Auflistung Forschungsinitiativen nach Titel

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  • Liouville description of conical defects in dS4, Gibbons-Hawking entropy as modular entropy, and dS3 holography 
    Arias, Cesar; Diaz, Felipe; Olea, Rodrigo; Sundell, Per (Berlin ; Heidelberg : Springer, 2020)
    We model the back-reaction of a static observer in four-dimensional de Sitter spacetime by means of a singular ℤq quotient. The set of fixed points of the ℤq action consists of a pair of codimension two minimal surfaces ...
  • A low-energy limit of Yang-Mills theory on de Sitter space 
    Cork, Josh; Kutluk, Emine Şeyma; Lechtenfeld, Olaf; Popov, Alexander D. (Berlin ; Heidelberg : Springer, 2021)
    We consider Yang-Mills theory with a compact structure group G on four-dimensional de Sitter space dS4. Using conformal invariance, we transform the theory from dS4 to the finite cylinder I × S3, where I = (−π/2, π/2) and ...
  • Non-unitary evolution in the general extended EFT of inflation & excited initial states 
    Ashoorioon, Amjad (Berlin : Springer, 2018)
    I study the general case that arises in the Extended Effective Field Theory of Inflation (gEEFToI), in which the coefficients of the sixth order polynomial dispersion relation depend on the physical wavelength of the ...
  • On black hole temperature in Horndeski gravity 
    Hajian, K.; Liberati, S.; Sheikh-Jabbari, M.M.; Vahidinia, M.H. (Amsterdam [u.a.] : Elsevier, 2020)
    It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories ...
  • On N=2 supersymmetric Ruijsenaars–Schneider models 
    Krivonos, Sergey; Lechtenfeld, Olaf (Amsterdam : North-Holland Publ., 2020)
    We construct an N=2 supersymmetric extension of n-particle Ruijsenaars–Schneider models. The guiding feature is a deformation of the phase space. The supercharges have a “free” form linear in the fermions but produce an ...
  • A perturbative expansion scheme for supermembrane and matrix theory 
    Lechtenfeld, Olaf; Nicolai, Hermann (Berlin, Heidelberg : Springer, 2022)
    We reconsider the supermembrane in a Minkowski background and in the light-cone gauge as a one-dimensional gauge theory of area preserving diffeomorphisms (APDs). Keeping the membrane tension T as an independent parameter ...
  • Perturbative linearization of supersymmetric Yang-Mills theory 
    Ananth, Sudarshan; Lechtenfeld, Olaf; Malcha, Hannes; Nicolai, Hermann; Pandey, Chetan; Pant, Saurabh (Berlin [u.a.] : Springer, 2020)
    Supersymmetric gauge theories are characterized by the existence of a transformation of the bosonic fields (Nicolai map) such that the Jacobi determinant of the transformation equals the product of the Matthews-Salam-Seiler ...
  • Sustainability transitions and the spatial interface: Developing conceptual perspectives 
    Levin-Keitel, Meike; Mölders, Tanja; Othengrafen, Frank; Ibendorf, Jens (Basel : MDPI AG, 2018)
    Sustainability transitions research lacks a crucial perspective: the spatial dimension. The interrelations between space and sustainability transition processes are thus underexposed. The spatial dimension is, of course, ...
  • Universal form of the Nicolai map 
    Lechtenfeld, Olaf; Rupprecht, Maximilian (Ridge, NY : American Physical Society, 2021)
    The nonlocal bosonic theory obtained from integrating out all anticommuting and auxiliary variables in a globally supersymmetric theory is characterized by the Nicolai map. The latter is generated by a coupling flow ...
  • Yang–Mills solutions on Minkowski space via non-compact coset spaces 
    Kumar, Kaushlendra; Lechtenfeld, Olaf; Picanço Costa, Gabriel; Röhrig, Jona (Amsterdam : North-Holland Publ., 2022)
    We find a two-parameter family of solutions of the Yang–Mills equations for gauge group SO(1,3) on Minkowski space by foliating different parts of it with non-compact coset spaces with SO(1,3) isometry. The interior of the ...

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