116 citations · 370 across the 11 of their papers we have counts for
11 papers
Statistical Mechanics of Non-Abelian Learnability Transitions
Ruochen Ma, Romain Vasseur
Monitored many-body quantum systems can undergo sharp learnability transitions characterized by how much information can be learned by the observer. When the dynamics conserves a n…
Lieb-Schultz-Mattis Theorem with Long-Range Interactions
Ruochen Ma
We prove the Lieb-Schultz-Mattis theorem in -dimensional spin systems exhibiting spin rotation and lattice translation symmetries in the presence of local interactio…
Strong-to-Weak Spontaneous Symmetry Breaking in Mixed Quantum States
Leonardo A. Lessa, Ruochen Ma, Jian-Hao Zhang +3
Symmetry in mixed quantum states can manifest in two distinct forms: strong symmetry, where each individual pure state in the quantum ensemble is symmetric with the same charge, an…
Symmetry Protected Topological Phases of Mixed States in the Doubled Space
Ruochen Ma, Alex Turzillo
The interplay of symmetry and topology in quantum many-body mixed states has recently garnered significant interest. In a phenomenon not seen in pure states, mixed states can exhib…
Topological Phases with Average Symmetries: the Decohered, the Disordered, and the Intrinsic
Ruochen Ma, Jian-Hao Zhang, Zhen Bi +2
Global symmetries greatly enrich the landscape of topological quantum phases, playing an essential role from topological insulators to fractional quantum Hall effect. Topological p…
Exploring critical systems under measurements and decoherence via Keldysh field theory
Ruochen Ma
We employ an -replica Keldysh field theory to investigate the effects of measurements and decoherence on long distance behaviors of quantum critical states. We classify differen…
Average Symmetry-Protected Topological Phases
Ruochen Ma, Chong Wang
Symmetry-protected topological (SPT) phases are many-body quantum states that are topologically nontrivial as long as the relevant symmetries are unbroken. In this work we show tha…
Emergent anomaly of Fermi surfaces: a simple derivation from Weyl fermions
Ruochen Ma, Chong Wang
The Fermi liquid has an emergent low-energy symmetry that corresponds to charge conservation at each momentum on the Ferm surface. Recently Else, Thorngren and Senthil (ETS) argued…
Edge physics at the deconfined transition between a quantum spin Hall insulator and a superconductor
Ruochen Ma, Liujun Zou, Chong Wang
We study the edge physics of the deconfined quantum phase transition (DQCP) between a spontaneous quantum spin Hall (QSH) insulator and a spin-singlet superconductor (SC). Although…
Emergent QCD Quantum Phase Transitions of Fractional Chern Insulators
Ruochen Ma, Yin-Chen He
Motivated by the recent work of QED-Chern-Simons quantum critical points of fractional Chern insulators (Phys. Rev. X \textbf{8}, 031015, (2018)), we study its non-Abelian gene…
A theory of deconfined pseudo-criticality
Ruochen Ma, Chong Wang
It has been proposed that the deconfined criticality in -- the quantum phase transition between a Neel anti-ferromagnet and a valence-bond-solid (VBS) -- may actually be p…