7 citations · 16 across the 11 of their papers we have counts for
11 papers
Krylov Complexity in Periodically Driven CFTs and Critical Fermions
Ankit Gill, Anurag Sarkar
We study Krylov construction in periodically driven conformal field theories and their lattice realisations via critical fermions. Two types of driving are considered: a square-wav…
Loss-aware state space geometry for quantum variational algorithms
Ankit Gill, Kunal Pal
The natural gradient descent optimisation technique is an efficient optimising protocol for broad classes of classical and quantum systems that takes the underlying geometry of the…
Geometry of quantum states in random matrix ensembles and the chaos-integrability transition
Ankit Gill, Keun-Young Kim, Kunal Pal +1
We consider the geometry of quantum states associated with random matrix Hamiltonians belonging to ensembles that exhibit an integrable-to-chaotic transition in terms of the neares…
Speed Limits and Scrambling in Krylov Space
Ankit Gill, Tapobrata Sarkar
We investigate the relationship between Krylov complexity and operator quantum speed limits (OQSLs) of the complexity operator and level repulsion in random/integrable matrices and…
Complexity in two-point measurement schemes
Ankit Gill, Kunal Pal, Kuntal Pal +1
We show that the characteristic function of the probability distribution associated with the change of an observable in a two-point measurement protocol with a perturbation can be…
Spread complexity evolution in quenched interacting quantum systems
Mamta Gautam, Kunal Pal, Kuntal Pal +3
We analyse time evolution of spread complexity (SC) in an isolated interacting quantum many-body system when it is subjected to a sudden quench. The differences in characteristics…
Spread Complexity in free fermion models
Mamta Gautam, Nitesh Jaiswal, Ankit Gill
We study spread complexity and the statistics of work done for quenches in the three-spin interacting Ising model, the XY spin chain, and the Su-Schrieffer-Heeger model. We study t…
Time evolution of spread complexity and statistics of work done in quantum quenches
Kuntal Pal, Kunal Pal, Ankit Gill +1
We relate the probability distribution of the work done on a statistical system under a sudden quench to the Lanczos coefficients corresponding to evolution under the post-quench H…
FOTOC complexity in an extended Lipkin-Meshkov-Glick model
Nitesh Jaiswal, Mamta Gautam, Ankit Gill +1
We study fidelity out-of-time-order correlators (FOTOCs) in an extended Lipkin-Meshkov-Glick model and demonstrate that these exhibit distinctive behaviour at quantum phase transit…
Complexity and quenches in models with three and four spin interactions
Mamta Gautam, Nitesh Jaiswal, Ankit Gill +1
We study information theoretic quantities in models with three and four spin interactions. These models show distinctive characteristics compared to their nearest neighbour counter…
Evolution of circuit complexity in a harmonic chain under multiple quenches
Kuntal Pal, Kunal Pal, Ankit Gill +1
We study Nielsen's circuit complexity in a periodic harmonic oscillator chain, under single and multiple quenches. In a multiple quench scenario, it is shown that the complexity sh…