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Volume 121, Issue 9, 01 September 2004
121(2004); http://dx.doi.org/10.1063/1.1788661View Description Hide Description
It is experimentally demonstrated that entangled quantum states can be used to amplify perturbations and to increase changes in observable values. The physical system is seven nuclear spins of single-labeled -benzene in a liquid crystalline matrix. An entangled state of six proton spins was used to monitor interaction with the spin.