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Personalbild Per-Olof Westlund

Per-Olof Westlund

Main interest: To understand the description of open QM systems. To use  the Stochastic Liouville Equation in Theoretical and Physical Chemistry describing relaxation in NMR-spectroscopy.

Verksam vid

Anknytning
Anknuten som professor emeritus till Kemiska institutionen
Plats
KB.A4, Linnaeus väg 10 Umeå universitet, 901 87 Umeå

Per-Olof Westlund: Analysis of disentanglement in open QM systems and the use of SLE in chemistry.
The Stochastic Liouville Equation SLE: the starting point of choice for analysis of open QM systems in the semi-classical approach.
SLE treats the impact of a classical system on a QM subsystem when studied by different spectroscopic methods such as NMR ,EPR or fluorescence. 

Below three ongoing projects 2020
1.The interpretation of the famous Stern-Gerlach experiment and its use in the Einstein-Podolsky-Rosen(EPR) paradox reformulated by D. Bohm. 

My understanding and conclusion about this thought experiment is based on our four papers[2012,2013,2017,2019] together with H. Wennerström).
The spin states of particle A or B in the EPR-B thought experiment cannot be measured by a Stern-Gerlach device as long as the two spin particles is forming a singlet state. Both A and B will go straight through the S-G device [2019].  On the other hand if we assume that for instance particle A is passing through a S-G device in either a spin up or spin down path, the singlet state must have been destroyed. A single spin particle passing through a S-G magnet is taking spin "up" path or spin "down" path due to the effect of other degrees of freedom(electron spin-translational)[2012,2017], and these coupling cause relaxation and that a spin particle ends up in either "up" or "down" position (no collapse of the wavefunction but spin relaxation)[2012]The disentanglement (killing the singlet state) we think can be due to the field gradients outside the magnet  which connect to the translational degrees of freedom of particle A or B. Thus "no spooky force at long distance exists" and Bells theorem is not violated in this EPR-B thought experiment [2013,2019].

2.The motion of water( or biomolecules) in micro-heterogenous systems and its influence on their NMR line-shape and T1 relaxation.
3. A meta-theory of Natural Science and the Ethics of Natural Science.

A. What is natural science and what is not depends on a decision by the scientific community and the editors of scientifc journals. Consequently therie is  no "objective" criterion (however, still not subjective) what is science and what is not.
B. One should formulate an ethical guide  which is helpful in evaluating scientist productivity. The publishing norms so far published ignore to evaluate the individual contributions  in multi author papers. This leads to unethical publishing practices .

