11 research outputs found
Casimir effect for scalar fields with Robin boundary conditions in Schwarzschild background
The stress tensor of a massless scalar field satisfying Robin boundary
conditions on two one-dimensional wall in two-dimensional Schwarzschild
background is calculated. We show that vacuum expectation value of stress
tensor can be obtained explicitly by Casimir effect, trace anomaly and Hawking
radiation.Comment: 10 pages, no figure
Trace Anomaly and Backreaction of the Dynamical Casimir Effect
The Casimir energy for massless scalar field which satisfies priodic boundary
conditions in two-dimensional domain wall background is calculated by making
use of general properties of renormalized stress-tensor. The line element of
domain wall is time dependent, the trace anomaly which is the nonvanishing
for a conformally invariant field after renormalization,
represent the back reaction of the dynamical Casimir effect.Comment: 8 pages, no figures, typos corrected, discussion added, has been
accepted for the publication in GR
Method to compute the stress-energy tensor for the massless spin 1/2 field in a general static spherically symmetric spacetime
A method for computing the stress-energy tensor for the quantized, massless,
spin 1/2 field in a general static spherically symmetric spacetime is
presented. The field can be in a zero temperature state or a non-zero
temperature thermal state. An expression for the full renormalized
stress-energy tensor is derived. It consists of a sum of two tensors both of
which are conserved. One tensor is written in terms of the modes of the
quantized field and has zero trace. In most cases it must be computed
numerically. The other tensor does not explicitly depend on the modes and has a
trace equal to the trace anomaly. It can be used as an analytic approximation
for the stress-energy tensor and is equivalent to other approximations that
have been made for the stress-energy tensor of the massless spin 1/2 field in
static spherically symmetric spacetimes.Comment: 34 pages, no figure
Special Relativity as a Step in the Development of the Quantum Programme: Revolution in a Revolution
Knowledge,Values and Ideologies in Developing on Modern Lines Society: Interdisciplinary Approach
It is contended that to construct a social theory capable to comprehend the Russian Modernization one has to broaden first and foremost the conceptual basis of research. The basic element lacking in the orthodox Marxist conceptual scheme is the notion of âsocial unconsciousnessâ. It is demonstrated that Slavoj Zizekâs works represent the most ingenious fusion of post-structuralism, psychoanalysis and Marxism that treats the ability to disclose social contradictions. It is shown that the adequate comprehension of social contradictions system is possible in the light of ideologies grounded on social equality values . They can reveal the main contradiction of Russian social life, i.e. the contradiction between Empire Ambitions of Russian bureaucracy and the interests and values of the ill-structured Civil Society.
Key words : ideologies, psychoanalysis, post-structuralism, S. Zizek, social contradictions