scholarly journals Classical and quantum mechanical motion in magnetic fields

2016 ◽  
Vol 84 (4) ◽  
pp. 263-269 ◽  
Author(s):  
J. Franklin ◽  
K. Cole Newton
Keyword(s):  
Magnetic Fields ◽  
Quantum Mechanical ◽  
Mechanical Motion

Quantum mechanical aspects of the effects of weak magnetic fields on biological objects

BIOPHYSICS ◽  
2010 ◽  
Vol 55 (4) ◽  
pp. 652-660 ◽  
Author(s):  
A. V. Drozdov ◽  
T. P. Nagorskaya ◽  
S. V. Masyukevich ◽  
E. S. Gorshkov
Keyword(s):  
Magnetic Fields ◽  
Quantum Mechanical ◽  
Biological Objects ◽  
Weak Magnetic Fields

Endless skies and open seas – how birds and fish navigate

Neuroforum ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lisa Spiecker ◽  
Bo Leberecht ◽  
Corinna Langebrake ◽  
Malien Laurien ◽  
Shambhavi Rajendra Apte ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnetic Fields ◽  
Home Range ◽  
Environmental Conditions ◽  
Geomagnetic Field ◽  
Visual Cues ◽  
Quantum Mechanical ◽  
The Sun ◽  
Seasonal Migrations ◽  
Research Questions

Abstract Every year, billions of animals leave their home range and start seasonal migrations in order to find more favorable resources and to escape harsh environmental conditions. These round trips often span thousands of kilometers. To successfully navigate along their route, animals rely on various external references. While landmarks and celestial cues like stars or the sun are easy to imagine as guidance on these journeys, using the geomagnetic field for orientation is more elusive. The geomagnetic field is an omnipresent cue, which can be sensed and relied upon by many animals, even when visual cues are sparse. How magnetic fields can be perceived seems to vary between birds and fish. While birds seem to use a mechanism based on the quantum mechanical properties of electron spins, fish may have evolved a compass similar in its function to the technical devises developed by humans. How these mechanisms work precisely and how they are integrated are research questions addressed in SFB 1372.

The Effect of Weak Permanent Magnetic Fields on the Electric Properties of Lipid-Bilayers

1995 ◽  
Vol 50 (11-12) ◽  
pp. 833-839 ◽  
Author(s):  
Alexander Pazur
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Chlorophyll A ◽  
Lipid Bilayers ◽  
Lipid Membranes ◽  
Quantum Mechanical ◽  
Leakage Currents ◽  
Black Lipid Membranes ◽  
External Static Magnetic Field ◽  
Membrane Location

Abstract Black lipid membranes were prepared on a Teflon septum separating electrically the two chambers of a Teflon cuvette, using the technique of Mueller et al., (Nature 194. 979 (1962)). An external, static magnetic field was applied, whose intensity varied from 0 G to 100 G at the membrane location. Field applications higher than 10 G are effecting higher leakage currents, increased capacity and faster breakdown of the bilayer state, as compared to the absence of a magnetic field. If bilayers were doped with chlorophyll a, these effects were increased. Quantum mechanical and thermodynamical phenomena on membranes will be discussed as possible origins of these effects.

Quantum-mechanical motion of Gaussian wave packets on elliptical and hyperbolic Kepler orbits in the Coulomb field

1993 ◽  
Vol 48 (4) ◽  
pp. 2574-2585 ◽  
Author(s):  
S. D. Boris ◽  
S. Brandt ◽  
H. D. Dahmen ◽  
T. Stroh ◽  
M. L. Larsen
Keyword(s):  
Wave Packets ◽  
Coulomb Field ◽  
Quantum Mechanical ◽  
Mechanical Motion ◽  
Gaussian Wave Packets

scholarly journals e+e− Annihilation in Strong Magnetic Fields

1981 ◽  
Vol 95 ◽  
pp. 35-36
Author(s):  
G. Wunner ◽  
H. Herold ◽  
H. Ruder
Keyword(s):  
Magnetic Fields ◽  
Excited States ◽  
Quantum Mechanical ◽  
Annihilation Process ◽  
Strong Magnetic Fields ◽  
Two Body Problem ◽  
Quantum Mechanical Treatment ◽  
Electron Positron ◽  
Correct Quantum ◽  
Free Case

The possible existence of electron-positron plasmas in the magnetosphere of neutron stars gives rise to the question in which way the e+e− annihilation process is modified by the strong magnetic fields prevailing there. On the basis of a correct quantum mechanical treatment of the two-body problem in an external magnetic field we have calculated lifetimes of the ground state as well as of excited states of bound e+e− pairs (positronium). We find that the 1γ decay remains strictly forbidden, whereas the 2γ process is strongly enhanced with respect to the field-free case.

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