TY  - THES
AB  - Multiparticle entanglement is a useful resource in quantum information processing. It is involved in some quantum key distribution protocols, quantum metrology and many other physical applications and phenomena and can be experimentally observed in various quantum systems. Having said this, its classification, detection and especially its quantification is quite challenging. To this day there exists no general mixed state measure for genuine multiparticle entanglement, which can be computed and analytically treated at the same time.

In this thesis the analytical characterisation of genuine multiparticle entanglement in quantum systems using the computable genuine multiparticle negativity as entanglement measure is provided. Furthermore, the notion of stabiliser states, which are families of symmetric genuine multiparticle entangled states, is generalised and a useful method to exploit local symmetries to speed up the computation of the investigated entanglement measure is provided.
AU  - Hofmann, Martin
DA  - 2014
KW  - Qubit
KW  - Quantenkorrelationen
KW  - Echte Mehrteilchenverschränkung
KW  - Echte Mehrteilchennegativität
KW  - XY-Model im transversalen Feld
KW  - Quantum Correlations
KW  - Genuine Multiparticle Entanglement
KW  - Genuine Multiparticle Negativity
KW  - XY-Model in a Transverse Field
KW  - Phase Transitions
LA  - eng
PY  - 2014
TI  - Characterizing quantum correlations: the genuine multiparticle negativity as entanglement monotone
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:467-8074
Y2  - 2024-11-22T08:51:21
ER  -