Send to

Choose Destination
Phys Rev Lett. 2005 Dec 31;95(26):260501. Epub 2005 Dec 19.

Generation of hyperentangled photon pairs.

Author information

Department of Physics, University of Illinois at Urbana-Champaign, 61801-3080, USA.


We experimentally demonstrate the first quantum system entangled in every degree of freedom (hyperentangled). Using pairs of photons produced in spontaneous parametric down-conversion, we verify entanglement by observing a Bell-type inequality violation in each degree of freedom: polarization, spatial mode, and time energy. We also produce and characterize maximally hyperentangled states and novel states simultaneously exhibiting both quantum and classical correlations. Finally, we report the tomography of a 2 x 2 x 3 x 3 system (36-dimensional Hilbert space), which we believe is the first reported photonic entangled system of this size to be so characterized.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center