Molecular Physics, Taylor & Francis 2020, Vol. 118, (17)
Goesweiner, Christian; Westlund, Per-Olof; Scharfetter, Hermann
Molecular Physics, Taylor & Francis 2020, Vol. 118, (6)
Shamshir, Adel; Sparrman, Tobias; Westlund, Per-Olof
Environmental Science and Technology, American Chemical Society (ACS) 2019, Vol. 53, (23) : 13757-13766
Skrobonja, Aleksandra; Gojkovic, Zivan; Soerensen, Anne L.; et al.
Molecular Physics, Taylor & Francis 2019, Vol. 117, (7-8) : 960-967
Westlund, Per-Olof
Journal of Modern Physics, Vol. 10, (10) : 1247-1254
Westlund, Per-Olof; Wennerström, Håkan
Physical Review X, American Physical Society 2018, Vol. 8, (2)
Gösweiner, Christian; Lantto, Perttu; Fischer, Roland; et al.
Physical Chemistry, Chemical Physics - PCCP, Vol. 19, (7) : 4975-4988
Driver, Gordon W.; Huang, Yang; Laaksonen, Aatto; et al.
Nanocelluloses: their preparation, properties, and applications, American Chemical Society (ACS) 2017 : 91-112
Larsson, Per Tomas; Karlsson, Rose-Marie Pernilla; Westlund, Per-Olof; et al.
Entropy, Basel: MDPI 2017, Vol. 19, (5)
Wennerström, Håkan; Westlund, Per-Olof
Universal Journal of Chemistry, Vol. 4, (2) : 69-73
Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, Royal Society of Chemistry 2014, (16) : 11924-11935
Han, Guangye; Huang, Yang; Koua, Faisal Hammad Mekky; et al.
Physical Chemistry, Chemical Physics - PCCP, RSC Publishing 2013, Vol. 15, (33) : 14089-14097
Huang, Yang; Nam, Kwangho; Westlund, Per-Olof
Physics essays, Ottawa: Physics Essays Publication 2013, Vol. 26, (2) : 174-180
Wennerström, Håkan; Westlund, Per-Olof
Cellulose, Springer Science+Business Media B.V. 2012, Vol. 19, (1) : 1-12
Bergenstråhle-Wohlert, Malin; Berglund, Lars A; Brady, John W; et al.
Environmental Science and Technology, American Chemical Society (ACS) 2012, Vol. 46, (21) : 11653-11659
Jonsson, Sofi; Skyllberg, Ulf; Nilsson, Mats B; et al.
Advances in Chemistry Research: Volume 11
Lindgren, Matteus; Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, RSC Publishing 2012, Vol. 14 : 1677-1684
Wennerström, Håkan; Westlund, Per-Olof
The Journal of Physical Chemistry C, American Chemical Society (ACS) 2011, Vol. 115, (13) : 5469-5477
Gustafsson, Håkan; Ahrén, Maria; Söderlind, Fredrik; et al.
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, Elsevier 2010, Vol. 75, (3) : 953-9
Lindgren, Matteus; Sparrman, Tobias; Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, Cambridge: RSC publishing 2010, Vol. 12, (32) : 9358-9366
Lindgren, Matteus; Westlund, Per-Olof
Biophysical Chemistry, Vol. 151, (1-2) : 46-53
Lindgren, Matteus; Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, Vol. 12, (13) : 3136-40
Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, Vol. 12, (1) : 201-206
Westlund, Per-Olof; Wennerström, Håkan
Physical Chemistry, Chemical Physics - PCCP, Royal Society of Chemistry 2009, Vol. 11 : 10368-76
Lindgren, Matteus; Laaksonen, Aatto; Westlund, Per-Olof
Journal of Fluorescence, Springer 2009, Vol. 19, (5) : 837-845
Norlin, Nils; Westlund, Per-Olof; Johansson, Lennart B-Å
Molecular Physics, Taylor & Francis 2009, Vol. 107, (20) : 2141-8
Westlund, Per-Olof
Journal of Chemical Physics, American Institute of Physics (AIP) 2008, Vol. 128, (5)
Belorizky, Elie; Fries, Pascal H; Helm, Lothar; et al.
Journal of magnetic resonance, Vol. 195, (1) : 103-11
Kowalewski, J; Egorov, A; Kruk, D; et al.
Physical Chemistry, Chemical Physics - PCCP, Vol. 10 : 6962-70
Norlin, Nils; Håkansson, Per; Westlund, Per-Olof; et al.
Physical Chemistry, Chemical Physics - PCCP, Vol. 9 : 1941-51
Isaksson, Mikael; Norlin, Nils; Westlund, Per-Olof; et al.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Vol. 62, (1-3) : 539-46
Larsson, Per Tomas; Westlund, Per-Olof
PHYSICAL REVIEW A, Vol. A 71, (062106) : 1-5
Westlund, Per-Olof; Wennerstrom, H.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Vol. 62, (1-3) : 335-42
Zhou, Xiangzhi; Westlund, Per-Olof
Journal of magnetic resonance, San Diego: Academic Press 2005, Vol. 173, (1) : 75-83
Zhou, Xiangzhi; Westlund, Per-Olof
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, Elsevier 2005, Vol. 62, (1-3) : 335-342
Zhou, Xiangzhi; Westlund, Per-Olof
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, Elsevier 2005, Vol. 62, (1-3) : 76-82
Zhou, Xiangzhi; Westlund, Per-Olof
Physical Chemistry, Chemical Physics - PCCP, Royal Society of Chemistry 2005, Vol. 7, (7) : 1394-1401
Åman, Ken; Håkansson, Pär; Westlund, Per-Olof
Journal of Physical Chemistry B, Vol. 108, (44) : 17243-17250
Håkansson, Pär; Isaksson, Mikael; Westlund, Per-Olof; et al.
The Journal of Chemical Physics, Vol. 121, (5) : 2215-27
Kruk, Danuta; Kowalewski, Jozef; Westlund, Per-Olof
Journal of magnetic resonance, San Diego: Academic Press 2004, Vol. 167, (1) : 147-160
Zhou, Xiangzhi; Caravan, Peter; Clarkson, R B; et al.
Molecular Physics, London: Taylor and Francis Ltd 2004, Vol. 102, (9-10) : 1085-1093
Åman, Ken; Westlund, Per-Olof
Physical Chemistry Chemical Physics, Vol. 5 : 2114-21
Sparrman, Tobias; Westlund, Per-Olof
Biophysical Journal, Vol. 84 : 102-15
Åman, Ken; Lindahl, Erik; Edholm, Olle; et al.
The Journal of Chemical Physics, Vol. 117, (19) : 8634-43
Håkansson, P; Persson, L; Westlund, Per-Olof
Journal of Mathematical Chemistry, New York: Kluwer Academic Publishers 2002, Vol. 31, (1) : 65-89
Persson, Leif; Cegrell, Urban; Usova, N; et al.

Lite hjälp och diskussion för  Meta-naturvetenskap och etik i två masterkurser.