@article {29463,
	title = {Eigenstate entanglement in integrable collective spin models},
	year = {2021},
	url = {https://arxiv.org/abs/2108.09866},
	author = {M. Kumari and {\'A}.M. Alhambra}
}
@article {29461,
	title = {Quantum coherence as a signature of chaos},
	journal = {Phys. Rev. Research 3, 023214 (2021)},
	year = {2021},
	url = {https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.3.023214},
	author = {N. Anand and G. Styliaris and M. Kumari and P. Zanardi}
}
@article {29462,
	title = {Wigner negativity in spin-j systems},
	journal = {Phys. Rev. Research 3, 033134 (2021)},
	year = {2021},
	url = {https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.3.033134},
	author = {J. Davis and M. Kumari and R.B. Mann and S. Ghose}
}
@article {13550,
	title = {Untangling entanglement and chaos},
	journal = {Physical Review A},
	volume = {99},
	year = {2019},
	pages = {042311},
	abstract = {We present a method to calculate an upper bound on the generation of entanglement in any spin system using the Fannes-Audenaert inequality for the von Neumann entropy. Our method is not only useful for efficiently estimating entanglement, but also shows that entanglement generation depends on the distance of the quantum states of the system from corresponding minimum-uncertainty spin coherent states. We illustrate our method using a quantum kicked top model, and show that our upper bound is a very good estimator for entanglement generated in both regular and chaotic regions. In a deep quantum regime, the upper bound on entanglement can be high in both regular and chaotic regions, while in the semiclassical limit, the bound is higher in chaotic regions where the quantum states diverge from the corresponding spin coherent states. Our analysis thus explains previous studies and clarifies the relationship between chaos and entanglement.},
	url = {https://journals.aps.org/pra/abstract/10.1103/PhysRevA.99.042311},
	author = {Meenu Kumari and Shohini Ghose}
}
@article {13548,
	title = {Quantum-classical correspondence in the vicinity of periodic orbits},
	journal = {Phys. Rev. E},
	volume = {97},
	year = {2018},
	pages = {052209},
	abstract = {Quantum-classical correspondence in chaotic systems is a long-standing problem. We describe a method to quantify Bohr{\textquoteright}s correspondence principle and calculate the size of quantum numbers for which we can expect to observe quantum-classical correspondence near periodic orbits of Floquet systems. Our method shows how the stability of classical periodic orbits affects quantum dynamics. We demonstrate our method by analyzing quantum-classical correspondence in the quantum kicked top (QKT), which exhibits both regular and chaotic behavior. We use our correspondence conditions to identify signatures of classical bifurcations even in a deep quantum regime. Our method can be used to explain the breakdown of quantum-classical correspondence in chaotic systems.},
	url = {https://journals.aps.org/pre/abstract/10.1103/PhysRevE.97.052209},
	author = {Meenu Kumari and Shohini Ghose}
}
@article {13551,
	title = {Stabilizing quantum dynamics through coupling to a quantized environment},
	year = {2017},
	abstract = {We show that introducing a small uncertainty in the parameters of quantum systems can make the dynamics of these systems robust against perturbations. Concretely, for the case where a system is subject to perturbations due to an environment, we derive a lower bound on the fidelity decay, which increases with increasing uncertainty in the state of the environment. Remarkably, this robustness in fidelity can be achieved even in fragile chaotic systems. We show that non-Markovianity is necessary for attaining robustness in the fidelity.},
	url = {https://arxiv.org/abs/1711.07906},
	author = {Meenu Kumari and Eduardo Martin-Martinez and Achim Kempf and Shohini Ghose}
}
@article {13549,
	title = {Sufficient condition for nonexistence of symmetric extension of qudits using Bell inequalities},
	journal = {Phys. Rev. A},
	volume = {96},
	year = {2017},
	pages = {012128},
	abstract = {We analyze the connection between Bell inequality violations and symmetric extendibility of quantum states. We prove that 2-qubit reduced states of multiqubit symmetric pure states do not violate the Bell Clauser-Horne-Shimony-Holt (CHSH) inequality. We then prove the more general converse that any 2-qubit state that violates the CHSH inequality cannot have a symmetric extension. We extend our analysis to qudits and provide a test for symmetric extendibility of 2-qudit states. We show that if a 2-qudit Bell inequality is monogamous, then any 2-qudit state that violates this inequality does not have a symmetric extension. For the specific case of 2-qutrit states, we use numerical evidence to conjecture that the Collins-Gisin-Linden-Massar-Popescu (CGLMP) inequality is monogamous. Hence, the violation of the CGLMP inequality by any 2-qutrit state could be a sufficient condition for the nonexistence of its symmetric extension.},
	url = {https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.012128},
	author = {Meenu Kumari and Shohini Ghose and Robert B. Mann}
}
