dorsal/arxiv
View SchemaGeneration of polarization-entangled photon pairs in a cascade of two type-I crystals pumped by femtosecond pulses
| Authors | Y. Nambu, K. Usami, Y. Tsuda, K. Matsumoto, K. Nakamura |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0203115 |
| URL | https://arxiv.org/abs/quant-ph/0203115 |
| DOI | 10.1103/PhysRevA.66.033816 |
| Journal | Phys. Rev. A 66, 033816 (2002) |
Abstract
We report the generation of polarization-entangled photons by femtosecond-pulse-pumped spontaneous parametric down-conversion in a cascade of two type-I crystals. Highly entangled pulsed states were obtained by introducing a temporal delay between the two orthogonal polarization components of the pump field. They exhibited high-visibility quantum interference and a large concurrence value, without the need of post-selection using narrow-bandwidth-spectral filters. The results are well explained by the theory which incorporates the space-time dependence of interfering two-photon amplitudes if dispersion and birefringence in the crystals are appropriately taken into account. Such a pulsed entangled photon well localized in time domain is useful for various quantum communication experiments, such as quantum cryptography and quantum teleportation.
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"abstract": "We report the generation of polarization-entangled photons by\nfemtosecond-pulse-pumped spontaneous parametric down-conversion in a cascade of\ntwo type-I crystals. Highly entangled pulsed states were obtained by\nintroducing a temporal delay between the two orthogonal polarization components\nof the pump field. They exhibited high-visibility quantum interference and a\nlarge concurrence value, without the need of post-selection using\nnarrow-bandwidth-spectral filters. The results are well explained by the theory\nwhich incorporates the space-time dependence of interfering two-photon\namplitudes if dispersion and birefringence in the crystals are appropriately\ntaken into account. Such a pulsed entangled photon well localized in time\ndomain is useful for various quantum communication experiments, such as quantum\ncryptography and quantum teleportation.",
"arxiv_id": "quant-ph/0203115",
"authors": [
"Y. Nambu",
"K. Usami",
"Y. Tsuda",
"K. Matsumoto",
"K. Nakamura"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.66.033816",
"journal_ref": "Phys. Rev. A 66, 033816 (2002)",
"title": "Generation of polarization-entangled photon pairs in a cascade of two type-I crystals pumped by femtosecond pulses",
"url": "https://arxiv.org/abs/quant-ph/0203115"
},
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