Physics – Quantum Physics
Scientific paper
2005-07-13
Phys. Rev. Lett. 95, 260501 (2005)
Physics
Quantum Physics
5 pages, 3 figures, 1 table, published version
Scientific paper
10.1103/PhysRevLett.95.260501
We experimentally demonstrate the first quantum system entangled in every degree of freedom (hyperentangled). Using pairs of photons produced in spontaneous parametric downconversion, 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 2x2x3x3 system (36-dimensional Hilbert space), which we believe is the first reported photonic entangled system of this size to be so characterized.
Barreiro Julio T.
Kwiat Paul G.
Langford Nathan K.
Peters Nicholas A.
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