25.40.+t Automated state and process tomography

Tomography of photon-number resolving continuous-output detectors

Date: 
2015-02-26
Author(s): 

Peter C. Humphreys,1 Benjamin J. Metcalf,1 Thomas Gerrits,2 Thomas Hiemstra,1 Adriana E. Lita,2 Joshua Nunn,1 Sae Woo Nam,2 Animesh Datta,1 W. Steven Kolthammer,1 and Ian A. Walmsley

Reference: 

arXiv:1502.07649v1

Mapping coherence in measurement: Full quantum tomography of a hybrid optical detector

Date: 
2012-02-06
Author(s): 

Lijian Zhang, Hendrik Coldenstrodt-Ronge, Animesh Datta, Graciana Puentes, Jeff S. Lundeen, Xian-Min Jin, Brian J. Smith, Martin B. Plenio, and Ian A. Walmsley

Reference: 

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Quantum states and measurements exhibit wave-like - continuous, or particle-like - discrete, character. Hybrid discrete-continuous quantum optical systems are key to investigating fundamental quantum phenomena such as the violation of local realism by Einstein-Podolsky-Rosen states, measuring non-classical correlations of radiation fields and superpositions of macroscopic states, and form essential resources for quantum-enhanced applications and high- efficient optical telecommunications.

Efficient quantum state tomography

Date: 
2010-12-21
Author(s): 

Marcus Cramer, Martin B. Plenio, Steven T. Flammia, Rolando Somma, David Gross, Stephen D. Bartlett, Olivier Landon-Cardinal, David Poulin and Yi-Kai Liu

Reference: 

Nat. Commun. 1, 149 (2010)
doi:10.1038/ncomms1147

Quantum state tomography—deducing quantum states from measured data—is the gold standard for verification and benchmarking of quantum devices. It has been realized in systems with few components, but for larger systems it becomes unfeasible because the number of measurements and the amount of computation required to process them grows exponentially in the system size. Here, we present two tomography schemes that scale much more favourably than direct tomography with system size.

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