Selected publications

 Author:Title:Abstract:Journal:Full Record: ANDORAND NOT Author:Title:Abstract:Journal:Full Record: ANDORAND NOT Author:Title:Abstract:Journal:Full Record: from to   type ALL researchconferencereviewsbookspopular results per page (117 results)
 61. Artur JandaSpherically Symmetric Solutions of the Einstein--Bach Equations and a Consistent Spin-2 Field Theory Acta Phys. Pol., B , vol. B37/12, pp. 3667-3678 (2006). [abstract] [preprint] [journal] [download] Abstract:We briefly present a relationship between General Relativity coupled to certain spin-0 and spin-2 field theories and higher derivatives metric theories of gravity. In a special case, described by the Einstein--Bach equations, the spin-0 field drops out from the theory and we obtain a consistent spin-two field theory interacting gravitationally, which overcomes a well known inconsistency of the theory for a linear spin-two field coupled to the Einstein's gravity. Then we discuss basic properties of static spherically symmetric solutions of the Einstein--Bach equations. 62. Leszek M. Soko³owski, Andrzej StaruszkiewiczOn the issue of gravitonsClass. Quant. Grav. , vol. 23, pp. 5907-5918 (2006). [abstract] [preprint] [journal] Abstract:We investigate the problem of whether one can anticipate any features of the graviton without a detailed knowledge of a full quantum gravity. Assuming that in linearized gravity the graviton is in a sense similar to the photon, we derive a curious large number coincidence between the number of gravitons emitted by a solar planet during its orbital period and the number of its nucleons. In Einstein's GR the analogy between the graviton and the photon is ill founded. A generic relationship between quanta of a quantum field and plane waves of the corresponding classical field is broken in the case of GR. The graviton cannot be classically approximated by a generic pp wave nor by the exact plane wave. Most important, the ADM energy is a zero frequency characteristic of any asymptotically flat spacetime and this means that any general relationship between energy and frequency is a priori impossible. In particular the formula $E=\hbar \omega$ does not hold. The graviton must have features different from those of the photon and these cannot be predicted from classical general relativity. 63. P. T. Chrusciel, G. M. Greuel, R. Meinel, S. J. SzybkaThe Ernst equation and ergosurfacesClass. Quantum Grav., vol. 23, pp. 4399-4414 (2006). [abstract] [preprint] [journal] Abstract:We show that analytic solutions $\mcE$ of the Ernst equation with non-empty zero-level-set of $\Re \mcE$ lead to smooth ergosurfaces in space-time. In fact, the space-time metric is smooth near a "Ernst ergosurface" $E_f$ if and only if $\mcE$ is smooth near $E_f$ and does not have zeros of infinite order there. 64. Leszek M. Soko³owskiPhysical interpretation and viability of various metric nonlinear gravity theoriesProceedings of MG11 Meeting, Berlin, July 23-29, 2006 (2006). Abstract: 65. Zdzis³aw A. Golda, Andrzej WoszczynaAkustyka wczesnego wszech¶wiata - zwiêz³y przewodnik matematycznyArtyku³ w pracy zbiorowej Wyzwania Racjonalno¶ci, pod redakcj± Stanis³awa Wszo³ka i Roberta Janusza (OBI & WAM, Kraków 2006) ISBN 837318-692-1 [pdf.pl] Abstract: 66. Jacek Guzik, Gary BernsteinInhomogeneous systematic signals in cosmic shear observationsPhys.Rev. D, vol. 72, p. 043503 (2005). [preprint] [journal] Abstract: