Berthold-Georg Englert

Last updated

Berthold-Georg Englert (born 1953) is Provost's Chair Professor at the National University of Singapore, and Principal Investigator at the Centre for Quantum Technologies. [1] In 2006, he was recognized for outstanding contributions to theoretical research on quantum coherence. [2] Englert's principal research interests concern applications in quantum information science, but he is also known for his early work on quantum optics together with Marlan Scully at Texas A&M University. [3]

Contents

Education and career

Englert studied physics at the University of Tübingen and obtained his Ph.D. in Physics there in 1981. He did post-doctoral research at the Ludwig Maximilian University of Munich (LMU) and obtained his Dr. rer. nat. habil. in 1990. Subsequently he worked as a researcher at LMU until 1995 and then held different visiting professorships in Europe and the United States until he joined the faculty of the National University of Singapore in 2003. [4]

Englert was named American Physical Society (APS) Outstanding Referee in 2008, he is Fellow of the Institute of Physics Singapore (IPS) since 2012, Fellow of the APS since 2015, and recipient of the IPS President Medal for 2019. [4] He is the Scientific Secretary of the Julian Schwinger Foundation. [5]

Scientific contributions

Englert is the author of more than 180 publications in the fields of atomic, molecular and optical physics. [6] As of November 2023 his research has been cited more than 7,600 times for a h index of 41. [7]

Englert's most cited works are from the areas of quantum optics and quantum information. With Marlan Scully and Herbert Walther, he proposed a quantum optical test of quantum mechanical complementarity. [8] He also derived an inequality by which the visibility of interference fringes in interferometer experiments sets an upper bound on the which-way information available. [9]

In 1998 he studied with three co-authors he studied the interaction of two ultracold atoms in a three-dimensional trap and obtained an analytical solution which extended the previously know one- and two-dimensional limiting cases to the more realistic three-dimensional one. [10]

He is co-author of frequently cited reviews on cavity quantum electrodynamics [11] and on mutually unbiased bases. [12]

He edited and published Symbolism of Atomic Measurements [13] based on lecture notes by Julian Schwinger, which has been called „a delight and a wonderful resource to a theoretical physicist“ and judged to come as close as possible to the „definitive textbook“ on quantum mechanics that Schwinger had intended to write. [14]

Honors and awards

In 2015, Englert was inducted as a fellow of the American Physical Society for "distinctive theoretical contributions to the foundations, interpretation, and applications of quantum mechanics". [15]

See also

Related Research Articles

<span class="mw-page-title-main">Julian Schwinger</span> American theoretical physicist (1918–1994)

Julian Seymour Schwinger was a Nobel Prize-winning American theoretical physicist. He is best known for his work on quantum electrodynamics (QED), in particular for developing a relativistically invariant perturbation theory, and for renormalizing QED to one loop order. Schwinger was a physics professor at several universities.

<span class="mw-page-title-main">Willis Lamb</span> American physicist (1913–2008)

Willis Eugene Lamb Jr. was an American physicist who won the Nobel Prize in Physics in 1955 "for his discoveries concerning the fine structure of the hydrogen spectrum." The Nobel Committee that year awarded half the prize to Lamb and the other half to Polykarp Kusch, who won "for his precision determination of the magnetic moment of the electron." Lamb was able to precisely determine a surprising shift in electron energies in a hydrogen atom. Lamb was a professor at the University of Arizona College of Optical Sciences.

The Schwinger's quantum action principle is a variational approach to quantum mechanics and quantum field theory. This theory was introduced by Julian Schwinger in a series of articles starting 1950.

In physics, complementarity is a conceptual aspect of quantum mechanics that Niels Bohr regarded as an essential feature of the theory. The complementarity principle holds that certain pairs of complementary properties cannot all be observed or measured simultaneously, for examples, position and momentum or wave and particle properties. In contemporary terms, complementarity encompasses both the uncertainty principle and wave-particle duality.

<span class="mw-page-title-main">History of quantum field theory</span>

In particle physics, the history of quantum field theory starts with its creation by Paul Dirac, when he attempted to quantize the electromagnetic field in the late 1920s. Major advances in the theory were made in the 1940s and 1950s, leading to the introduction of renormalized quantum electrodynamics (QED). The field theory behind QED was so accurate and successful in predictions that efforts were made to apply the same basic concepts for the other forces of nature. Beginning in 1954, the parallel was found by way of gauge theory, leading by the late 1970s, to quantum field models of strong nuclear force and weak nuclear force, united in the modern Standard Model of particle physics.

In quantum mechanics, a quantum eraser experiment is an interferometer experiment that demonstrates several fundamental aspects of quantum mechanics, including quantum entanglement and complementarity. The quantum eraser experiment is a variation of Thomas Young's classic double-slit experiment. It establishes that when action is taken to determine which of 2 slits a photon has passed through, the photon cannot interfere with itself. When a stream of photons is marked in this way, then the interference fringes characteristic of the Young experiment will not be seen. The experiment also creates situations in which a photon that has been "marked" to reveal through which slit it has passed can later be "unmarked." A photon that has been "unmarked" will interfere with itself once again, restoring the fringes characteristic of Young's experiment.

The wave–particle duality relation, often loosely referred to as the Englert–Greenberger–Yasin duality relation, or the Englert–Greenberger relation, relates the visibility, , of interference fringes with the definiteness, or distinguishability, , of the photons' paths in quantum optics. As an inequality:

Marlan Orvil Scully is an American physicist best known for his work in theoretical quantum optics. He is a professor at Texas A&M University and Princeton University. Additionally, in 2012 he developed a lab at the Baylor Research and Innovation Collaborative in Waco, Texas.

