27 citations · 98 across the 8 of their papers we have counts for
8 papers
Optimal Waveforms for Dipole Moment Estimation with Coherent States
Karthik Chinni, Nicolás Quesada
We investigate quantum sensing for spectroscopy in a system consisting of a two-level atom coupled to a continuum of modes. We focus on optimizing the pulse shape of a coherent sta…
Beyond the parametric approximation: pump depletion, entanglement and squeezing in macroscopic down-conversion
Karthik Chinni, Nicolás Quesada
We study the dynamics of the pump mode in the down-conversion Hamiltonian using the cumulant expansion method, perturbation theory, and the full numerical simulation of systems wit…
Probing scrambling and operator size distributions using random mixed states and local measurements
Philip Daniel Blocher, Karthik Chinni, Sivaprasad Omanakuttan +1
The dynamical spreading of quantum information through a many-body system, typically called scrambling, is a complex process that has proven to be essential to describe many proper…
Trotter Errors and the Emergence of Chaos in Quantum Simulation
Kevin W. Kuper, Jon P. Pajaud, Karthik Chinni +2
As noisy intermediate-scale quantum (NISQ) processors increase in size and complexity, their use as general purpose quantum simulators will rely on algorithms based on the Trotter-…
Scrambling and quantum chaos indicators from long-time properties of operator distributions
Sivaprasad Omanakuttan, Karthik Chinni, Philip Daniel Blocher +1
Scrambling is a key concept in the analysis of nonequilibrium properties of quantum many-body systems. Most studies focus on its characterization via out-of-time-ordered correlatio…
Floquet time crystals in driven spin systems with all-to-all -body interactions
Manuel H. Muñoz-Arias, Karthik Chinni, Pablo M. Poggi
We show the emergence of Floquet time crystal (FTC) phases in the Floquet dynamics of periodically driven -spin models, which describe a collection of spin-1/2 particles with al…
Trotter errors from dynamical structural instabilities of Floquet maps in quantum simulation
Karthik Chinni, Manuel H. Muñoz-Arias, Ivan H. Deutsch +1
We study the behavior of errors in the quantum simulation of spin systems with long-range multi-body interactions resulting from the Trotter-Suzuki decomposition of the time-evolut…
The effect of chaos on the simulation of quantum critical phenomena in analog quantum simulators
Karthik Chinni, Pablo M. Poggi, Ivan H. Deutsch
We study how chaos, introduced by a weak perturbation, affects the reliability of the output of analog quantum simulation. As a toy model, we consider the Lipkin-Meshkov-Glick (LMG…