1.7k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Tata Institute of Fundamental ResearchIN874 papers
- Centre National de la Recherche ScientifiqueFR832 papers
- California Institute of TechnologyUS802 papers
- University of Maryland, College ParkUS798 papers
- Cornell UniversityUS796 papers
- Saha Institute of Nuclear PhysicsIN796 papers
- University of AntwerpBE796 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TorinoIT794 papers
- National Central UniversityTW794 papers
- University of WarsawPL794 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaIT793 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT793 papers
94 papers · 1 filter
Quantum dynamics of spin-J particles in static and rotating magnetic fields: Entanglement resonances and kinks
Nargis Sultana, Siddharth Seetharaman, Rejish Nath
We examine the quantum dynamics of both a single spin-J particle and a pair of spin-J particles in the presence of static and rotating magnetic fields, which can be important for q…
Upper bounds on charging power and tangible advantage in quantum batteries
Sreeram PG, J. Bharathi Kannan, M. S. Santhanam
Quantum battery is expected to outperform its classical counterpart due to quantum effects. Usually, in a quantum battery made of cells, quantum advantage is demonstrated throu…
No-go theorem for quantum realization of extremal correlations
Sujan V. K, Ravi Kunjwal
The study of quantum correlations is central to quantum information and foundations. The paradigmatic case of Bell scenarios considers product measurements implemented on a multipa…
Magnetic field orientation dependence of continuous-wave optically detected magnetic resonance with nitrogen-vacancy ensembles
Pralekh Dubey, Shashank Kumar, Chinmaya Singh +5
Continuous-wave optically detected magnetic resonance (CW-ODMR) measurements with nitrogen-vacancy (NV) spins in diamond are used for sensing DC magnetic fields from nearby magneti…
Enhancing the Performances of Autonomous Quantum Refrigerators via Two-Photon Transitions
Brij Mohan, Bijay Kumar Agarwalla, Manabendra Nath Bera
Conventional autonomous quantum refrigerators rely on uncorrelated heat exchange between the working system and baths via two-body interactions enabled by single-photon transitions…
Probing the localization effects in Krylov basis
J. Bharathi Kannan, Sreeram PG, Sanku Paul +2
Krylov complexity (K-complexity) is a measure of quantum state complexity that minimizes wavefunction spreading across all the possible bases. It serves as a key indicator of opera…
Partial Quantum Shadow Tomography for Structured Operators and its Experimental Demonstration using NMR
Aniket Sengupta, Arijit Chatterjee, G. J. Sreejith +1
Quantum shadow tomography based on the classical shadow representation provides an efficient way to estimate properties of an unknown quantum state without performing a full quantu…
Indefinite Time Directed Quantum Metrology
Gaurang Agrawal, Pritam Halder, Aditi Sen De
We explore the performance of the metrology scheme by employing a quantum time flip during encoding, a specific case of processes with indefinite time direction, which we refer to…
Spin Phonon Relaxation Dynamics from a Conical Intersection of Trapped Rydberg Ions
Manish Chaudhary, Rejish Nath, Weibin Li
Non-adiabatic processes near conical intersections are rooted in the stronger coupling between electronic and nuclear degrees of freedom. Using a system of two trapped Rydberg ions…
Enhanced non-macrorealism: Extreme violations of Leggett-Garg inequalities for a system evolving under superposition of unitaries
Arijit Chatterjee, H. S. Karthik, T. S. Mahesh +1
Quantum theory contravenes classical macrorealism by allowing a system to be in a superposition of two or more physically distinct states, producing physical consequences radically…
Information acquisition, scrambling, and sensitivity to errors in quantum chaos
Sreeram PG, Abinash Sahu, Naga Dileep Varikuti +3
Signatures of chaos can be understood by studying quantum systems whose classical counterpart is chaotic. However, the concepts of integrability, non-integrability and chaos extend…
Amplitude Amplification and Estimation using a Floquet system
Keshav V, M. S. Santhanam
The quantum kicked rotor (QKR) is a fundamental model of time-dependent quantum chaos and the physics of Anderson localization. It is one of the most well-studied Floquet systems.…
Quantum Alternating Operator Ansatz for the Preparation and Detection of Long-Lived Singlet States in NMR
Pratham Hullamballi, Vishal Varma, T. S. Mahesh
Designing efficient and robust quantum control strategies is vital for developing quantum technologies. One recent strategy is the Quantum Alternating Operator Ansatz (QAOA) sequen…
Quantum Algorithms for tensor-SVD
Jezer Jojo, Ankit Khandelwal, M Girish Chandra
A promising area of applications for quantum computing is in linear algebra problems. In this work, we introduce two new quantum t-SVD (tensor-SVD) algorithms. The first algorithm…
Rydberg superatoms: An artificial quantum system for quantum information processing and quantum optics
Xiao-Qiang Shao, Shi-Lei Su, Lin Li +3
Dense atom ensembles with Rydberg excitations display intriguing collective effects mediated by their strong, long-range dipole-dipole interactions. These collective effects, often…
Periodicity of dynamical signatures of chaos in quantum kicked top
Sreeram PG, M. S. Santhanam
A host of dynamical measures of quantum correlations -- out-of-time ordered correlators (OTOC), Loschmidt echo, generalized entanglement and observational entropy -- are useful to…
Impact of dephasing on non-equilibrium steady-state transport in fermionic chains with long-range hopping
Subhajit Sarkar, Bijay Kumar Agarwalla, Devendra Singh Bhakuni
Quantum transport in a non-equilibrium setting plays a fundamental role in understanding the properties of systems ranging from quantum devices to biological systems. Dephasing --…
On Modifying the Variational Quantum Singular Value Decomposition Algorithm
Jezer Jojo, Ankit Khandelwal, M Girish Chandra
In this work, we discuss two modifications that can be made to a known variational quantum singular value decomposition algorithm popular in the literature. The first is a change t…
Counterdiabatic driving for long-lived singlet state preparation
Abhinav Suresh, Vishal Varma, Priya Batra +1
The quantum adiabatic method, which maintains populations in their instantaneous eigenstates throughout the state evolution, is an established and often a preferred choice for stat…
Spontaneous localisation from a coarse-grained deterministic and non-unitary dynamics
Kartik Kakade, Avnish Singh, Tejinder P. Singh
Collapse of the wave function appears to violate the quantum superposition principle as well as deterministic evolution. Objective collapse models propose a dynamical explanation f…
Long-Lived Singlet State in an Oriented Phase and its Survival across the Phase Transition Into an Isotropic Phase
Vishal Varma, T S Mahesh
Long-lived singlet states (LLS) of nuclear spin pairs have been extensively studied and utilized in the isotropic phase via liquid state NMR. However, there are hardly any reports…
Chaos and localized phases in a two-body linear kicked rotor system
Anjali Nambudiripad, J. Bharathi Kannan, M. S. Santhanam
Despite the periodic kicks, a linear kicked rotor (LKR) is an integrable and exactly solvable model in which the kinetic energy term is linear in momentum. It was recently shown th…
Maximally entangled Rydberg-atom pairs via Landau-Zener sweeps
Dhiya Varghese, Sebastian Wüster, Weibin Li +1
We analyze the formation of maximally entangled Rydberg atom pairs subjected to Landau-Zener sweeps of the atom-light detuning. Though the populations reach a steady value at longe…
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…