For classical dynamics at relativistic speeds, see relativistic mechanics.

<span class="mw-page-title-main">Columbia University Physics Department</span>

The Columbia University Physics Department includes approximately 40 faculty members teaching and conducting research in the areas of astrophysics, high energy nuclear physics, high energy particle physics, atomic-molecular-optical physics, condensed matter physics, and theoretical physics.

<span class="mw-page-title-main">François Englert</span> Belgian theoretical physicist

François, Baron Englert is a Belgian theoretical physicist and 2013 Nobel Prize laureate.

Carl M. Bender is an American applied mathematician and mathematical physicist. He currently holds the Wilfred R. and Ann Lee Konneker Distinguished Professorship of Physics at Washington University in St. Louis. He also has joint positions as professor of physics at the University of Heidelberg and as visiting professor of applied mathematics and mathematical physics at Imperial College, London.

Eugen Merzbacher was an American physicist.

Herbert Walther was a leader in the fields of quantum optics and laser physics. He was a founding director of the Max Planck Institute of Quantum Optics (MPQ) in Garching, Germany. He also was Chair of Physics at Ludwig Maximilian University of Munich. He is primarily known for his experimental work on cavity quantum electrodynamics as well his groundbreaking work on the ion trap.

Cavity quantum electrodynamics is the study of the interaction between light confined in a reflective cavity and atoms or other particles, under conditions where the quantum nature of photons is significant. It could in principle be used to construct a quantum computer.

<span class="mw-page-title-main">Wolfgang P. Schleich</span> German physicist

Wolfgang P. Schleich is professor of theoretical physics and director of the quantum physics department at the University of Ulm.

<span class="mw-page-title-main">Gerhard Rempe</span> German physicist and professor

Gerhard Rempe is a German physicist, Director at the Max Planck Institute of Quantum Optics and Honorary Professor at the Technical University of Munich. He has performed pioneering experiments in atomic and molecular physics, quantum optics and quantum information processing.

Maciej Lewenstein, is a Polish theoretical physicist, currently an ICREA professor at ICFO – The Institute of Photonic Sciences in Castelldefels near Barcelona. He is an author of over 480 scientific articles and 2 books, and recipient of many international and national prizes. In addition to quantum physics his other passion is music, and jazz in particular. His collection of compact discs and vinyl records includes over 9000 items.

<span class="mw-page-title-main">Jun Ye</span> Chinese-American physicist

Jun Ye is a Chinese-American physicist at JILA, National Institute of Standards and Technology, and the University of Colorado Boulder, working primarily in the field of atomic, molecular, and optical physics.

<i>Classical Electrodynamics</i> (book) Graduate textbook by J.D. Jackson

Classical Electrodynamics is a textbook written by theoretical particle and nuclear physicist John David Jackson. The book originated as lecture notes that Jackson prepared for teaching graduate-level electromagnetism first at McGill University and then at the University of Illinois at Urbana-Champaign. Intended for graduate students, and often known as Jackson for short, it has been a standard reference on its subject since its first publication in 1962.

References

  1. ↑ "CQT Research Group". Archived from the original on 2011-10-01. Retrieved 2011-08-13.
  2. ↑ A*STAR "Winner Citation, National Science Award". 2006. Archived from the original on 2012-03-27.
  3. ↑ "2018 Stanley Corrsin Award Recipient".
  4. 1 2 "Curriculum Vitae" (PDF). 2021-01-17. Retrieved 2023-11-16.
  5. ↑ "Julian Schwinger Foundation".
  6. ↑ List of publications
  7. ↑ "Citation Report: Berthold-Georg Englert". webofscience.com. Retrieved 2023-11-16.
  8. ↑ Scully, Marlan O.; Englert, B. G.; Walther, Herbert (1991). "Quantum optical tests of complementarity". Nature. 351 (6322): 111–116. Bibcode:1991Natur.351..111S. doi:10.1038/351111a0. S2CID   4311842.
  9. ↑ Berthold-Georg Englert (1996). "Fringe visibility and which-way information: An inequality". Physical Review Letters. 77 (11): 2154–2157. Bibcode:1996PhRvL..77.2154E. doi:10.1103/PhysRevLett.77.2154. PMID   10061872.
  10. ↑ Busch, Thomas; Englert, BG; Rzażewski, Kazimierz; Wilkens, Martin (1998). "Two cold atoms in a harmonic trap". Foundations of Physics. 28 (4): 549–559. doi:10.1023/A:1018705520999.
  11. ↑ Walther, Herbert; Varcoe, Benjamin T. H.; Englert, Berthold-Georg; Becker, Thomas (2006). "Cavity quantum electrodynamics". Reports on Progress in Physics. 69 (5): 1325–1382. Bibcode:2006RPPh...69.1325W. doi:10.1088/0034-4885/69/5/R02. S2CID   122420445.
  12. ↑ Durt, Thomas; Englert, Berthold-Georg; Bengtsson, Ingemar; Życzkowski, Karol (2010). "On mutually unbiased bases". International Journal of Quantum Information. 8 (4): 535–640. arXiv: 1004.3348 . doi:10.1142/S0219749910006502. S2CID   118551747.
  13. ↑ Schwinger, Julian (2001). Quantum mechanics : symbolism of atomic measurements. Berlin New York: Springer. ISBN   3-540-41408-8. OCLC   45835557.
  14. ↑ Tom Kibble (21 September 2001). "Elegant spin on journey to the very heart of the matter" (PDF). The Times Higher Education Supplement.
  15. ↑ "APS Fellow Archive". American Physical Society. Retrieved 2024-01-20.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.