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Säkerhetsdagen 2014   Martin Löwdin
Säkerhetsdagen 2014 Martin Löwdin
Published: 2014/09/12
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Be who you are -- Whatever that is | Angelica Löwdin | TEDxGöteborg
Be who you are -- Whatever that is | Angelica Löwdin | TEDxGöteborg
Published: 2015/01/19
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Advances in Quantum Chemistry Volume 41 A tribute to the life and work of Per Olov Lowdin
Advances in Quantum Chemistry Volume 41 A tribute to the life and work of Per Olov Lowdin
Published: 2016/10/14
Channel: Clementina
Gal 1:10-24 - Tre sanningar om evangeliet
Gal 1:10-24 - Tre sanningar om evangeliet
Published: 2017/09/18
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Quantum life - how physics can revolutionise biology: Jim Al-Khalili at TEDxHuddersfield
Quantum life - how physics can revolutionise biology: Jim Al-Khalili at TEDxHuddersfield
Published: 2012/11/07
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Pass 2 : Människans syndaskuld (Evangelisationskonferens 22 nov 2014)
Pass 2 : Människans syndaskuld (Evangelisationskonferens 22 nov 2014)
Published: 2014/12/05
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Quantum Life: How Physics Can Revolutionise Biology: Jim Al-Khalili at TEDxSalford
Quantum Life: How Physics Can Revolutionise Biology: Jim Al-Khalili at TEDxSalford
Published: 2012/12/29
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mozart harp and flute concerto,1st movement, WAAPA
mozart harp and flute concerto,1st movement, WAAPA
Published: 2008/11/14
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Fundamental World of Quantum Chemistry A Tribute to the Memory of Per Olov Lwdin Volume III
Fundamental World of Quantum Chemistry A Tribute to the Memory of Per Olov Lwdin Volume III
Published: 2016/10/15
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Quantum tunnelling
Quantum tunnelling
Published: 2014/11/06
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Advances in Quantum Chemistry Volume 39
Advances in Quantum Chemistry Volume 39
Published: 2016/10/14
Channel: Clementina
World Of Warcraft Legendary Cloak Chapter 5 Part 2/3
World Of Warcraft Legendary Cloak Chapter 5 Part 2/3
Published: 2014/06/11
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World Of Warcraft Legendary Cloak Chapter 5 Part 3/3
World Of Warcraft Legendary Cloak Chapter 5 Part 3/3
Published: 2014/06/11
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World Of Warcraft Legendary Cloak Chapter 5 Part 1/3
World Of Warcraft Legendary Cloak Chapter 5 Part 1/3
Published: 2014/06/11
Channel: LeagueOF Zoro
Advances in Quantum Chemistry Volume 38
Advances in Quantum Chemistry Volume 38
Published: 2016/10/14
Channel: Clementina
Hans G. Feichtinger: Mathematical and numerical aspects of frame theory - Part 2
Hans G. Feichtinger: Mathematical and numerical aspects of frame theory - Part 2
Published: 2015/08/10
Channel: Centre International de Rencontres Mathématiques
Advances in Quantum Chemistry Volume 40
Advances in Quantum Chemistry Volume 40
Published: 2016/10/14
Channel: Clementina
Advances in Quantum Chemistry Volume 36 Thematic title From Electronic Structure to Time Dependent P
Advances in Quantum Chemistry Volume 36 Thematic title From Electronic Structure to Time Dependent P
Published: 2016/10/14
Channel: Clementina
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WIKIPEDIA ARTICLE

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Per-Olov Löwdin
Born (1916-10-28)October 28, 1916
Uppsala, Sweden
Died October 6, 2000(2000-10-06) (aged 83)
Uppsala, Sweden
Residence  Sweden  United States
Nationality Swedish
Alma mater Uppsala University
Known for Molecular orbital calculations
Quantum chemistry
Perturbation theory
Awards Niels Bohr Medal (1987)
Scientific career
Fields Physicist
Institutions University of Uppsala
University of Florida
Doctoral advisor Ivar Waller

Per-Olov Löwdin (October 28, 1916 – October 6, 2000) was a Swedish physicist, professor at the University of Uppsala from 1960 to 1983, and in parallel at the University of Florida until 1993.

A former graduate student under Ivar Waller, Löwdin formulated in 1950 the symmetric orthogonalization scheme for molecular orbital calculations. This scheme is the basis of the zero-differential overlap (ZDO) approximation used in semiempirical theories.

He is also credited with the use of fat symbols for matrices, making easy the derivation of several theorems of quantum mechanics.

The famous 'Löwdin's pairing theorem' used in ROHF, UHF and RES-GVB theories is not his. According to himself, George G. Hall and King made the formal proposition after an informal suggestion by Löwdin.

His partitioning technique for quantum chemistry problems is best appreciated through the series of 14 papers on perturbation theory published between 1963 and 1971.

He was also a very active teacher, starting the Summer Schools of Quantum Chemistry at Uppsala around 1958. In 1959 and 1960, Löwdin started the Quantum Theory Project at the University of Florida as a sister project to the Uppsala Quantum Chemistry Group. In 1964 he was joined by John C. Slater from MIT. The International Winter Institutes (held initially at Sanibel Island, and later at Gainesville) provided the initiation of hundreds of Latin American young scientists during the eighties and nineties. In 1960 he founded the Sanibel Symposium in conjunction with the Winter Institute. They have been held every year since 1960.

Löwdin was elected a member of the Royal Swedish Academy of Sciences in 1969 and was a member of the committee for the Nobel Prize in Physics from 1972 to 1984. He was the founder of the International Journal of Quantum Chemistry and of the series Advances in Quantum Chemistry. He was a foundation member of the International Academy of Quantum Molecular Science.

Publications[edit]

Publications

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