5 papers
A discrete series gauge field at the late-time boundary of
Manizheh Botshekananfard, Elif BüÅra Güraksın, Vasileios A. Letsios +1
We study the free Maxwell field on the planar patch of four-dimensional de Sitter spacetime (). We review its bulk canonical quantization in the Bunch-Davies vacuum, and we g…
Generalized Fock--Lorentz Transformations from Projective Conformal Coordinates: Covariant Structure, Sector Classification, and Oscillator Limits
Abdelmalek Boumali, N. Jafari, M. Botshekananfard
We develop a covariant projective formulation of generalized Fock--Lorentz (GFL) transformations based on the auxiliary Minkowski coordinates , where …
Induced energy-momentum tensor of the scalar field in 3D de Sitter QED
Manizheh Botshekananfard, Takahiro Hayashinaka
In this work, we derive the renormalized expectation value of the energy--momentum tensor of a quantized charged scalar field in three-dimensional de Sitter spacetime $\mathrm{dS}_…
Klein--Gordon and Dirac Oscillators with an Apparent Mass Induced by the Momentum-Space Dual of the Fock--Lorentz Transformations
Abdelmalek Boumali, N. Jafari, Manizheh Botshekananfard
We propose a controlled momentum-space dual of the Fock--Lorentz (FL) transformations and use it to derive a deformed relativistic mass shell. Restricting the FL conformal factor t…
Ladder operators of the de Sitter algebra
Manizheh Botshekananfard, Elif BüÅra Güraksın, Gizem Åengör
We identify raising and lowering operators of the de Sitter algebra with focus on their action on states in particular in 4 spacetime dimensions. There isn't a unique solution to t…