4 papers
Two-dimensional - clock model: Enhanced symmetries, emergent orders, and Landau-incompatible transitions
Vishnu Pulloor Kuttanikkad, Abhishodh Prakash, Rajesh Narayanan +1
We present a comprehensive study on the frustrated - classical -state clock model with even on a two-dimensional square lattice, revealing a rich ensemble of pha…
Phases and Phase Transitions of the Disordered Quantum Clock Model
Vishnu Pulloor Kuttanikkad, Gaurav Khairnar, Rajesh Narayanan +1
We study the phases and phase transitions of a disordered one-dimensional quantum -state clock Hamiltonian using large-scale Monte Carlo simulations. Making contact with earlier…
Amplitude mode at the superfluid-insulator transition on a random lattice
Vishnu Pulloor Kuttanikkad, Rajesh Narayanan, Thomas Vojta
We study the superfluid-insulator quantum phase transition of interacting bosons by means of large-scale Monte Carlo simulations in the presence of both topological and generic que…
Critical Behavior and Collective Modes at the Superfluid Transition in Amorphous Systems
Vishnu Pulloor Kuttanikkad, Martin Puschmann, Rajesh Narayanan +1
We investigate the critical behavior and the dynamics of the amplitude (Higgs) mode close to the superfluid-insulator quantum phase transition in an amorphous system (i.e., a syste…