Vladimir Jurko Glaser was a theoretical physicist working on quantum field theory

Quantum field theory

Quantum field theory provides a theoretical framework for constructing quantum mechanical models of systems classically parametrized by an infinite number of dynamical degrees of freedom, that is, fields and many-body systems. It is the natural and quantitative language of particle physics and...

 and the canonization of the analytic S-matrix.

He was head of the Department of Theoretical Physics at the Ruđer Bošković Institute in Zagreb

Zagreb

Zagreb is the capital and the largest city of the Republic of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. According to the last official census, Zagreb's city...

.

In 1955, he published one of the first monographs on Quantum Electrodynamics

Quantum electrodynamics

Quantum electrodynamics is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved...

, Kovarijantna kvantna elektrodinamika (in Croatian

Croatian language

Croatian is the collective name for the standard language and dialects spoken by Croats, principally in Croatia, Bosnia and Herzegovina, the Serbian province of Vojvodina and other neighbouring countries...

).

In 1957 he left Croatia since he found permanent employment

Permanent Employment

Permanent employees or regular employees work for a single employer and are paid directly by that employer. In addition to their wages, they often receive benefits like subsidized health care, paid vacations, holidays, sick time, or contributions to a retirement plan. Permanent employees are often...

 at the Department of Theoretical Physics of CERN

CERN

The European Organization for Nuclear Research , known as CERN , is an international organization whose purpose is to operate the world's largest particle physics laboratory, which is situated in the northwest suburbs of Geneva on the Franco–Swiss border...

, Geneva

Geneva

Geneva In the national languages of Switzerland the city is known as Genf , Ginevra and Genevra is the second-most-populous city in Switzerland and is the most populous city of Romandie, the French-speaking part of Switzerland...

.

Together with Henri Epstein, he found a new approach to renormalization

Renormalization

In quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, renormalization is any of a collection of techniques used to treat infinities arising in calculated quantities....

 theory (causal perturbation theory

Causal perturbation theory

Causal perturbation theory is a mathematically rigorous approach to renormalization theory, which makesit possible to put the theoretical setup of perturbative quantum field theory on a sound mathematical basis....

), where ultraviolet divergence

Ultraviolet divergence

In physics, an ultraviolet divergence is a situation in which an integral, for example a Feynman diagram, diverges because of contributions of objects with very high energy , or, equivalently, because of physical phenomena at very short distances. An infinite answer to a question that should have a...

s are avoided in the calculation of Feynman diagrams by using mathematically well-defined quantities only.

External links

• http://www.hr/darko/etf/et22.html#glaser
• http://knjiznica.irb.hr/hrv/znanost/fizika/glaser.html