Entanglement and interference between different degrees of freedom of photon states
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Article number | 063805 |
| Journal / Publication | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 76 |
| Issue number | 6 |
| Publication status | Published - 11 Dec 2007 |
| Externally published | Yes |
Link(s)
Abstract
In this paper, photonic entanglement and interference are described and analyzed with the language of quantum information processing. Correspondingly, a photon state involving several degrees of freedom is represented in an expression based on the permutation symmetry of bosons. In this expression, each degree of freedom of a single photon is regarded as a qubit and operations on photons as qubit gates. The two-photon Hong-Ou-Mandel interference is well interpreted with it. Moreover, the analysis reveals the entanglement between different degrees of freedom in a four-photon state from parametric down conversion, even if there is no entanglement between them in the two-photon state. The entanglement will decrease the state purity and photon interference visibility in the experiments on a four-photon polarization state. © 2007 The American Physical Society.
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Citation Format(s)
Entanglement and interference between different degrees of freedom of photon states. / Sun, F. W.; Liu, B. H.; Huang, Y. F. et al.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 76, No. 6, 063805, 11.12.2007.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
