Vladimir Jurko Glaser (21 April 1924 – 22 January 1984) was a

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capit ...

theoretical physicist Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimen ...

working on

quantum field theory In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics. QFT is used in particle physics to construct physical models of subatomic particles and ...

and the canonization of the analytic

S-matrix In physics, the ''S''-matrix or scattering matrix relates the initial state and the final state of a physical system undergoing a scattering process. It is used in quantum mechanics, scattering theory and quantum field theory (QFT). More forma ...

Biography

Glaser was born in

Gorizia Gorizia (; sl, Gorica , colloquially 'old Gorizia' to distinguish it from Nova Gorica; fur, label= Standard Friulian, Gurize, fur, label= Southeastern Friulian, Guriza; vec, label= Bisiacco, Gorisia; german: Görz ; obsolete English ''Gorit ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

. His father, Vladimir Glaser, was a prominent Slovene lawyer and minority rights activist. His mother, Ana née Besednjak, was the sister of the politician Engelbert Besednjak. His paternal aunt Eleonora (Lola) was married to the famous neurologist

Constantin von Economo Constantin Freiherr von Economo ( gr, Κωνσταντίνος Οικονόμου; 21 August 1876 – 21 October 1931) was an Austrian psychiatrist and neurologist of Greek descent, born in modern-day Romania (then Ottoman Empire). He is most ...

. The family fled to Yugoslavia in 1929, first to

Maribor Maribor ( , , , ; also known by other #Name, historical names) is the second-largest city in Slovenia and the largest city of the traditional region of Styria (Slovenia), Lower Styria. It is also the seat of the City Municipality of Maribor, th ...

, then to

Belgrade Belgrade ( , ;, ; Names of European cities in different languages: B, names in other languages) is the Capital city, capital and List of cities in Serbia, largest city in Serbia. It is located at the confluence of the Sava and Danube rivers a ...

, Odžaci and finally to

Zagreb Zagreb ( , , , ) is the capital (political), capital and List of cities and towns in Croatia#List of cities and towns, largest city of Croatia. It is in the Northern Croatia, northwest of the country, along the Sava river, at the southern slop ...

in 1941. He graduated

physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ...

from the University of Zagreb in 1949 and later was attending seminar of

Werner Heisenberg Werner Karl Heisenberg () (5 December 1901 – 1 February 1976) was a German theoretical physicist and one of the main pioneers of the theory of quantum mechanics. He published his work in 1925 in a breakthrough paper. In the subsequent series ...

(1951-52) at

Göttingen Göttingen (, , ; nds, Chöttingen) is a college town, university city in Lower Saxony, central Germany, the Capital (political), capital of Göttingen (district), the eponymous district. The River Leine runs through it. At the end of 2019, t ...

. Based on work carried out in

under

Heisenberg Werner Karl Heisenberg () (5 December 1901 – 1 February 1976) was a German theoretical physicist and one of the main pioneers of the theory of quantum mechanics. He published his work in 1925 in a breakthrough paper. In the subsequent series ...

he received a doctorate degree from the University of Zagreb. Being a part of Heisenberg's group at

he later worked with many famous physicists such as

Harry Lehmann Harry Lehmann (21 March 1924 in Güstrow22 November 1998 in Hamburg) was a German physicist. Biography Lehmann studied physics at Rostock and the Humboldt-Universität zu Berlin. In 1952 he worked at the Max-Planck-Institut in Göttingen, and s ...

Wolfhart Zimmermann Wolfhart Zimmermann (17 February 1928 – 18 September 2016) was a German theoretical physicist. Zimmermann attained a doctorate in 1950 at Freiburg im Breisgau in topology ("Eine Kohomologietheorie topologischer Räume"). Biography Zimmermann w ...

(on extensions of LSZ formalism) and

Walter Thirring Walter Thirring (29 April 1927 – 19 August 2014) was an Austrian physicist after whom the Thirring model in quantum field theory is named. He was the son of the physicist Hans Thirring.Thirring, H. Über die Wirkung rotierender ferner Massen ...

. From 1955 to 1957 he was head of the Department of Theoretical Physics at the Ruđer Bošković Institute in

. In 1957 he found a permanent employment at the Department of Theoretical Physics of

CERN The European Organization for Nuclear Research, known as CERN (; ; ), is an intergovernmental organization that operates the largest particle physics laboratory in the world. Established in 1954, it is based in a northwestern suburb of Gene ...

Geneva Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the List of cities in Switzerland, second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaki ...

. He died in

. In 1955, he published one of the first monographs on quantum electrodynamics, ''Kovarijantna kvantna elektrodinamika'' (in Croatian). With

French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...

physicists

Jacques Bros Ancient and noble French family names, Jacques, Jacq, or James are believed to originate from the Middle Ages in the historic northwest Brittany region in France, and have since spread around the world over the centuries. To date, there are over ...

and Henri Epstein he worked on setting up analyticity properties required for the use of dispersion relations in high energy collisions.

Epstein The surname Epstein ( yi, עפּשטײן, Epshteyn) is one of the oldest Ashkenazi Jewish family names. It is probably derived from the German town of Eppstein, in Hesse; the place-name was probably derived from Gaulish ''apa'' ("water", in the sen ...

, Glaser and

Arthur Jaffe Arthur Michael Jaffe (; born December 22, 1937) is an American mathematical physicist at Harvard University, where in 1985 he succeeded George Mackey as the Landon T. Clay Professor of Mathematics and Theoretical Science. Education and career ...

proved that (Wightman) quantum fields can necessarily have negative energy density values. Together with Henri Epstein, he found a new approach to renormalization theory called

causal perturbation theory Causal perturbation theory is a mathematically rigorous approach to renormalization theory, which makes it possible to put the theoretical setup of perturbative quantum field theory on a sound mathematical basis. It goes back to a seminal work ...

, where ultraviolet divergences are avoided in the calculation of Feynman diagrams by using mathematically well-defined quantities only.

References

Croatian physicists Slovenian physicists People associated with CERN 1924 births 1984 deaths Italian emigrants to Yugoslavia Yugoslav physicists {{physicist-stub