Events in Physics
Gerardo Adesso, Nottingham
Location: PS1.28
Ground state factorization versus frustration in spin systems
We investigate the existence of factorized ground states in Heisenberg-like quantum spin models with antiferromagnetic interactions of arbitrary range and exhibiting a varying degree of frustration. After reviewing a method developed for frustration-free systems based on tools from quantum information theory, we extend it to characterize the competition between frustration and ground state factorization. Low frustration is shown to signaled by the existence of factorized ground states at specific values of the external field, while for higher frustration degrees the factorized eigenstates do not minimize the energy, leaving necessarily room for entanglement in the ground state. The compatibility threshold, characterizing the frustration-driven transition between order (factorization) and disorder (correlation), is investigated and exact analytical factorized solutions are obtained for short-range as well as infinite-range frustrated quantum magnets.Ground state factorization is thus revealed as an effective tool to probe quantum frustration in cooperative systems.
Academic Leave Diary
Physics Days
Research Group Events
.
Open Funder Deadlines
UKRI - Daphne Jackson Fellowship
.
UKRI Deadlines
Due to the implementation of a new UKRI funding system (TFS) there will be a fixed quarterly deadlines for some grants which would previously have been on open calls, this is to allow necessary system amendments and updates.
The first deadline after implementation will be 28th September 2023 and applies to those calls listed below:
EPSRC Post Doctoral Fellowship
EPSRC Working with overseas scientists