Non-Gaussian states of light as an offline resource for universal continuous variable quantum information processing

2005 ◽  
Author(s):  
Shohini Ghose ◽  
Barry C. Sanders
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Continuous Variable ◽  
Gaussian States ◽  
Non Gaussian

scholarly journals Quantum mode filtering of non-Gaussian states for teleportation-based quantum information processing

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
Shuntaro Takeda ◽  
Hugo Benichi ◽  
Takahiro Mizuta ◽  
Noriyuki Lee ◽  
Jun-ichi Yoshikawa ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Gaussian States ◽  
Non Gaussian

scholarly journals Generating superposition of up-to three photons for continuous variable quantum information processing

2013 ◽  
Vol 21 (5) ◽  
pp. 5529 ◽  
Author(s):  
Mitsuyoshi Yukawa ◽  
Kazunori Miyata ◽  
Takahiro Mizuta ◽  
Hidehiro Yonezawa ◽  
Petr Marek ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Continuous Variable

Quantum non-gaussianity from an indefnite causal order of Gaussian operations

2021 ◽  
Author(s):  
Seid Koudia ◽  
Abdelhakim Gharbi
Keyword(s):  
Quantum Information ◽  
Quantum Key Distribution ◽  
Degrees Of Freedom ◽  
Quantum Communication ◽  
Quantum Information Processing ◽  
Quantum Metrology ◽  
Causal Order ◽  
Gaussian States ◽  
Control Qubit ◽  
Non Gaussian

Quantum non-Gaussian states are considered a useful resource for many tasks in quantum information processing, from quantum metrology and quantum sensing to quantum communication and quantum key distribution. Another useful tool that is gaining attention is the newly constructed quantum switch. Its applications in many tasks in quantum information have been proved to outperform many existing schemes in quantum communication and quantum thermometry. In this contribution, we demonstrate this to be very useful for engineering highly non-Gaussian states from Gaussian operations whose order is controlled by degrees of freedom of a control qubit. The nonconvexity of the set of Gaussian states and the set of Gaussian operations guarantees the emergence of non-Gaussianity after post-selection on the control qubit deterministically, in contrast to existing protocols in the literature. The nonclassicality of the resulting states is discussed accordingly.

scholarly journals Continuous Variable Quantum Information: Gaussian States and Beyond

2014 ◽  
Vol 21 (01n02) ◽  
pp. 1440001 ◽  
Author(s):  
Gerardo Adesso ◽  
Sammy Ragy ◽  
Antony R. Lee
Keyword(s):  
Quantum Information ◽  
Symplectic Geometry ◽  
Quantum Information Processing ◽  
Mathematical Structure ◽  
Continuous Variable ◽  
Gaussian State ◽  
Mathematical Framework ◽  
Gaussian States ◽  
Subject Material ◽  
Selection Of

The study of Gaussian states has arisen to a privileged position in continuous variable quantum information in recent years. This is due to vehemently pursued experimental realisations and a magnificently elegant mathematical framework. In this paper, we provide a brief, and hopefully didactic, exposition of Gaussian state quantum information and its contemporary uses, including sometimes omitted crucial details. After introducing the subject material and outlining the essential toolbox of continuous variable systems, we define the basic notions needed to understand Gaussian states and Gaussian operations. In particular, emphasis is placed on the mathematical structure combining notions of algebra and symplectic geometry fundamental to a complete understanding of Gaussian informatics. Furthermore, we discuss the quantification of different forms of correlations (including entanglement and quantum discord) for Gaussian states, paying special attention to recently developed measures. The paper is concluded by succinctly expressing the main Gaussian state limitations and outlining a selection of possible future lines for quantum information processing with continuous variable systems.

Demonstration of Dynamic Squeezing Gate for Continuous-Variable Quantum Information Processing

2014 ◽  
Author(s):  
Hisashi Ogawa ◽  
Kazunori Miyata ◽  
Hidehiro Yonezawa ◽  
Petr Marek ◽  
Radim Filip ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Continuous Variable

scholarly journals Continuous-variable quantum information processing

2009 ◽  
Vol 4 (3) ◽  
pp. 337-354 ◽  
Author(s):  
U.L. Andersen ◽  
G. Leuchs ◽  
C. Silberhorn
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Continuous Variable

scholarly journals Generation and eight-port homodyne characterization of time-bin qubits for continuous-variable quantum information processing

2013 ◽  
Vol 87 (4) ◽  
Author(s):  
Shuntaro Takeda ◽  
Takahiro Mizuta ◽  
Maria Fuwa ◽  
Jun-ichi Yoshikawa ◽  
Hidehiro Yonezawa ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Continuous Variable
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