82 citations · 285 across the 25 of their papers we have counts for
25 papers
Dependence of Krylov complexity on the initial operator and state
Sreeram PG, J. Bharathi Kannan, Ranjan Modak +1
Krylov complexity, a quantum complexity measure which uniquely characterizes the spread of a quantum state or an operator, has recently been studied in the context of quantum chaos…
Probing quantum phase transition via quantum speed limit
M Suman, S. Aravinda, Ranjan Modak
Quantum speed limit (QSL) is the lower bound on the time required for a state to evolve to a desired final state under a given Hamiltonian evolution. Three well-known QSLs exist Ma…
Quest for optimal quantum resetting: protocols for a particle on a chain
Pallabi Chatterjee, S. Aravinda, Ranjan Modak
In the classical context, it is well known that, sometimes, if the search does not find its target, it is better to start the process anew again, known as resetting. The quantum co…
Ergodic and mixing quantum channels: From two-qubit to many-body quantum systems
S. Aravinda, Shilpak Banerjee, Ranjan Modak
The development of classical ergodic theory has had a significant impact in the areas of mathematics, physics, and, in general, applied sciences. The quantum ergodic theory of Hami…
Non-Hermitian description of sharp quantum resetting
Ranjan Modak, S. Aravinda
We study a non-interacting quantum particle, moving on a one-dimensional lattice, which is subjected to repetitive measurements. We investigate the consequence when such motion is…
Complexity growth for one-dimensional free-fermionic lattice models
S. Aravinda, Ranjan Modak
Complexity plays a very important part in quantum computing and simulation where it acts as a measure of the minimal number of gates that are required to implement a unitary circui…
Witnessing quantum chaos using observational entropy
Sreeram PG, Ranjan Modak, S. Aravinda
We study observation entropy (OE) for the Quantum kicked top (QKT) model, whose classical counterpart possesses different phases: regular, mixed, or chaotic, depending on the stren…
Observational entropic study of Anderson localization
Ranjan Modak, S. Aravinda
The notion of the thermodynamic entropy in the context of quantum mechanics is a controversial topic. While there were proposals to refer von Neumann entropy as the thermodynamic e…
Construction and local equivalence of dual-unitary operators: from dynamical maps to quantum combinatorial designs
Suhail Ahmad Rather, S. Aravinda, Arul Lakshminarayan
While quantum circuits built from two-particle dual-unitary (maximally entangled) operators serve as minimal models of typically nonintegrable many-body systems, the construction a…
From dual-unitary to quantum Bernoulli circuits: Role of the entangling power in constructing a quantum ergodic hierarchy
S. Aravinda, Suhail Ahmad Rather, Arul Lakshminarayan
Deterministic classical dynamical systems have an ergodic hierarchy, from ergodic through mixing, to Bernoulli systems that are "as random as a coin-toss". Dual-unitary circuits ha…
Creating ensembles of dual unitary and maximally entangling quantum evolutions
Suhail Ahmad Rather, S. Aravinda, Arul Lakshminarayan
Maximally entangled bipartite unitary operators or gates find various applications from quantum information to being building blocks of minimal models of many-body quantum chaos, a…
Advantage in two-way communication using non-classical states of light
Bohnishikha Ghosh, Amit Mukherjee, S. Aravinda
The advantage of using a single-photon two-mode entangled state in two-way communication via maximal violation of an inequality associated with the `Guess Your Neighbour's Input' (…
Hierarchical axioms for quantum mechanics
S. Aravinda, Anirban Pathak, R. Srikanth
The origin of nonclassicality in quantum mechanics (QM) has been investigated recently by a number of authors with a view to identifying axioms that would single out quantum mechan…
Ruling out the class of statistical processes involving two noninteracting identical particles in two modes
S. Aravinda
In the framework of Generalized probabilistic theories (GPT), we illustrate a class of statistical processes in case of two noninteracting identical particles in two modes that sat…
Exclusivity principle and unphysicality of Garg-Mermin correlation
S. Aravinda, Amit Mukherjee, Manik Banik
The question concerning the physical realizability of a probability distribution is of quite importance in Quantum foundations. Specker first pointed out that this question cannot…
Nonclassicality of local bipartite correlations
C. Jebaratnam, S. Aravinda, R. Srikanth
Simulating quantum nonlocality and steering requires augmenting pre-shared randomness with non-vanishing communication cost. This prompts the question of how one may provide such a…
On the origin of nonclassicality in single systems
S. Aravinda, R. Srikanth, Anirban Pathak
In the framework of certain general probability theories of single systems, we identify various nonclassical features such as incompatibility, multiple pure-state decomposability,…
Extending quantum mechanics entails extending special relativity
S. Aravinda, R. Srikanth
The complementarity between signaling and randomness in any communicated resource that can simulate singlet statistics is generalized by relaxing the assumption of free will in the…
The essence of nonclassicality: non-vanishing signal deficit
S. Aravinda, R. Srikanth
Nonclassical properties of correlations-- like unpredictability, no-cloning and uncertainty-- are known to follow from two assumptions: nonlocality and no-signaling. For two-input-…
Orthogonal-state-based cryptography in quantum mechanics and local post-quantum theories
S. Aravinda, Anindita Banerjee, Anirban Pathak +1
We introduce the concept of cryptographic reduction, in analogy with a similar concept in computational complexity theory. In this framework, class of crypto-protocols reduces…
Exploring the role of Leggett-Garg inequality for quantum cryptography
Akshata Shenoy H., S. Aravinda, R. Srikanth +1
In the cryptographic context, an earlier unexplored application of the temporal version of the Bell-type inequality is shown here in the device-independent (DI) scenario. This is d…
Complementarity between signalling and local indeterminacy in quantum nonlocal correlations
S. Aravinda, R. Srikanth
The correlations that violate the CHSH inequality are known to have complementary contributions from signaling and local indeterminacy. This complementarity is shown to represent a…
Unification of Bell, Leggett-Garg and Kochen-Specker inequalities: A hybrid spatio-temporal inequality
Siddhartha Das, S. Aravinda, R. Srikanth +1
The Bell-type (spatial), Kochen-Specker (contextuality) or Leggett-Garg (temporal) inequalities are based on classically plausible but otherwise quite distinct assumptions. For any…
On a general criterion for nonclassicality from a signaling perspective
S. Aravinda, R. Srikanth
We argue that the essence of nonclassicality of a bipartite correlation is a positive signal deficit-- the communication cost excess over the available signaling. By this criterion…