944 citations · 2.4k across the 32 of their papers we have counts for
32 papers
Efficient Many-Body Shadow Metrology via Clifford Lensing
Sooryansh Asthana, Conan Alexander, Anubhav Kumar Srivastava +2
Quantum probes that enable enhanced exploration and characterization of complex systems are central to modern science, spanning applications from biology to astrophysics and chemic…
Projected Optimal Sensors from Operator Orbits
Sooryansh Asthana, Yeshma Ibrahim, Norman Tze Wei Koo +1
We unify Ramsey, twist-untwist, and random quantum sensors using operator algebra and account for the Fisher scaling of various sensor designs. We illustrate how the operator orbit…
Symmetries & Correlations in Continous Time Crystals
Ankan Mukherjee, Yeshma Ibrahim, Michal Hajdušek +1
We demonstrate the inadequacy of mean-field theory by exploring the effects of initial state correlations on the dynamics of continuous time crystals, necessitating higher-order cu…
Non-Ideal Measurement Heat Engines
Abhisek Panda, Felix C. Binder, Sai Vinjanampathy
We discuss the role of non-ideal measurements within the context of measurement engines by contrasting examples of measurement engines which have the same work output but with vary…
Shallow-Depth Variational Quantum Hypothesis Testing
Mahadevan Subramanian, Sai Vinjanampathy
We present a variational quantum algorithm for differentiating several hypotheses encoded as quantum channels. Both state preparation and measurement are simultaneously optimized u…
Synchronization Lower Bounds the Efficiency of Near-Degenerate Thermal Machines
Taufiq Murtadho, Juzar Thingna, Sai Vinjanampathy
We study the relationship between quantum synchronization and the thermodynamic performance of a four-level near-degenerate extension of the Scovil-Schulz Dubois thermal maser. We…
Cooperation and Competition in Synchronous Open Quantum Systems
Taufiq Murtadho, Sai Vinjanampathy, Juzar Thingna
Synchronization between limit cycle oscillators can arise through entrainment to an external drive or through mutual coupling. The interplay between the two mechanisms has been stu…
Convex Optimization for Nonequilibrium Steady States on a Hybrid Quantum Processor
Jonathan Wei Zhong Lau, Kian Hwee Lim, Kishor Bharti +2
Finding the transient and steady state properties of open quantum systems is a central problem in various fields of quantum technologies. Here, we present a quantum-assisted algori…
Seeding crystallization in time
Michal Hajdušek, Parvinder Solanki, Rosario Fazio +1
We introduce the concept of seeding of crystallization in time by studying the dynamics of an ensemble of coupled continuous time crystals. We demonstrate that a single subsystem i…
Role of Coherence and Degeneracies in Quantum Synchronisation
Parvinder Solanki, Noufal Jaseem, Michal Hajdušek +1
Progress on the study of synchronisation in quantum systems has been largely driven by specific examples which resulted in several examples of frequency entrainment as well as mutu…
Generalized Measure of Quantum synchronization
Noufal Jaseem, Michal Hajdušek, Parvinder Solanki +3
We present a generalized information-theoretic measure of synchronization in quantum systems. This measure is applicable to dynamics of anharmonic oscillators, few-level atoms, and…
Comment on "Noise, not squeezing, boosts synchronization in the deep quantum regime" arXiv:2002.07488 (2020)
Michal Hajdušek, Sai Vinjanampathy
A recent manuscript ( arXiv:2002.07488 (2020) ) compares the effect of linear dissipators and squeezing drive on quantum synchronisation. We point at serious mistakes in the validi…
Weak-value magnetometry for precision tests of fundamental physics
Sounok Ghosh, Leong-Chuan Kwek, Daniel R. Terno +1
Progress in testing fundamental physics relies on our ability to measure exceedingly small physical quantities. Using a Ca trapped ion system as an example we show tha…
Observation of quantum phase synchronization in spin-1 atoms
Arif Warsi Laskar, Pratik Adhikary, Suprodip Mondal +3
With growing interest in quantum technologies, possibilities of synchronizing quantum systems has garnered significant recent attention. In experiments with dilute ensemble of lase…
Quantum Correlations Can Speed Up All Classical Computation
Carlos Perez-Delgado, Sai Vinjanampathy
Quantum algorithms that can speed up certain tasks, such as factorisation and unstructured search, have driven a decades-long development of quantum computers and quantum technolog…
Preparations and Weak Quantum Control can Witness non-Markovianity
Shlok Nahar, Sai Vinjanampathy
The dynamics of a system that is initially correlated with an environment is almost always non-Markovian. Hence it is important to characterise such initial correlations experiment…
Squeezing Enhances Quantum Synchronization
Sameer Sonar, Michal Hajdušek, Manas Mukherjee +4
It is desirable to observe synchronization of quantum systems in the quantum regime, defined by low number of excitations and a highly non-classical steady state of the self-sustai…
Speeding up Thermalisation via Open Quantum System Variational Optimisation
Nishchay Suri, Felix C. Binder, Bhaskaran Muralidharan +1
Optimizing open quantum system evolution is an important step on the way to achieving quantum computing and quantum thermodynamic tasks. In this article, we approach optimisation v…
Enhancing the charging power of quantum batteries
Francesco Campaioli, Felix A. Pollock, Felix C. Binder +4
Can collective quantum effects make a difference in a meaningful thermodynamic operation? Focusing on energy storage and batteries, we demonstrate that quantum mechanics can lead t…
Quantum Thermodynamics
Sai Vinjanampathy, Janet Anders
Quantum thermodynamics is an emerging research field aiming to extend standard thermodynamics and non-equilibrium statistical physics to ensembles of sizes well below the thermodyn…
Correlations, operations and the second law of thermodynamics
Sai Vinjanampathy, Kavan Modi
Completely positive trace preserving maps are essential for the formulation of the second law of thermodynamics. The dynamics of quantum systems, correlated with their environments…
Quantum thermodynamics of general quantum processes
Felix C. Binder, Sai Vinjanampathy, Kavan Modi +1
Accurately describing work extraction from a quantum system is a central objective for the extension of thermodynamics to individual quantum systems. The concepts of work and heat…
Entropy bounds for quantum processes with initial correlations
Sai Vinjanampathy, Kavan Modi
Quantum technology is progressing towards fast quantum control over systems interacting with small environments. Hence such technologies are operating in a regime where the environ…
Beating the Clauser-Horne-Shimony-Holt and the Svetlichny games with Optimal States
Hong-Yi Su, Changliang Ren, Jing-Ling Chen +6
We study the relation between the maximal violation of Svetlichny's inequality and the mixedness of quantum states and obtain the optimal state (i.e., maximally nonlocal mixed stat…