Phase-space methods for the spin dynamics in condensed matter systems

Can spin-polarized photoemission measure spin properties in condensed matter?

Photoemitted electrons move in a vacuum; their quantum state can be completely characterized in terms of energy, momentum and spin polarization by spin-polarized photoemission experiments. A review article in this issue by Heinzmann and Dil (2012 J. Phys.: Condens. Matter 24 173001) considers whether the measured spin properties, i.e. the magnitude and direction of the spin polarization vector,...

Condensed Matter Physics Semiconductor Spin Qubits

Meanwhile, a number of algorithms that could be run efficiently on quantum computers, but not on classical computers have been discovered, thereby increasing demand. The challenges are high: computers will need thousands of qubits (the quantum analog of a bit) and computational error rates of at most about one percent to perform effective quantum algorithms — a scaling of several orders of magn...

Computational Methods for the Measurement of Entanglement in Condensed Matter Systems

At the interface of quantum information and condensed matter physics, the study of entanglement in quantum many-body systems requires a new toolset which combines concepts from each. This thesis introduces a set of computational methods to study phases and phase transitions in lattice models of quantum systems, using the Renyi entropies as a means of quantifying entanglement. The scaling of ent...

Bosonization and Duality in Condensed Matter Systems

We show that abelian bosonization of 1+1 dimensional fermion systems can be interpreted as duality transformation and, as a conseguence, it can be generalized to arbitrary dimensions in terms of gauge forms of rank d − 1, where d is the dimension of the space. This permit to treat condensed matter systems in d > 1 as gauge theories. Furthermore we show that in the “scaling” limit the bosonized ...

T Opological Phases in Condensed Matter Systems