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Nonclassical Properties of Superposition of Two Coherent States Shifted in Phase by 3π/2 |
| AHMAD Muhammad Ashfaq;ZENG Ran;LIU Shu-Tian |
| Department of Physics, Harbin Institute of Technology, Harbin 150001 |
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| Cite this article: |
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AHMAD Muhammad Ashfaq, ZENG Ran, LIU Shu-Tian 2006 Chin. Phys. Lett. 23 2438-2441 |
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Abstract We consider the quantum superposition of two coherent states shifted in phase by 3π/2, |α> and |-iα>, as well as special states that are characterized solely with respect to amplitude α. According to analysis of nonclassical properties such as oscillatory and sub-Poissonian distribution of photon numbers, photon antibunching, quadrature squeezing, and negativity of Wigner function, it is concluded that the considered superposition state is a nonclassical state. Also, the special state is found to exhibit even stronger onclassical features when relative phase Ф of the superposition is equal to the average photon number |α|2.
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42.50.Dv
42.50.-p
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Published: 01 September 2006
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| PACS: |
42.50.Dv
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(Quantum state engineering and measurements)
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42.50.-p
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(Quantum optics)
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