9 citations · 20 across the 9 of their papers we have counts for
10 papers
Universal Suppression of Dissipation across Conformal Interface in Open Quantum Critical Systems
Ruhanshi Barad, Tian Wu, Qicheng Tang +1
Conformal interfaces provide an important setting for studying universal transmission phenomena in one-dimensional quantum critical systems. While energy and information transmissi…
Exactly solvable non-unitary conformal interfaces in unitary CFTs
Qicheng Tang, Zixia Wei, Xueda Wen
We construct directly on the lattice a class of non-unitary interfaces that are both exactly conformal and exactly solvable, and establish their corresponding boundary and interfac…
Exact operator dynamics in Lindbladian Wess-Zumino-Witten conformal field theories
Qicheng Tang, Ruhanshi Barad, Xueda Wen
Understanding the time evolution of physical observables in open quantum many-body systems coupled to external environments is a natural and difficult problem, and exact results ar…
Detecting Higher Berry Phase via Boundary Scattering
Chih-Yu Lo, Xueda Wen
Higher Berry phase has recently been proposed to study the topology of the space of gapped many-body quantum systems. In this work, we develop a boundary-scattering approach to det…
Universal and Maximal Entanglement Swapping in General Fermionic Gaussian States
Jiyuan Fang, Qicheng Tang, Xueda Wen
Exploring universal entanglement structure in many-body systems is both fundamental and challenging, particularly when the system undergoes non-unitary operations. In this work, we…
Dissipation meets conformal interface in open quantum systems: How the relaxation rate is suppressed
Ruhanshi Barad, Qicheng Tang, Xueda Wen
Conformal interfaces play an important role in quantum critical systems. In closed systems, the transmission properties of conformal interfaces are typically characterized by two q…
Phase Transitions in Quasi-Periodically Driven Quantum Critical Systems: Analytical Results
Jiyuan Fang, Qi Zhou, Xueda Wen
In this work, we study analytically the phase transitions in quasi-periodically driven one dimensional quantum critical systems that are described by conformal field theories (CFTs…
Universal time evolution of string order parameter in quantum critical systems with boundary invertible or non-invertible symmetry breaking
Ruhanshi Barad, Qicheng Tang, Wei Zhu +1
The global symmetry, either invertible or non-invertible, has been extensively studied in two dimensional conformal field theories in recent years. When the theory is defined on a…
A critical state under weak measurement is not critical
Qicheng Tang, Xueda Wen
Critical systems host nontrivial entanglement structure that is generally sensitive to additional couplings. In the present work, we study the effect of weak measurements on the en…
Exactly solvable non-unitary time evolution in quantum critical systems I: Effect of complex spacetime metrics
Xueda Wen
In this series of works, we study exactly solvable non-unitary time evolutions in one-dimensional quantum critical systems ranging from quantum quenches to time-dependent drivings.…