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Phys Rev Lett. 2014 Mar 28;112(12):120505. Epub 2014 Mar 26.

Experimental realization of multipartite entanglement of 60 modes of a quantum optical frequency comb.

Author information

1
Department of Physics, University of Virginia, Charlottesville, Virginia 22903, USA.
2
School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.

Abstract

We report the experimental realization and characterization of one 60-mode copy and of two 30-mode copies of a dual-rail quantum-wire cluster state in the quantum optical frequency comb of a bimodally pumped optical parametric oscillator. This is the largest entangled system ever created whose subsystems are all available simultaneously. The entanglement proceeds from the coherent concatenation of a multitude of Einstein, Podolsky, and Rosen pairs by a single beam splitter, a procedure which is also a building block for the realization of hypercubic-lattice cluster states for universal quantum computing.

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