Hamiltonian formulation of curvature squared action
نویسندگان
چکیده
منابع مشابه
Efficient Regularization of Squared Curvature
Curvature has received increased attention as an important alternative to length based regularization in computer vision. In contrast to length, it preserves elongated structures and fine details. Existing approaches are either inefficient, or have low angular resolution and yield results with strong block artifacts. We derive a new model for computing squared curvature based on integral geomet...
متن کاملPositivity of Curvature-Squared Corrections in Gravity.
We study the Gauss-Bonnet (GB) term as the leading higher-curvature correction to pure Einstein gravity. Assuming a tree-level ultraviolet completion free of ghosts or tachyons, we prove that the GB term has a nonnegative coefficient in dimensions greater than 4. Our result follows from unitarity of the spectral representation for a general ultraviolet completion of the GB term.
متن کاملHamiltonian formulation of the D - brane action and the light - cone Hamiltonian
We present the Hamiltonian formulation of the Dirichlet p-brane action. We rewrite the recently proposed quadratic D-brane action in terms of generalized shift vector and lapse function. The first class and the second class constraints are explicitly seperated for the bosonic case. We then impose the gauge conditions in such a way that only time-independent gauge transformations are left. In th...
متن کاملQuantum Feedback Networks: Hamiltonian Formulation
A quantum network is an open system consisting of several component Markovian input-output subsystems interconnected by boson field channels carrying quantum stochastic signals. Generalizing the work of Chebotarev and Gregoratti, we formulate the model description by prescribing the Hamiltonian for the network including details the component systems, the field channels, their interconnections, ...
متن کاملOn Hamiltonian formulation of the Einstein-Hilbert action in two dimensions
Abstract It is shown that the well-known triviality of the Einstein field equations in two dimensions is not a sufficient condition for the Einstein-Hilbert action to be a total divergence, if the general covariance is to be preserved, that is, a coordinate system is not fixed. Consequently, a Hamiltonian formulation is possible without any modification of the two dimensional Einstein-Hilbert a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: General Relativity and Gravitation
سال: 2005
ISSN: 0001-7701,1572-9532
DOI: 10.1007/s10714-005-0173-1