- Resource Types
- Resource Languages
- Institutional Repository
About Site Language
WHDL is viewable in multiple languages. Use the pull-down menu to select a language to view the site.
I changed my language, but I’m still seeing resources in the other languages?
If a resource or text has not been translated into your selected language, it will appear in the initially added language. We are always looking for help translating these resources. If you can help, contact us!
WHDL - 00011868
A new type of quantum eraser using hyperentangled photon pairs is proposed. Whereas a typical quantum eraser makes use of photons that are entangled in a single quantum state, usually in polarization, our new quantum eraser exploits entanglements in both polarization and momentum states. In a typical quantum eraser one gains "which- path" information of one photon by changing the polarization measurement of the other. This results in "erasing" the interference pattern previously obtained through indistinguishably of paths. In our new quantum eraser we gain information about the momentum state of one photon by changing the polarization of the other photon in one of its momentum states. The knowledge of the momentum state then "erases" the interference pattern previously obtained in the coincident counts of the photon pairs. This new quantum eraser may readily be implemented using photon pairs produced by Type-I Parametric Down Conversion. To achieve extra entanglement in momentum states, we simply subject them to pass through two distinguishable sets of pinholes and then recombine them before they reach polarization detectors.