scholarly journals Downward relativistic potential step and phenomenological account of Bohmian trajectories of the Klein paradox

2016 ◽  
Vol 131 (9) ◽  
Author(s):  
M. Razavi ◽  
M. Mollai ◽  
S. Jami ◽  
A. Ahanj
Author(s):  
Constantin Mehmel

AbstractThis paper seeks to develop a phenomenological account of the disorientation of grief, specifically the relationship between disorientation and the breakdown in practical self-understanding at the heart of grief. I argue that this breakdown cannot be sufficiently understood as a breakdown of formerly shared practices and habitual patterns of navigating lived-in space that leaves the bereaved individual at a loss as to how to go on. Examining the experience of losing a loved person and a loved person-to-be, I instead propose that this breakdown should be understood primarily in relation to a distinctive kind of futurity operative in disorientation, irrespective of the extent to which there is a breakdown of formerly shared practices and habitual patterns of navigating lived-in space. Drawing on the resources afforded by Heidegger’s phenomenology, I argue that it is a core characteristic of the experience of disorientation in grief that the grieving person can no longer meaningfully press ahead into a specific futural self. This view comes with certain advantages over existing accounts of the temporality of grief for making sense of the disorientated relationship to futurity, which the appeal to Heideggerian resources makes possible.


2016 ◽  
Vol 31 (02n03) ◽  
pp. 1641031 ◽  
Author(s):  
S. P. Gavrilov ◽  
D. M. Gitman

We consider QED with strong external backgrounds that are concentrated in restricted space areas. The latter backgrounds represent a kind of spatial x-electric potential steps for charged particles. They can create particles from the vacuum, the Klein paradox being closely related to this process. We describe a canonical quantization of the Dirac field with x-electric potential step in terms of adequate in- and out-creation and annihilation operators that allow one to have consistent particle interpretation of the physical system under consideration and develop a nonperturbative (in the external field) technics to calculate scattering, reflection, and electron-positron pair creation. We resume the physical impact of this development.


2006 ◽  
Vol 386 (3) ◽  
pp. 645-651 ◽  
Author(s):  
Seiya Tsujimura ◽  
Shinki Kojima ◽  
Tokuji Ikeda ◽  
Kenji Kano

2010 ◽  
Vol 53 (4) ◽  
pp. 773-778 ◽  
Author(s):  
ZhiPan Li ◽  
Ying Zhang ◽  
Dario Vretenar ◽  
Jie Meng

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