Kavli Affiliate: Wayne Hu | First 5 Authors: Wayne Hu, , , , | Summary: We develop and examine the principles governing the formation of distortions in the cosmic microwave background. Distortions in the frequency or spectral distribution of the background probe the thermal history of the universe whereas those in the angular temperature distribution […]
Kavli Affiliate: Robert Rosner | First 5 Authors: Eun-jin Kim, Angela Olinto, Robert Rosner, , | Summary: We study the generation and evolution of density perturbations and peculiar velocities due to primordial magnetic fields. We assume that a random magnetic field was present before recombination and follow the field’s effect on the baryon fluid starting […]
Kavli Affiliate: Salman Habib | First 5 Authors: Salman Habib, , , , | Summary: Some recent investigations of the thermal equilibrium properties of kinks in a $1+1$-dimensional, classical $Φ^4$ field theory are reviewed. The distribution function, kink density, correlation function, and certain thermodynamic quantities were studied both theoretically and via large scale simulations. A […]
Kavli Affiliate: Salman Habib | First 5 Authors: Salman Habib, , , , | Summary: We consider a simple quantum system subjected to a classical random force. Under certain conditions it is shown that the noise-averaged Wigner function of the system follows an integro-differential stochastic Liouville equation. In the simple case of polynomial noise-couplings this […]
Kavli Affiliate: Joshua A. Frieman | First 5 Authors: Joshua A. Frieman, Román Scoccimarro, , , | Summary: We study the prospects for the current microlensing searches, which have recently discovered several candidates, to yield useful information about the flattening of the Galaxy dark matter halo. Models of HI warps and N-body simulations of galaxy […]
Kavli Affiliate: Robert Wald | First 5 Authors: Robert M. Wald, , , , | Summary: We consider a general, classical theory of gravity in $n$ dimensions, arising from a diffeomorphism invariant Lagrangian. In any such theory, to each vector field, $ξ^a$, on spacetime one can associate a local symmetry and, hence, a Noether current […]
Kavli Affiliate: Robert Wald | First 5 Authors: Robert M. Wald, , , , | Summary: A simple proof of a strengthened form of the first law of black hole mechanics is presented. The proof is based directly upon the Hamiltonian formulation of general relativity, and it shows that the the first law variational formula […]