74 citations · 326 across the 38 of their papers we have counts for
8 papers · 1 filter
Non-Kolmogorov-Arnold-Moser Quantum Sensors for Quantum Parameter Estimation
Naga Dileep Varikuti, Sourav Manna, Athreya Shankar +2
Non-KAM (Kolmogorov-Arnold-Moser) systems, when subjected to weak time-dependent perturbations, exhibit an abrupt transition to classical chaos through the breakdown of invariant p…
Quantum-enhanced single and multiparameter metrology in qutrit ensembles by generalized twisting dynamics
Deep Datta, Sayam Chakraborty, John Drew Wilson +2
Quantum-enhanced sensing with atomic ensembles has predominantly focused on qubit-based protocols, despite the growing ability of many experimental platforms to coherently control…
Programmable coherent site-selective spin control in rotating Penning-trap ion crystals
Nihar Makadia, Julian Y. Z. Jee, Gustavo Café de Miranda +4
Large ion crystals in Penning traps provide a platform for quantum simulation and sensing with hundreds of spins, but their continuous rigid-body rotation has so far limited flexib…
Quantum Beam-Splitter Cooling and Thermometry in Large Trapped-Ion Crystals
Kirthik Rajakumar, Ansh Das, Abhinay Pandey +1
We propose and characterize a protocol for rapid near-ground state cooling of the center-of-mass (c.m.) mode of a large trapped ion crystal. When the initial mean thermal occupatio…
Dynamical aspects of steady-state subradiance: Detailed balance and its breakdown
Athreya Shankar, Simon B. Jäger, Jarrod T. Reilly +3
The dynamics of dissipative many-body quantum systems sometimes admit an emergent classical description in terms of a Markov chain even though the corresponding state space contain…
Experimental realisation of topological spin textures in a Penning trap
Julian Y. Z. Jee, Nihar Makadia, Joseph H. Pham +4
Quantum simulation with controllable many-body platforms offers a powerful route to exploring complex phases and dynamics that are difficult to access in natural materials. Among t…
Optimizing Doppler laser cooling protocols for quantum sensing with 3D ion crystals in a Penning trap
John Zaris, Wes Johnson, Athreya Shankar +4
Large, 3D trapped ion crystals offer improved sensitivity in quantum sensing protocols, and are expected to be implemented as platforms in near-future experiments. However, numeric…
Many-Body Effects in Dark-State Laser Cooling
Muhammad Miskeen Khan, David Wellnitz, Bhuvanesh Sundar +6
We develop a unified many-body theory of two-photon dark-state laser cooling, the workhorse for preparing trapped ions close to their motional quantum ground state. For ions with a…