1985 …2020

Research output per year

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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., van Weerden, T., van der Werf, Y., Johri, T., Vredenbregt, E. J. D. & Kokkelmans, S. J. J. M. F., 28 Apr 2020, In : Journal of Physics B: Atomic, Molecular and Optical Physics. 53, 8, 10 p., 084008.

Research output: Contribution to journalArticleAcademicpeer-review

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 journalArticleAcademic

Open Access
File
  • 13 Downloads (Pure)

    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 journalArticleAcademicpeer-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 journalArticleAcademicpeer-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 journalArticleAcademicpeer-review

    Open Access
    File
  • 3 Citations (Scopus)
    62 Downloads (Pure)

    Activities

    • 10 Invited talk
    • 1 Contributed talk

    TOWARDS A HIGH RESOLUTION RB+ FIB

    E.J.D. Vredenbregt (Speaker)
    19 Jun 201722 Jun 2017

    Activity: Talk or presentation typesContributed talkScientific

    workshop Postmobility Experience Sharing

    Edgar Vredenbregt (Invited speaker)
    12 Sep 2016

    Activity: Talk or presentation typesInvited talkScientific

    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 typesInvited talkScientific

    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 typesInvited talkScientific

    Courses

    Experimental physics 1

    1/09/12 → …

    Course

    Experimental physics 2

    1/09/12 → …

    Course

    Experimental physics 3

    1/09/13 → …

    Course

    Introduction to quantum physics

    1/09/13 → …

    Course

    Ultracold quantum physics

    1/09/15 → …

    Course

    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 2008

    Supervisor: 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 2012

    Supervisor: 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 2013

    Supervisor: 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 1987

    Supervisor: Vredenbregt, E. (Supervisor 1) & Beijerinck, H. (Supervisor 2)

    Student thesis: Master

    File

    Beam quality determination methods for focused ion beams

    Author: Penterman, K., 2019

    Supervisor: Vredenbregt, E. J. (Supervisor 1), Wouters, S. (External coach) & ten Haaf, G. (External coach)

    Student thesis: Master

    File