high brightness by virtue of a high angular intensity. Applications of the ultracold sources are ultrafast electron diffraction and focused-ion beam instrumentation.
Ultracold ions can be extracted from a beam of laser-cooled atoms using photo-ionization, allowing for bright ion beams with a very small longitudinal energy spread (200 meV demonstrated). As a result Laser Cooled Focused Ion Beams provide a next-generation tool for observing, modifying and repairing silicon wafers, enabling milling on the 1 nanometer scale.
Rydberg atoms can fill the role of qubits with strong mutual interactions that can be harnessed to create quantum gates. A structured gas of Rydberg atoms is created by patterned laser-excitation of a trapped atomic cloud. Spectroscopy reveals effects of long-range interactions such as blockade and facilitation phenomena.
Academic background
Edgar Vredenbregt studied Applied Physics at Eindhoven University of Technology (TU/e, the Netherlands) where he received his MSc in 1986. In 1990, he obtained his PhD at TU/e in Atomic and Molecular Physics under supervision of professor Herman Beijerinck. From 1991 until 1993, he was a postdoctoral researcher at the QEX group of professor Harold Metcalf at the State University of New York at Stony Brook (USA). In 1993, he returned to TU/e to become a postdoctoral researcher in the development of intensified atomic beams. From 1995-2000, he was a fellow of the Royal Netherlands Academy of Arts and Sciences (KNAW) at TU/e, to perform research on ultra-cold collisions and intensified atomic beams. In 1998, he was a visiting research scientist with the laser cooling and trapping group at the National Institute of Standards and Technology (NIST) in Gaithersburg (USA). In 2000, Edgar Vredenbregt was appointed assistant professor at TU/e and in 2016 he was promoted to associate professor with the research group Coherence and Quantum Technology, department of Applied Physics.
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Research Output
Three-level rate equations in cold, disordered Rydberg gases
Skannrup, R. V., Weerden, T. V., Werf, Y. V. D., Johri, T., Vredenbregt, E. J. D. & Kokkelmans, S. J. J. M. F., 15 Jan 2020, In : arXiv. 10 p., 2001.05579v1.Research output: Contribution to journal › Article › Academic
Open Access
File
Energy spread of ultracold electron bunches extracted from a laser cooled gas
Franssen, J. G. H., Kromwijk, J. M., Vredenbregt, E. J. D. & Luiten, O. J., 16 Jan 2018, In : Journal of Physics B: Atomic, Molecular and Optical Physics. 51, 3, 7 p., 035007.Research output: Contribution to journal › Article › Academic › peer-review
2
Citations
(Scopus)
2
Downloads
(Pure)
Measurements of the energy distribution of a high brightness rubidium ion beam
ten Haaf, G., Wouters, S. H. W., Nijhof, D. F. J., Mutsaers, P. H. A. & Vredenbregt, E. J. D., Jul 2018, In : Ultramicroscopy. 190, p. 12-20 9 p.Research output: Contribution to journal › Article › Academic › peer-review
1
Citation
(Scopus)
2
Downloads
(Pure)
Cavity-enhanced photoionization of an ultracold rubidium beam for application in focused ion beams
ten Haaf, G., Wouters, S. H. W., Mutsaers, P. H. A. & Vredenbregt, E. J. D., 13 Nov 2017, In : Physical Review A : Atomic, Molecular and Optical Physics. 96, 5, 12 p., 053412.Research output: Contribution to journal › Article › Academic › peer-review
Open Access
File
3
Citations
(Scopus)
56
Downloads
(Pure)
Direct magneto-optical compression of an effusive atomic beam for application in a high-resolution focused ion beam
ten Haaf, G., de Raadt, T., Offermans, G. P., van Rens, J. F. M., Mutsaers, P. H. A., Vredenbregt, E. J. D. & Wouters, S. H. W., 22 May 2017, In : Physical Review Applied. 7, 5, 12 p., 054013.Research output: Contribution to journal › Article › Academic › peer-review
Open Access
File
6
Citations
(Scopus)
102
Downloads
(Pure)
Activities
TOWARDS A HIGH RESOLUTION RB+ FIB
E.J.D. Vredenbregt (Speaker)19 Jun 2017 → 22 Jun 2017
Activity: Talk or presentation types › Contributed talk › Scientific
workshop Postmobility Experience Sharing
Edgar Vredenbregt (Invited speaker)12 Sep 2016
Activity: Talk or presentation types › Invited talk › Scientific
iCord_International Conference on Rydberg at Durham, Durham University, Joint Quantum Centre, Durham, UK
Edgar Vredenbregt (Invited speaker)3 Jul 2015
Activity: Talk or presentation types › Invited talk › Scientific
PPG seminar, Quantum, Atomic, Molecular and Plasma Physics (QuAMP), Calman Learning Centre, Summer School, Newcastle University, Durham, UK
Edgar Vredenbregt (Invited speaker)16 Sep 2014
Activity: Talk or presentation types › Invited talk › Scientific
Coldbeams: Ultra-Cold Gas for Bright Electron and Monochromatic Ion Source Workshop, October 1-3, 2012, Nimes, France
Edgar Vredenbregt (Invited speaker)1 Oct 2012
Activity: Talk or presentation types › Invited talk › Scientific
Courses
Impacts
Ultracold ion beams
Edgar J.D. Vredenbregt (Researcher), Rianne Sanders (Content manager)
Impact: Research Topic/Theme (at group level)
File
Student theses
2D magneto-optical trap as source for cold ions
Author: Kusters, D., 31 Oct 2008Supervisor: Vredenbregt, E. (Supervisor 1) & Reijnders, M. (Supervisor 2)
Student thesis: Master
File
A new high-brightness ion source: the atomic beam laser-cooled ion source
Author: Notermans, R., 31 Aug 2012Supervisor: Vredenbregt, E. (Supervisor 1)
Student thesis: Master
File
Atomic Beam Laser-cooled Ion Source : towards sub-nm ion beam milling
Author: ten Haaf, G., 30 Nov 2013Supervisor: Vredenbregt, E. (Supervisor 1) & Wouters, S. (Supervisor 2)
Student thesis: Master
File
Beam experiments on KrF, XeF, KrBr and XeBr excimer formation
Author: Vrakking, M., 31 Aug 1987Supervisor: Vredenbregt, E. (Supervisor 1) & Beijerinck, H. (Supervisor 2)
Student thesis: Master
File
Beam quality determination methods for focused ion beams
Author: Penterman, K., 2019Supervisor: Vredenbregt, E. J. (Supervisor 1), Wouters, S. (External coach) & ten Haaf, G. (External coach)
Student thesis: Master
File