4 papers
Planckian bound on the local equilibration time
Marvin Qi, Alexey Milekhin, Luca Delacrétaz
The local equilibration time of quantum many-body systems is conjectured to be bounded below by the Planckian time . We formalize this conjecture by definin…
A Classifying Space for Phases of Matrix Product States
Daniel D. Spiegel, Marvin Qi, David T. Stephen +3
We construct a topological space consisting of translation invariant injective matrix product states (MPS) of all physical and bond dimensions and show that it has th…
The Symmetry Taco: Equivalences between Gapped, Gapless, and Mixed-State SPTs
Marvin Qi, Ramanjit Sohal, Xie Chen +2
Symmetry topological field theory (SymTFT), or topological holography, offers a unifying framework for describing quantum phases of matter and phase transitions between them. While…
Planon-modular fracton orders
Evan Wickenden, Marvin Qi, Arpit Dua +1
There are now many examples of gapped fracton models, which are defined by the presence of restricted-mobility excitations above the quantum ground state. However, the theory of fr…