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General coarsened measurement references for revelation of a classical world |
| Dong Xie(谢东)1, Chunling Xu(徐春玲)1, Anmin Wang(王安民)2 |
1 National Earthquake Infrastructure Service, China Earthquake Administration, Beijing 100045, China;
2 Institute of High Energy Physics, Chinese Academic Sciences, Beijing 100049, China;
3 Peking University, Beijing 100871, China;
4 Department of Physics, University of Texas at Dallas, Richardson, Texas, USA |
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Abstract It has been found that for a fixed degree of fuzziness in the coarsened references of measurements, the quantum-to-classical transition can be observed independent of the macroscopicity of the quantum state. We explore a general situation that the degree of fuzziness can change with the rotation angle between two states (different rotation angles represent different references). The fuzziness of reference comes from two kinds of fuzziness:the Hamiltonian (rotation frequency) and the timing (rotation time). For the fuzziness of the Hamiltonian alone, the degree of fuzziness for the reference will change with the rotation angle between two states, and the quantum effects can still be observed with any degree of fuzziness of Hamiltonian. For the fuzziness of timing, the degree of the coarsening reference is unchanged with the rotation angle. During the rotation of the measurement axis, the decoherence environment can also help the classical-to-quantum transition due to changing the direction of the measurement axis.
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Received: 17 June 2016
Revised: 13 July 2016
Accepted manuscript online:
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PACS:
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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42.50.Dv
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(Quantum state engineering and measurements)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11375168). |
Corresponding Authors:
Dong Xie
E-mail: xiedong@mail.ustc.edu.cn
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Cite this article:
Dong Xie(谢东), Chunling Xu(徐春玲), Anmin Wang(王安民) General coarsened measurement references for revelation of a classical world 2016 Chin. Phys. B 25 110302
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