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56 papers · 1 filter
Quantum Monte Carlo simulations of a particle in a random potential
Hsuan-Yi Chen, Yadin Y. Goldschmidt
In this paper we carry out Quantum Monte Carlo simulations of a quantum particle in a one-dimensional random potential (plus a fixed harmonic potential) at a finite temperature. Th…
General Relativity in terms of Dirac Eigenvalues
Giovanni Landi, Carlo Rovelli
The eigenvalues of the Dirac operator on a curved spacetime are diffeomorphism-invariant functions of the geometry. They form an infinite set of ``observables'' for general relativ…
Completeness Rules for Spin Observables in Pseudoscalar Meson Photoproduction
Wen-Tai Chiang, Frank Tabakin
The number and type of measurements needed to ascertain the amplitudes for pseudoscalar meson photoproduction are analyzed in this paper. It is found that 8 carefully selected meas…
On the quantization of the Null-Surface formulation of GR
Simonetta Frittelli, Carlos N. Kozameh, Ezra T. Newman +2
We define and discuss various quantum operators that describe the geometry of spacetime in quantum general relativity. These are obtained by combining the Null-Surface Formulation…
Exclusive diffractive processes and the quark substructure of mesons
M. A. Pichowsky, T. -S. H. Lee
Exclusive diffractive processes on the nucleon are investigated within a model in which the quark-nucleon interaction is mediated by Pomeron exchange and the quark substructure of…
``Sum over Surfaces'' form of Loop Quantum Gravity
Michael P Reisenberger, Carlo Rovelli
We derive a spacetime formulation of quantum general relativity from (hamiltonian) loop quantum gravity. In particular, we study the quantum propagator that evolves the 3-geometry…