86 citations · 190 across the 7 of their papers we have counts for
7 papers
Geometric Phases and Critical Phenomena in a Chain of Interacting Spins
M. E. Reuter, M. J. Hartmann, M. B. Plenio
The geometric phase can act as a signature for critical regions of interacting spin chains in the limit where the corresponding circuit in parameter space is shrunk to a point and…
Excitation and Entanglement Transfer Near Quantum Critical Points
Michael J. Hartmann, Moritz E. Reuter, Martin B. Plenio
Recently, there has been growing interest in employing condensed matter systems such as quantum spin or harmonic chains as quantum channels for short distance communication. Many p…
Excitation and Entanglement Transfer Versus Spectral Gap
Michael J. Hartmann, Moritz E. Reuter, Martin B. Plenio
We consider quantum many body systems as quantum channels and study the relation between the transfer quality and the size of the spectral gap between the system's ground and excit…
Quantum information and triangular optical lattices
Alastair Kay, Derek K. K. Lee, Jiannis K. Pachos +3
The regular structures obtained by optical lattice technology and their behaviour are analysed from the quantum information perspective. Initially, we demonstrate that a triangular…
The C Operator in PT-Symmetric Quantum Theories
Carl M. Bender, Joachim Brod, Andre Refig +1
The Hamiltonian H specifies the energy levels and the time evolution of a quantum theory. It is an axiom of quantum mechanics that H be Hermitian because Hermiticity guarantees tha…
Quantum Deformed Canonical Transformations, W_{\infty}-algebras and Unitary Transformations
E. Gozzi, M. Reuter
We investigate the algebraic properties of the quantum counterpart of the classical canonical transformations using the symbol-calculus approach to quantum mechanics. In this frame…