Leggett-Garg inequalities: distinguishing quantum and classical dynamics
(when the Leggett–Garg inequality is violated, the time evolution of a system cannot be classical, in the macrorealist sense)
N. Lambert, C. Emary, Y.N. Chen, F. Nori
Distinguishing quantum and classical transport through nanostructures
Phys. Rev. Lett. 105, 176801 (2010). [PDF][Link][arXiv]N. Lambert, Y.N.Chen, F. Nori
Unified single-photon and single-electron counting statistics: From cavity QED to electron transport
Phys. Rev. A 82, 063840 (2010). [PDF][Link][arXiv]N. Lambert, J.R. Johansson, F. Nori
Macrorealism inequality for optoelectromechanical systems
Phys. Rev. B 84, 245421 (2011). [PDF][Link][arXiv]G.Y. Chen, N. Lambert, C.M. Li, Y.N. Chen, F. Nori
Delocalized single-photon Dicke states and the Leggett-Garg inequality in solid state systems
Scientific Reports 2, 869 (2012). [PDF][Link][arXiv][Errata]C.M. Li, N. Lambert, Y.N. Chen, G.Y. Chen, F. Nori
Witnessing Quantum Coherence: from solid-state to biological systems
Scientific Reports 2, 885 (2012). [PDF][Link][arXiv]C. Emary, N. Lambert, F. Nori
Leggett-Garg inequality in electron interferometers
Phys. Rev. B 86, 235447 (2012). [PDF][Link][arXiv]C. Emary, N. Lambert, F. Nori
Leggett-Garg Inequalities
Reports on Progress in Physics 77, 016001 (2014). [PDF][Link][arXiv][Errata]N. Lambert, K. Debnath, A.F. Kockum, G.C. Knee, W.J. Munro, F. Nori
Leggett-Garg inequality violations with a large ensemble of qubits
Phys. Rev. A 94, 012105 (2016). [PDF][Link][arXiv]K.D. Wu, Z. Hou, G.Y. Xiang, C.F. Li, G.C. Guo, D. Dong, F. Nori
Detecting non-Markovianity via quantified coherence: theory and experiments
npj Quantum Information 6, 55 (2020). [PDF][Link_1][Link_2][arXiv][Suppl. Info.]H.Y. Ku, N. Lambert, F.J. Chan, C. Emary, Y.N. Chen, F. Nori
Experimental test of non-macrorealistic cat states in the cloud
npj Quantum Information 6, 98 (2020). [PDF][Link_1][Link_2][arXiv]H.Y. Ku, H.C. Weng, Y.A. Shih, P.C. Kuo, N. Lambert, F. Nori, C.S. Chuu, Y.N. Chen
Hidden nonmacrorealism: Reviving the Leggett-Garg inequality with stochastic operations
Phys. Rev. Research 3, 043083 (2021). [PDF][Link][arXiv]H.Y. Ku, J. Kadlec, A. Cernoch, M.T. Quintino, W. Zhou, K. Lemr, N. Lambert, A. Miranowicz, S.L. Chen, F. Nori, Y.N. Chen
Quantifying Quantumness of Channels Without Entanglement
PRX Quantum 3, 020338 (2022). [PDF][Link][arXiv]
Quantum Steering (spatial and temporal)
(Quantum steering refers to the ability to perform a measurement on one side of an entangled system with different outcomes leading to different sets of states for another part of the entangled system arbitrarily far away. This purely quantum phenomena has no classical analogue. It is closely related to entanglement and Bell nonlocality. Temporal steering refers to steering a single system in time, and is partly inspired by the Leggett-Garg inequality, and its relationship to the Bell Inequality)
Y.N. Chen, C.M. Li, N. Lambert, S.L. Chen, Y. Ota, G.Y. Chen, F. Nori
Temporal steering inequality
Phys. Rev. A 89, 032112 (2014). [PDF][Link][arXiv]C.M. Li, Y.N. Chen, N. Lambert, C.Y. Chiu, F. Nori
Certifying single-system steering for quantum-information processing
Phys. Rev. A 92, 062310 (2015). [PDF][Link][arXiv]S.L. Chen, N. Lambert, C.M. Li, A. Miranowicz, Y.N. Chen, F. Nori
Quantifying Non-Markovianity with Temporal Steering
Phys. Rev. Lett. 116, 020503 (2016). [PDF][Link][arXiv][Suppl. Info.]C.Y. Chiu, N. Lambert, T.L. Liao, F. Nori, C.M. Li
No-cloning of quantum steering
npj Quantum Information 2, 16020 (2016). [PDF][Link][Link][arXiv]K. Bartkiewicz, A. Černoch, K. Lemr, A. Miranowicz, F. Nori
Temporal steering and security of quantum key distribution with mutually unbiased bases against individual attacks
Phys. Rev. A 93, 062345 (2016). [PDF][Link][arXiv]K. Bartkiewicz, A. Černoch, K. Lemr, A. Miranowicz, F. Nori
Experimental temporal quantum steering
Scientific Reports 6, 38076 (2016). [PDF][Link][arXiv]H.Y. Ku, S.L. Chen, H.B. Chen, N. Lambert, Y.N. Chen, F. Nori
Temporal steering in four dimensions with applications to coupled qubits and magnetoreception
Phys. Rev. A 94, 062126 (2016). [PDF][Link][arXiv]S.L. Chen, N. Lambert, C.M. Li, G.Y. Chen, Y.N. Chen, A. Miranowicz, F. Nori
Spatio-Temporal Steering for Testing Nonclassical Correlations in Quantum Networks
Scientific Reports 7, 3728 (2017). [PDF][Link][arXiv]H.Y. Ku, S.L. Chen, N. Lambert, Y.N. Chen, F. Nori
Hierarchy in temporal quantum correlations
Phys. Rev. A 98, 022104 (2018). [PDF][Link][arXiv]C.Y. Huang, N. Lambert, C.M. Li, Y.T. Lu, F. Nori
Securing quantum networking tasks with multipartite Einstein-Podolsky-Rosen steering
Phys. Rev. A 99, 012302 (2019). [PDF][Link][arXiv]
J.D. Lin, W.Y. Lin, H.Y. Ku, N. Lambert, Y.N. Chen, F. Nori
Quantum steering as a witness of quantum scrambling
Phys. Rev. A 104, 022614 (2021). [PDF][Link][arXiv]K.Y. Lee, J.D. Lin, A. Miranowicz, F. Nori, H.Y. Ku, Y.N. Chen
Steering-enhanced quantum metrology using superpositions of noisy phase shifts
Phys. Rev. Research 5, 013103 (2023). [PDF][Link][arXiv]