16 citations · 33 across the 9 of their papers we have counts for
10 papers
Dynamical signatures of deconfined spinons in dimerized sawtooth chains
Nishan Ranabhat, Brandon B. Le, Seung-Hun Lee +1
We study the ground-state properties and dynamical response of the Heisenberg model on the sawtooth chain in and away from the exactly solvable valence-bond-solid (VBS) point. We e…
Quantum complexity across thermal phase transition in the transverse field Ising chain with long-range couplings
Meghadeepa Adhikary, Nishan Ranabhat, Mario Collura
We investigate the behavior of the Schmidt gap, the von Neumann entanglement entropy, and the non-stabiliserness in proximity to the classical phase transition of the one-dimension…
Probability-Phase Mutual Information
Cameron Hahn, Nishan Ranabhat, Fabio Anza
Quantum coherence is an exquisitely quantum phenomenon that depends on both probability amplitudes and relative phases. Standard coherence measures quantify superposition within de…
Non-classicality at equilibrium and efficient predictions under non-commuting charges
Lodovico Scarpa, Nishan Ranabhat, Amit Te'eni +4
A quantum thermodynamic system can conserve non-commuting observables, but the consequences of this phenomenon on relaxation are still not fully understood. We investigate this pro…
Large-scale portfolio optimization with variational neural annealing
Nishan Ranabhat, Behnam Javanparast, David Goerz +1
Portfolio optimization is a routine asset management operation conducted in financial institutions around the world. However, under real-world constraints such as turnover limits a…
Tensor Network Techniques for Quantum Computation
Mario Collura, Guglielmo Lami, Nishan Ranabhat +1
This book serves as an introductory yet thorough guide to tensor networks and their applications in quantum computation and quantum information, designed for advanced undergraduate…
Beginner's Lecture Notes on Quantum Spin Chains, Exact Diagonalization and Tensor Networks
Guglielmo Lami, Mario Collura, Nishan Ranabhat
Aimed at introducing readers to the physics of strongly correlated many-body systems, these notes focus on numerical methods, with detailed discussions on implementing working code…
Dynamical deconfinement transition driven by density of excitations
Nishan Ranabhat, Alessandro Santini, Emanuele Tirrito +1
We investigate the deconfinement transition driven by excitations in long-range spin models. At low temperatures, these models exhibit a confined phase where domain-wall (or kinks)…
Thermalization of long range Ising model in different dynamical regimes: a full counting statistics approach
Nishan Ranabhat, Mario Collura
We study thermalization of transverse field Ising chain with power law decaying interaction following a global quantum quench of the transverse field to two different…
Dynamics of the order-parameter statistics in the long-range Ising model
Nishan Ranabhat, Mario Collura
We study the relaxation of the local ferromagnetic order in the transverse field quantum Ising chain with power-law decaying interactions . We prepare the system in the GHZ…