Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Fursaev, Dmitri"'
Autor:
Fursaev, Dmitri V.
An introduction to generalized thermodynamics of quantum black holes, in the one-loop approximation, is given. The material is aimed at graduate students. The topics include: quantum evaporation of black holes, Euclidean formulation of quantum theory
Externí odkaz:
http://arxiv.org/abs/2210.06081
Autor:
Fursaev, Dmitri
Publikováno v:
Phys. Rev. D 103, 123526 (2021)
An optical equation for null strings is derived. The equation is similar to Sachs' optical equations for null geodesic congruences. The string optical equation is given in terms of a single complex scalar function $Z$, which is a combination of spin
Externí odkaz:
http://arxiv.org/abs/2104.04982
Autor:
Fursaev, Dmitri V.
A class of curved spacetimes with global parabolic isometries (GPI) is introduced. These isometries have fixed point sets on two-dimensional null surfaces which can be interpreted as worldsheets of massless cosmic strings. Back reaction effects of th
Externí odkaz:
http://arxiv.org/abs/2001.03770
Autor:
Fursaev, Dmitri V.
Publikováno v:
Phys. Rev. D 98, 123531 (2018)
Circular massless cosmic strings which move with the speed of light in the de Sitter universe are described. Construction of the background geometry is based on parabolic isometries of the de Sitter spacetime. Microscopic circular cosmic strings may
Externí odkaz:
http://arxiv.org/abs/1811.01563
Autor:
Andrei, Natan, Bissi, Agnese, Buican, Matthew, Cardy, John, Dorey, Patrick, Drukker, Nadav, Erdmenger, Johanna, Friedan, Daniel, Fursaev, Dmitri, Konechny, Anatoly, Kristjansen, Charlotte, Makabe, Isao, Nakayama, Yu, O'Bannon, Andy, Parini, Robert, Robinson, Brandon, Ryu, Shinsei, Schmidt-Colinet, Cornelius, Schomerus, Volker, Schweigert, Christoph, Watts, Gerard
Proceedings of the workshop "Boundary and Defect Conformal Field Theory: Open Problems and Applications," Chicheley Hall, Buckinghamshire, UK, 7-8 Sept. 2017.
Comment: Conference proceedings of "Boundary and Defect Conformal Field Theory: Open P
Comment: Conference proceedings of "Boundary and Defect Conformal Field Theory: Open P
Externí odkaz:
http://arxiv.org/abs/1810.05697
Publikováno v:
Phys. Rev. D 95, 106013 (2017)
When a spacetime has boundaries, the entangling surface does not have to be necessarily compact and it may have boundaries as well. Then there appear a new, boundary, contribution to the entanglement entropy due to the intersection of the entangling
Externí odkaz:
http://arxiv.org/abs/1703.04186
Publikováno v:
Phys. Rev. D 93, 084021 (2016)
A relation between the conformal anomaly and the logarithmic term in the entanglement entropy is known to exist for CFT's in even dimensions. In odd dimensions the local anomaly and the logarithmic term in the entropy are absent. As was observed rece
Externí odkaz:
http://arxiv.org/abs/1601.06418
Autor:
Fursaev, Dmitri
The trace anomaly of conformal field theories in four dimensions is characterized by '$a$' and '$c$'-functions. The scaling properties of the effective action of a CFT in the presence of boundaries is shown to be determined by $a$, $c$ and two new fu
Externí odkaz:
http://arxiv.org/abs/1510.01427
Autor:
Fursaev, Dmitri
Publikováno v:
Bulletin MSRU, v.1 (2014) 1-9
An alternative derivation of generalized gravitational entropy associated to co-dimension 2 'entangling' hypersurfaces is given. The approach is similar to the Jacobson-Myers 'Hamiltonian' method and it does not require computations on manifolds with
Externí odkaz:
http://arxiv.org/abs/1406.5635