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Showing 2013 · quant-phShow all

12 papers · 2 filters

quant-ph2013★ 176 cited

Quantum speed limit for arbitrary initial states

Yingjie Zhang, Wei Han, Yunjie Xia +2

We investigate the generic bound on the minimal evolution time of the open dynamical quantum system. This quantum speed limit time is applicable to both mixed and pure initial stat…

quant-ph2013★ 11 cited

The general fine-grained uncertainty relation and the second law of thermodynamics

Li-Hang Ren, Heng Fan

We investigate the fine-grained uncertainty relations for qubit system by measurements corresponding respectively to two and three spin operators. Then we derive the general bound…

quant-ph2013★ 3 cited

Classification of no-signaling correlations and the guess your neighbor's input game

He-Ming Wang, Heng-Yun Zhou, Liang-Zhu Mu +1

We formulate a series of non-trivial equalities which are satisfied by all no-signaling correlations, meaning that no faster-than-light communication is allowed with the resource o…

quant-ph2013★ 2 cited

Quantum Metrology via Repeated Quantum Nondemolition Measurements in "Photon Box"

Yu-Ran Zhang, Jie-Dong Yue, Heng Fan

In quantum metrology schemes, one generally needs to prepare copies of entangled particles, such as entangled photon states, and then they are detected in a destructive pro…

quant-ph2013★ 87 cited

Quantum-enhanced metrology for multiple phase estimation with noise

Jie-Dong Yue, Yu-Ran Zhang, Heng Fan

We present a general framework to study the simultaneous estimation of multiple phases in the presence of noise as a discretized model for phase imaging. This approach can lead to…

quant-ph2013★ 16 cited

Equilibration of quantum chaotic systems

Quntao Zhuang, Biao Wu

Quantum ergordic theorem for a large class of quantum systems was proved by von Neumann [Z. Phys. {\bf 57}, 30 (1929)] and again by Reimann [Phys. Rev. Lett. {\bf 101}, 190403 (200…

quant-ph2013★ 40 cited

General monogamy property of global quantum discord and the application

Si-Yuan Liu, Yu-Ran Zhang, Li-Ming Zhao +2

We provide a family of general monogamy inequalities for global quantum discord (GQD), which can be considered as an extension of the usual discord monogamy inequality. It can be s…

quant-ph2013★ 43 cited

Effective Photon-Photon Interactions in Largely Detuned Optomechanics

Hao-Kun Li, Xue-Xin Ren, Yong-Chun Liu +1

We propose to realize effective beam-splitter-like and two-mode-squeezing photon-photon interactions in a strong coupling optomechanical interface by exploiting detuned driving las…

quant-ph2013★ 28 cited

Zeno dynamics in quantum open systems

Yu-Ran Zhang, Heng Fan

Quantum Zeno effect shows that frequent observations can slow down or even stop the unitary time evolution of an unstable quantum system. This effect can also be regarded as a phys…

quant-ph2013★ 19 cited

Protection of center-spin coherence by dynamically polarizing nuclear spin core in diamond

Gang-Qin Liu, Qian-Qing Jiang, Yan-Chun Chang +7

We experimentally investigate the protection of electron spin coherence of nitrogen vacancy (NV) center in diamond by dynamical nuclear polarization. The electron spin decoherence…

quant-ph2013★ 27 cited

Coherent Destruction of Tunneling and Dark Floquet State

Xiaobing Luo, Liping Li, Li You +1

We study a system of three coherently coupled states, where one state is shifted periodically against the other two. We discover such a system possesses a dark Floquet state at zer…

quant-ph2013★ 119 cited

Quantum Cloning Machines and the Applications

Heng Fan, Yi-Nan Wang, Li Jing +4

No-cloning theorem is fundamental for quantum mechanics and for quantum information science that states an unknown quantum state cannot be cloned perfectly. However, we can try to…