Quantum Information Seminar Series: Ramis Movassagh
- Date: 12/22/2011
- Time: 15:00
Lecturer(s):
Ramis Movassagh
Location:
University of Calgary
Topic:
Density of States of Quantum Spin Systems
Description:
Abstract:
We propose a method which we call "Isotropic Entanglement"
(IE), that predicts the eigenvalue distribution of quantum many body
(spin) systems (QMBS) with generic interactions. We interpolate between
two known approximations by matching fourth moments. Though, such
problems can be QMA-complete, our examples show that IE provides an
accurate picture of the spectra well beyond what one expects from the
first four moments alone. We further show that the interpolation is
universal, i.e., independent of the choice of local terms.
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