183 citations · 990 across the 26 of their papers we have counts for
26 papers
Achieving Heisenberg limit under noisy conditions with quantum Zeno dynamics and dynamical decoupling
Ke Zeng, Bakmou Lahcen, Yu Jiang +1
Quantum Zeno dynamics (QZD) and dynamical decoupling (DD) are useful tools that enable the effective suppression of noise in quantum systems. We consider the problem of when (i) no…
Restoring Heisenberg-Limited Precision in Non-Markovian Open Quantum Systems via Dynamical Decoupling
Bakmou Lahcen, Ke Zeng, Yu Jiang +1
Non-classical resources enable measurements to achieve a precision that exceeds the limits predicted by the central limit theorem. However, environmental noise arising from system-…
Kirkwood-Dirac Type Quasiprobabilities as Universal Identifiers of Nonclassical Quantum Resources
Kok Chuan Tan, Souradeep Sasmal
We show that a Kirkwood-Dirac type quasiprobability distribution is sufficient to reveal any arbitrary quantum resource. This is achieved by demonstrating that it is always possibl…
Fisher information universally identifies quantum resources
Kok Chuan Tan, Varun Narasimhachar, Bartosz Regula
We show that both the classical as well as the quantum definitions of the Fisher information faithfully identify resourceful quantum states in general quantum resource theories, in…
Variational quantum algorithms to estimate rank, quantum entropies, fidelity and Fisher information via purity minimization
Kok Chuan Tan, Tyler Volkoff
Variational quantum algorithms (VQAs) that estimate values of widely used physical quantities such as the rank, quantum entropies, the Bures fidelity and the quantum Fisher informa…
Error mitigation in quantum metrology via zero noise extrapolation
Zhuo Zhao, Kok Chuan Tan
We consider Zero Noise Extrapolation (ZNE) as an error mitigation strategy in quantum metrology. It is shown that noise expansion can be systematically performed over sufficiently…
Quantum stochastic series expansion methods
Kok Chuan Tan, Dhiman Bowmick, Pinaki Sengupta
A quantum implementation of the Stochastic Series Expansion (SSE) Monte Carlo method is proposed, and it is shown that quantum SSE offers significant advantages over classical impl…
Fast quantum imaginary time evolution
Kok Chuan Tan
A fast implementation of the quantum imaginary time evolution (QITE) algorithm called Fast QITE is proposed. The algorithmic cost of QITE typically scales exponentially with the nu…
Identifying quantum phase transitions via geometric measures of nonclassicality
Kok Chuan Tan
In this article, we provide theoretical support for the use of geometric measures of nonclassicality as a general tool to identify quantum phase transitions. We argue that divergen…
Nonclassical Light and Metrological Power: An Introductory Review
Kok Chuan Tan, Hyunseok Jeong
In this review, we introduce the notion of quantum nonclassicality of light, and the role of nonclassicality in optical quantum metrology. The first part of the paper focuses on de…
Negativity of quasiprobability distributions as a measure of nonclassicality
Kok Chuan Tan, Seongjeon Choi, Hyunseok Jeong
We demonstrate that the negative volume of any -paramatrized quasiprobability, including the Glauber-Sudashan -function, can be consistently defined and forms a continuous hi…
Quantum error correction assisted quantum metrology without entanglement
K. C. Tan, S. Omkar, H. Jeong
In this article we study the role that quantum resources play in quantum error correction assisted quantum metrology (QECQM) schemes. We show that there exist classes of such probl…
Nontrivial quantum observables can always be optimized via some form of coherence
Kok Chuan Tan, Seongjeon Choi, Hyunseok Jeong
In this paper we consider quantum resources required to maximize the mean values of any nontrivial quantum observable. We show that the task of maximizing the mean value of an obse…
Entanglement as the symmetric portion of correlated coherence
Kok Chuan Tan, Hyunseok Jeong
We show that the symmetric portion of correlated coherence is always a valid quantifier of entanglement, and that this property is independent of the particular choice of coherence…
Nonclassicality as a Quantifiable Resource for Quantum Metrology
Hyukjoon Kwon, Kok Chuan Tan, Tyler Volkoff +1
We establish the nonclassicality of continuous-variable states as a resource for quantum metrology. Based on the quantum Fisher information of multimode quadratures, we introduce t…
Comment on "Quantifying quantum coherence with quantum Fisher information"
Hyukjoon Kwon, Kok Chuan Tan, Seongjeon Choi +1
We show that contrary to the claim in Sci. Rep. 7, 15492 (2017), the quantum Fisher information itself is not a valid coherence measure based on the resource theory of coherence be…
Coherence, Quantum Fisher Information, Superradiance and Entanglement are Interconvertible Resources
Kok Chuan Tan, Seongjeon Choi, Hyukjoon Kwon +1
We demonstrate that quantum Fisher information and superradiance can be formulated as coherence measures in accordance with the resource theory of coherence, thus establishing a di…
Coherence as a Unit Resource for Quantum Error Correction
Kok Chuan Tan, S. Omkar, Hyeonseok Jeong
In this paper we study an error correcting protocol that specifically derives its error correcting properties from elementary units of coherence. The entire protocol from beginning…
Coherence, Asymmetry, and Quantum Macroscopicity
Hyukjoon Kwon, Chae-Yeun Park, Kok Chuan Tan +2
We investigate a measure of quantum coherence and its extension to quantify quantum macroscopicity. The coherence measure can also quantify the asymmetry of a quantum state with re…
Quantifying the Coherence Between Coherent States
Kok Chuan Tan, Tyler Volkoff, Hyukjoon Kwon +1
In this paper, we detail an orthogonalization procedure that allows for the quantification of the amount of coherence present an arbitrary superposition of coherent states. The pre…
Disturbance-Based Measure of Macroscopic Coherence
Hyukjoon Kwon, Chae-Yeun Park, Kok Chuan Tan +1
We propose a measure of macroscopic coherence based on the degree of disturbance caused by a coarse-grained measurement. Based on our measure, we point out that recently proposed c…
A Unified View of Quantum Correlations and Quantum Coherence
Kok Chuan Tan, Hyukjoon Kwon, Chae-Yeun Park +1
In this paper, we argue that quantum coherence in a bipartite system can be contained either locally or in the correlations between the subsystems. The portion of quantum coherence…
Coherent chemical kinetics as quantum walks I: Reaction operators for radical pairs
A. Chia, A. Gorecka, K. C. Tan +4
Classical chemical kinetics use rate-equation models to describe how a reaction proceeds in time. Such models are sufficient for describing state transitions in a reaction where co…
Quantum discord bounds the amount of distributed entanglement
T. K. Chuan, J. Maillard, K. Modi +3
The ability to distribute quantum entanglement is a prerequisite for many fundamental tests of quantum theory and numerous quantum information protocols. Two distant parties can in…