Experimental Realization of Decoherence-Free Subspace in Neutron Interferometry
Author(s)Huber, Michael G.; Arif, M.; Pushin, D. A.; Cory, David G.
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A decoherence-free subspace (DFS) is an important class of quantum-error-correcting (QEC) codes that have been proposed for fault-tolerant quantum computation. The applications of QEC techniques, however, are not limited to quantum-information processing (QIP). Here we demonstrate how QEC codes may be used to improve experimental designs of quantum devices to achieve noise suppression. In particular, neutron interferometry is used as a test bed to show the potential for adding quantum error correction to quantum measurements. We built a five-blade neutron interferometer that incorporates both a standard Mach-Zender configuration and a configuration based on a DFS. Experiments verify that the DFS interferometer is protected against low-frequency mechanical vibrations. We anticipate these improvements will increase the range of applications for matter-wave interferometry.
DepartmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineering
Physical Review Letters
American Physical Society (APS)
Pushin, D. et al. “Experimental Realization of Decoherence-Free Subspace in Neutron Interferometry.” Physical Review Letters 107.15 (2011): n. pag. Web. 9 Feb. 2012. © 2011 American Physical Society
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