Roman Stanisław Ingarden (1 October 1920 in

Zakopane Zakopane ( Podhale Goral: ''Zokopane'') is a town in the extreme south of Poland, in the southern part of the Podhale region at the foot of the Tatra Mountains. From 1975 to 1998, it was part of Nowy Sącz Voivodeship; since 1999, it has been p ...

– 12 July 2011 in

Kraków Kraków (), or Cracow, is the second-largest and one of the oldest cities in Poland. Situated on the Vistula River in Lesser Poland Voivodeship, the city dates back to the seventh century. Kraków was the official capital of Poland until 159 ...

) was a Polish physicist, specialised mainly in

optics Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultra ...

and statistical mechanics, son of the Polish philosopher Roman Witold Ingarden. In 1938 he began his physics studies at the

Jan Kazimierz University in Lwów Jan, JaN or JAN may refer to: Acronyms * Jackson, Mississippi (Amtrak station), US, Amtrak station code JAN * Jackson-Evers International Airport, Mississippi, US, IATA code * Jabhat al-Nusra (JaN), a Syrian militant group * Japanese Article Numb ...

as student of professors

Juliusz Schauder Juliusz Paweł Schauder (; 21 September 1899, Lwów, Austria-Hungary – September 1943, Lwów, Occupied Poland) was a Polish mathematician of Jewish origin, known for his work in functional analysis, partial differential equations and m ...

Stefan Banach Stefan Banach ( ; 30 March 1892 – 31 August 1945) was a Polish mathematician who is generally considered one of the 20th century's most important and influential mathematicians. He was the founder of modern functional analysis, and an origina ...

and

Hugo Steinhaus Hugo Dyonizy Steinhaus ( ; ; January 14, 1887 – February 25, 1972) was a Polish mathematician and educator. Steinhaus obtained his PhD under David Hilbert at Göttingen University in 1911 and later became a professor at the Jan Kazimierz Un ...

(mathematics) and Stanisław Loria and Wojciech Rubinowicz (physics). After the outbreak of

Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

he continued his studies at the Lwów University, now Ivan Franko National University, until the beginning of the

German occupation of Poland German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...

in 1941. From 1941–1944 he studied at the underground Polish university. After the war he was displaced to

and was employed as assistant at the Faculty of Physics of the Silesian Polytechnics, but continued his studies of physics at the Jagiellonian University under Jan Weyssenhoff and

Konstanty Zakrzewski Konstanty Zakrzewski (14 January 1876 in Warsaw – 19 January 1948 in Kraków) was a Polish physicist. He was a professor of the Jagiellonian University (1911–1913 and since 1917) and professor of the Lviv University (1913–1917), member of ...

. 1945 he moved to the

University of Wrocław , ''Schlesische Friedrich-Wilhelms-Universität zu Breslau'' (before 1945) , free_label = Specialty programs , free = , colors = Blue , website uni.wroc.pl The University of Wrocław ( pl, Uniwersytet Wrocławski, U ...

, where he was employed as assistant of the Theoretical Physics department. 1949 he obtained his doctor’s degree at the

University of Warsaw The University of Warsaw ( pl, Uniwersytet Warszawski, la, Universitas Varsoviensis) is a public university in Warsaw, Poland. Established in 1816, it is the largest institution of higher learning in the country offering 37 different fields of ...

as a pupil of professor Wojciech Rubinowicz. He was nominated 1954 as associate, 1964 as full professor of physical sciences. Since 1954 he was responsible for the organization of the Institute of Low Temperatures of the

Polish Academy of Sciences The Polish Academy of Sciences ( pl, Polska Akademia Nauk, PAN) is a Polish state-sponsored institution of higher learning. Headquartered in Warsaw, it is responsible for spearheading the development of science across the country by a society of ...

Wrocław Wrocław (; , . german: Breslau, , also known by other names) is a city in southwestern Poland and the largest city in the historical region of Silesia. It lies on the banks of the Oder in the Silesian Lowlands of Central Europe, roughly ...

. 1966-1991 he was professor at the

Nicolaus Copernicus University in Toruń Nicolaus Copernicus University in Toruń or NCU ( pl, Uniwersytet Mikołaja Kopernika w Toruniu, UMK) is located in Toruń, Poland. It is named after Nicolaus Copernicus, who was born in Toruń in 1473.Thermodynamics Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed by the four laws o ...

and

Radiation In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: * ''electromagnetic radiation'', such as radio waves, microwaves, infrared, vi ...

Theory, (1969–1986) chief of department of

Theoretical Physics 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 experi ...

and (1986–1991) chief of department of Statistical Physics. He was founder of two scientific journals: ''Reports on Mathematical Physics'' (1970) and ''Open Systems and Information Dynamics'' (1992) noted on the

Institute for Scientific Information The Institute for Scientific Information (ISI) was an academic publishing service, founded by Eugene Garfield in Philadelphia in 1956. ISI offered scientometric and bibliographic database services. Its specialty was citation indexing and analysi ...

Master Journal List. Roman Stanisław Ingarden was an admirer of Japanese culture and language, since 1970s he was lecturer of Japanese language at the Toruń university. 1996 he was nominated

Doctor Honoris Causa An honorary degree is an academic degree for which a university (or other degree-awarding institution) has waived all of the usual requirements. It is also known by the Latin phrases ''honoris causa'' ("for the sake of the honour") or '' ad h ...

of the Toruń University. We wrote numerous scientific papers about

mathematical physics Mathematical physics refers to the development of mathematics, mathematical methods for application to problems in physics. The ''Journal of Mathematical Physics'' defines the field as "the application of mathematics to problems in physics and t ...

, handbooks of

theoretical physics 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 experi ...

and mathematics, as well as works on philosophy and history. Due to his seminal paper "Quantum Information Theory" and later books on this subject R.S. Ingarden, A. Kossakowski and M. Ohya, Information Dynamics and Open Systems. Classical and Quantum Approach, Springer 1997 he is considered as one of the founding fathers of the modern theory of quantum information. Roman Stanisław Ingarden was honoured with Officer's Cross and Knight's Cross of the

Order of Polonia Restituta , image=Polonia Restituta - Commander's Cross pre-1939 w rib.jpg , image_size=200px , caption=Commander's Cross of Polonia Restituta , presenter = the President of Poland , country = , type=Five classes , eligibility=All , awar ...

. In 2002 the

Emperor of Japan The Emperor of Japan is the monarch and the head of the Imperial Family of Japan. Under the Constitution of Japan, he is defined as the symbol of the Japanese state and the unity of the Japanese people, and his position is derived from "the ...

Akihito is a member of the Imperial House of Japan who reigned as the 125th emperor of Japan from 7 January 1989 until his abdication on 30 April 2019. He presided over the Heisei era, ''Heisei'' being an expression of achieving peace worldwide. B ...

honoured him with the 3rd class, Gold Rays with Neck Ribbon

Order of the Sacred Treasure The is a Japanese order, established on 4 January 1888 by Emperor Meiji as the Order of Meiji. Originally awarded in eight classes (from 8th to 1st, in ascending order of importance), since 2003 it has been awarded in six classes, the lowest tw ...

References

Biography (English)Obituary (English)Polish ScienceCopernicus University ToruńSelf-portrait (YouTube)Wrocław University
{{DEFAULTSORT:Ingarden, Roman Stanislaw 20th-century Polish physicists Recipients of the Order of Polonia Restituta (1944–1989) Recipients of the Order of the Sacred Treasure, 3rd class Academic staff of Nicolaus Copernicus University in Toruń 1920 births 2011 deaths Quantum information scientists Burials at Salwator Cemetery