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11 papers · 2 filters
Witnessing Quantum Coherence: from solid-state to biological systems
Che-Ming Li, Neill Lambert, Yueh-Nan Chen +2
Quantum coherence is one of the primary non-classical features of quantum systems. While protocols such as the Leggett-Garg inequality (LGI) and quantum tomography can be used to t…
Two-photon and three-photon blockades in driven nonlinear systems
Adam Miranowicz, Malgorzata Paprzycka, Yu-xi Liu +2
Photon blockade, in analogy to Coulomb's or phonon blockades, is a phenomenon when a single photon in a nonlinear cavity blocks the transmission of a second photon. This effect can…
Fisher information under decoherence in Bloch representation
Wei Zhong, Zhe Sun, Jian Ma +2
The dynamics of two variants of quantum Fisher information under decoherence are investigated from a geometrical point of view. We first derive the explicit formulas of these two q…
QuTiP 2: A Python framework for the dynamics of open quantum systems
J. R. Johansson, P. D. Nation, Franco Nori
We present version 2 of QuTiP, the Quantum Toolbox in Python. Compared to the preceding version [Comput. Phys. Comm. 183 (2012) 1760], we have introduced numerous new features, enh…
Spectral Analysis and Identification of Noises in Quantum Systems
Re-Bing Wu, Tie-Fu Li, A. G. Kofman +5
In quantum information processing, knowledge of the noise in the system is crucial for high-precision manipulation and tomography of coherent quantum operations. Existing strategie…
State-independent experimental tests of quantum contextuality in a three dimensional system
Xiang Zhang, Mark Um, Junhua Zhang +6
We experimentally observed state-independent violations of Kochen-Specker inequalities for the simplest indivisible quantum system manifesting quantum contextuality, a three-level…