Multiphoton Interference as a Tool to Observe Families of Multiphoton Entangled States
| Autor: | Harald Weinfurter, Marek Zukowski, Witlef Wieczorek, Christian Schmid, Wiesław Laskowski, Nikolai Kiesel |
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| Rok vydání: | 2009 |
| Předmět: |
Quantum optics
Physics Photon business.industry Nonlinear optics Observable Quantum Physics Quantum entanglement Interference (wave propagation) Atomic and Molecular Physics and Optics law.invention Optics law Quantum mechanics Physics::Atomic Physics Electrical and Electronic Engineering business Beam splitter Quantum computer |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 15:1704-1712 |
| ISSN: | 1558-4542 1077-260X |
| DOI: | 10.1109/jstqe.2009.2025697 |
| Popis: | Spontaneous parametric downconversion in combination with linear optics was successfully used to observe a variety of multiphoton entangled states. Yet, experiments performed so far lacked flexibility, as each of the various setups was useful for only a particular multiphoton entangled state. In this paper, we describe how, by using multiphoton interference, one can observe entire families of multiphoton entangled states in the very same linear optical setup. Our method thus goes beyond the commonly used two-photon interference and turns out to be a very useful tool for state observation. We will discuss the interference of four and six photons at different types of beam splitters and show which families of entangled states are observable. The benefits of this approach are demonstrated in a four-photon interference experiment by observing a variety of highly entangled multiphoton states. |
| Databáze: | OpenAIRE |
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