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10 September 2007 Experimental generation of optical "Schrödinger cats" from photon number states
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Proceedings Volume 6780, Quantum Communications Realized; 678010 (2007)
Event: Optics East, 2007, Boston, MA, United States
A "Schrödinger cat" state of free-propagating light can be defined as a quantum superposition of well separated coherent states. 1, 2 We demonstrated, theoretically and experimentally, a protocol which allows to generate arbitrarily large squeezed Schrödinger cat states, using a homodyne detection and photon number states as resources. We implemented this protocol experimentally with light pulses containing two photons, producing a squeezed Schrödinger cat state with a negative Wigner function. This state clearly presents several quantum phase-space interference fringes between the "dead" and "alive" components, and it is large enough to become useful for experimental tests of quantum theory and quantum information processing.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexei Ourjoumtsev, Hyunseok Jeong, Rosa Tualle-Brouri, and Philippe Grangier "Experimental generation of optical "Schrödinger cats" from photon number states", Proc. SPIE 6780, Quantum Communications Realized, 678010 (10 September 2007);


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