1.
Phys Rev Lett
; 108(16): 163602, 2012 Apr 20.
Article
in English
| MEDLINE
| ID: mdl-22680718
ABSTRACT
We have measured quantum interference between two single microwave photons trapped in the same superconducting resonator, whose frequencies are initially about 6 GHz apart. We accomplish this by use of a parametric frequency conversion process that mixes the mode currents of two cavity harmonics through a superconducting quantum interference device, and demonstrate that a two-photon entanglement operation can be performed with high fidelity.