Abstract
The quantum state of the photon pair generated from type-II spontaneous parametric down-conversion pumped by a ultrafast laser pulse exhibits strong decoherence in its polarization entanglement, an effect which can be attributed to the clock effect of the pump pulse or, equivalently, to distinguishing spectral information in the two-photon state. Here, we discuss novel spectral engineering techniques to eliminate these detrimental decoherence effects. In addition, spectral engineering provides a means for generating polarization entangled states with novel spectral characteristics: the frequency-correlated state and the frequency-uncorrelated state. Such states may find usefulness in experimental quantum information science and quantum metrology applications.
Original language | English |
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Pages (from-to) | 364-372 |
Number of pages | 9 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 4821 |
DOIs | |
State | Published - 2002 |
Event | Free-Space Laser Communication and Laser Imaging II - Seattle, WA, United States Duration: Jul 9 2002 → Jul 11 2002 |
Keywords
- Joint spectrum
- Quantum entanglement
- Spontaneous parametric down conversion