6 papers
Hyperimaginaries and Exactness of the Pro-Completion
Owen Ngo Hang Chan
Given a complete first-order theory , we characterise elimination of hyperimaginaries in in terms of the exactness of the pro-completion of t…
Anomaly and symmetry-charge flow in mixed states
Ze-Min Huang, Sebastian Diehl
The -dimensional chiral anomaly is a paradigmatic exact result in quantum field theory, traditionally formulated for zero-temperature pure states where it arises from spectr…
Topological response in open quantum systems with weak symmetries
Ze-Min Huang, Sebastian Diehl, Xiao-Qi Sun
In open quantum systems, the interaction of the system with its environment gives rise to two types of symmetry: a strong one, where the system's symmetry charge is conserved exact…
Interaction-induced topological phase transition at finite temperature
Ze-Min Huang, Sebastian Diehl
We demonstrate the existence of topological phase transitions in interacting, symmetry-protected quantum matter at finite temperatures. Using a combined numerical and analytical ap…
Coherent information as a mixed-state topological order parameter of fermions
Ze-Min Huang, Luis Colmenarez, Markus Müller +1
Quantum error correction protects quantum information against decoherence provided the noise strength remains below a critical threshold. This threshold marks the critical point fo…
Accurate optimal quantum error correction thresholds from coherent information
Luis Colmenarez, Ze-Min Huang, Sebastian Diehl +1
Quantum error correcting (QEC) codes protect quantum information from decoherence, as long as error rates fall below critical error thresholds. In general, obtaining thresholds imp…