Projects per year
Abstract
Generating and characterizing randomness is fundamentally important in both classical and quantum information science. Here we report the experimental demonstration of ensembles of pseudorandom optical processes comprising what are known as tdesigns. We show that in practical scenarios, certain finite ensembles of twomode transformations—1 and 2designs—are indistinguishable from truly random operations for 1 and 2photon quantum interference, but they fail to mimic randomness for 2 and 3photon cases, respectively. We make use of the fact that tphoton behavior is governed by degree2t polynomials (in the parameters of the optical process), to experimentally verify the ensembles' behavior for complete bases of polynomials, ensuring that average outputs will be uniform for arbitrary configurations. It is in this sense that a tdesign is deemed to be a potentially useful pseudorandom resource.
Original language  English 

Journal  Physical Review A: Atomic, Molecular and Optical Physics 
Volume  91 
Issue number  2 
DOIs  
Publication status  Published  17 Feb 2015 
Structured keywords
 QETLabs
 Bristol Quantum Information Institute
Keywords
 Quantum optics
 tdesigns
 Random Matrix Theory
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Dive into the research topics of 'Testing randomness with photons by direct characterization of optical tdesigns'. Together they form a unique fingerprint.Projects
 4 Finished


Programme Grant: Engineering Photonic Quantum Technologies.
Rarity, J. G., O'Brien, J. L., Thompson, M. G., Erven, C., Sahin, D., Marshall, G. D., Barreto, J., Jiang, P., McCutcheon, W. D., Silverstone, J. W., Sinclair, G. F., Kling, L., Banerjee, A., Wang, J., Santagati, R., Borghi, M., Woodland, E. M., Mawdsley, H. C. M. & Faruque, I. I.
16/06/14 → 15/06/19
Project: Research, Parent
