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Two-step complete polarization logic Bell-state analysis

Yu-Bo Sheng, Lan Zhou
2015 Scientific Reports  
In this paper, we will describe an alternative approach to realize the near complete logic Bell-state analysis for the polarized concatenated Greenberger-Horne-Zeilinger (C-GHZ) state with two logic qubits  ...  For instance, with the help of the cross-Kerr nonlinearity, they can perform the near complete parity-check measurement (PCM) 13,17 .  ...  Such logic-qubit entanglement has the similar feature as the Greenberger-Horne-Zeiglinger (GHZ) state, but is more robust than the normal GHZ state in a noisy environment.  ... 
doi:10.1038/srep13453 pmid:26307327 pmcid:PMC4549687 fatcat:csd4hhn42ngtnmzfu7s7mtsxeu

Entanglement concentration for concatenated Greenberger-Horne-Zeiglinger state with feasible linear optics [article]

Yu-Bo Sheng, Chang-Cheng Qu, Lan Zhou
2016 arXiv   pre-print
The concatenated Greenberger-Horne-Zeiglinger (C-GHZ) state which is a new type of logic-qubit entanglement has attracted a lot of attentions recently.  ...  We present a feasible entanglement concentration protocol (ECP) for logic-qubit entanglement.  ...  In 2011, Fröwis et al. firstly put forward the concatenated Greenberger-Horne-Zeilinger (C-GHZ) state, which is a promising logic-qubit entanglement for quantum information processing [70] .  ... 
arXiv:1602.02331v1 fatcat:eilgj3ij3jbr7ndccypiafecji

Two-step complete polarization logic Bell-state analysis [article]

Yu-Bo Sheng, Lan Zhou
2014 arXiv   pre-print
Logic qubit entanglement, which is also called the concatenated Greenberger-Horne-Zeilinger (C-GHZ) state, is robust in practical noisy environment.  ...  We showed that the logic Bell-state can be distinguished in two steps with the help of the parity-check measurement (PCM), which is constructed by the cross-Kerr nonlinearity.  ...  For instance, with the help of the cross-Kerr nonlinearity, they can construct the quantum nondemolition measurement, such as the parity-check measurement (PCM) [21] .  ... 
arXiv:1407.3473v1 fatcat:erltvptmmfggpcbjilpghtgb6u

Bibliographic guide to the foundations of quantum mechanics and quantum information [article]

Adan Cabello
2004 arXiv   pre-print
Specifically, it covers hidden variables ("no-go" theorems, experiments), interpretations of quantum mechanics, entanglement, quantum effects (quantum Zeno effect, quantum erasure, "interaction-free" measurements  ...  Reprinted in [Macchiavello-Palma-Zeilinger 00], pp. 4-11.2838. [Greenberger-Horne-Zeilinger 94]: D. M. Greenberger, M. A. Horne, & A.  ...  69]). 4 . 4 Bell's inequalities for n particles [Greenberger-Horne-Shimony-Zeilinger 90] (Sec.  ... 
arXiv:quant-ph/0012089v12 fatcat:npzn2ah6fvd6bgmlwnh6xmcdl4

Linear optical quantum computing with photonic qubits

Pieter Kok, W. J. Munro, Kae Nemoto, T. C. Ralph, Jonathan P. Dowling, G. J. Milburn
2007 Reviews of Modern Physics  
Linear optics with photon counting is a prominent candidate for practical quantum computing.  ...  The protocol by Knill, Laflamme, and Milburn [Nature 409, 46 (2001)] explicitly demonstrates that efficient scalable quantum computing with single photons, linear optical elements, and projective measurements  ...  ACKNOWLEDGMENTS We would like to thank James Franson, Andrew White, Geoff Pryde, Philip Walther, and their coworkers for providing us with the experimental data of their respective CNOT gates.  ... 
doi:10.1103/revmodphys.79.135 fatcat:iiesmrbdcrawhjqwzz3eqyow6e

Quantum information with continuous variables

Samuel L. Braunstein, Peter van Loock
2005 Reviews of Modern Physics  
It may lead to real-world applications for communication and computation unavailable without the exploitation of quantum properties such as nonorthogonality or entanglement.  ...  We review the progress in quantum information based on continuous quantum variables, with emphasis on quantum optical implementations in terms of the quadrature amplitudes of the electromagnetic field.  ...  , ͉u n ͉͘v n ͘, ͑92͒ FIG. 1 . 1 Quantum circuit for generating the N-qubit Greenberger-Horne-Zeilinger ͑GHZ͒ state.  ... 
doi:10.1103/revmodphys.77.513 fatcat:5d2qoqk3frdzjdfwszarl3zqwy

Experiments on quantum frequency conversion of photons

Sven Ramelow
2011 unpublished
In our experiments, we verify the successful entanglement conversion by violating a Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and fully characterised our close to unity fidelity entanglement transfer  ...  It can provide valuable photonic quantum processing tools, from scal- ably creating single- and multi-photon states to implementing deterministic entangling gates and high-efficiency detection.  ...  Zeilinger, for the unique opportunity to carry out the research that led to this thesis in his group.  ... 
doi:10.25365/thesis.18769 fatcat:lv7bcycbmrevtgxsfogjanuan4

Experimental all-optical one-way quantum computing

Robert Prevedel
2009 unpublished
This entangled state acts as a resource that allowed for novel demonstrations of quantum algorithms and relevant experimental techniques.  ...  For this purpose a multi-photon entangled state of four photons has been generated via the process of spontaneous parametric down-conversion and by using an interferometric setup.  ...  Acknowledgements for his help in organizing the students conference and for throwing the best parties in town, Rupert Ursin for teaching me the basics of experimental quantum optics and for the wonderful  ... 
doi:10.25365/thesis.4741 fatcat:ji3u3vxwtfelrjokwhd7icalse

Towards practical linear optical quantum computing

Mercedes Gimeno-Segovia, Dan E. Browne, Jeremy L. O'Brien, Terry Rudolph, Engineering And Physical Sciences Research Council, Obra Social "LaCaixa"
For the state preparation, we propose a series of linear optical circuits for the generation of small entangled states, assessing their performance under different scenarios.  ...  We make investigations into the resource efficiency of this architecture and propose a new multiplexing scheme which optimises the use of resources.  ...  This scheme relies on the ability to prepare small entangled states such as Bell pairs and Greenberger-Horne-Zeilinger (GHZ) states [1] and perform deterministic Bell measurements.  ... 
doi:10.25560/43936 fatcat:gury773ctba55bbiezbjfghtga