61 citations · 174 across the 10 of their papers we have counts for
10 papers
Charting the space of ground states with tensor networks
Marvin Qi, David T. Stephen, Xueda Wen +4
We employ matrix product states (MPS) and tensor networks to study topological properties of the space of ground states of gapped many-body systems. We focus on families of states…
Fracton superfluid hydrodynamics
Charles Stahl, Marvin Qi, Paolo Glorioso +2
We examine the hydrodynamics of systems with spontaneously broken multipolar symmetries using a systematic effective field theory. We focus on the simplest non-trivial setting: a s…
Homotopical Foundations of Parametrized Quantum Spin Systems
Agnes Beaudry, Michael Hermele, Juan Moreno +3
In this paper, we present a homotopical framework for studying invertible gapped phases of matter from the point of view of infinite spin lattice systems, using the framework of al…
Anomalous hydrodynamics with triangular point group in 2 + 1 dimensions
Marvin Qi, Jinkang Guo, Andrew Lucas
We present a theory of hydrodynamics for a vector U(1) charge in 2+1 dimensions, whose rotational symmetry is broken to the point group of an equilateral triangle. We show that it…
Fracton magnetohydrodynamics
Marvin Qi, Oliver Hart, Aaron J. Friedman +2
We extend recent work on hydrodynamics with global multipolar symmetries -- known as "fracton hydrodynamics" -- to systems in which the multipolar symmetries are gauged. We refer t…
Continuous Dependence on the Initial Data in the Kadison Transitivity Theorem and GNS Construction
Daniel Spiegel, Juan Moreno, Marvin Qi +3
We consider how the outputs of the Kadison transitivity theorem and Gelfand-Naimark-Segal construction may be obtained in families when the initial data are varied. More precisely,…
Flow of (higher) Berry curvature and bulk-boundary correspondence in parametrized quantum systems
Xueda Wen, Marvin Qi, Agnès Beaudry +5
This paper is concerned with the physics of parametrized gapped quantum many-body systems, which can be viewed as a generalization of conventional topological phases of matter. In…
Distinguishing viscous, ballistic, and diffusive current flows in anisotropic metals
Marvin Qi, Andrew Lucas
We show that in anisotropic Fermi liquids where momentum-conserving scattering is much faster than momentum-relaxing scattering processes, local imaging of the electric current flo…
Fracton phases via exotic higher-form symmetry-breaking
Marvin Qi, Leo Radzihovsky, Michael Hermele
We study p-string condensation mechanisms for fracton phases from the viewpoint of higher-form symmetry, focusing on the examples of the X-cube model and the rank-two symmetric-ten…
Causal holographic information does not satisfy the linearized quantum focusing condition
Zicao Fu, Donald Marolf, Marvin Qi
The Hubeny-Rangamani causal holographic information (CHI) defined by a region of a holographic quantum field theory (QFT) is a modern version of the idea that the area of event…