Generation and detection of photonic qutrit states by linear optics

2008 ◽  
Vol 8 (5) ◽  
pp. 386-398
Author(s):  
Y.-T. Chen ◽  
G. Bjork
Keyword(s):  
Linear Polarization ◽  
Simultaneous Detection ◽  
Mutually Unbiased Bases ◽  
High Fidelity ◽  
Linear Optics ◽  
Complete Basis ◽  
Analytical Results ◽  
Polarization Optics ◽  
Unbiased Basis

We address the problem of generation and detection of the four mutually unbiased biphoton polarization-qutrit bases by linear optics. First, the generation of the bases is studied. Our numeric results show that the linear optics method can be used to generate the 4 mutually unbiased basis qutrit states probabilistically with high fidelity. Second, we investigate whether or not linear polarization-optics components are sufficient to realize the simultaneous detection of the qutrit states forming a complete basis. Analytical results show that every state in two of the bases, namely only half of the 4 mutually unbiased bases qutrit states can be identified.

scholarly journals Development of multiplex reverse transcription polymerase chain reaction (RT-PCR) for simultaneous detection of matrix, haemagglutinin and neuraminidase genes of H5N1 avian influenza virus

2012 ◽  
Vol 28 (2) ◽  
pp. 55-59 ◽  
Author(s):  
R. Mojumder ◽  
E. H. Chowdhury ◽  
R Parvin ◽  
J. A. Begum ◽  
M. Giasuddin ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Influenza Virus ◽  
Avian Influenza ◽  
Matrix Protein ◽  
Simultaneous Detection ◽  
High Fidelity ◽  
Rt Pcr ◽  
Chain Reaction ◽  
One Step ◽  
Polymerase Chain

Influenza A virus, subtype H5N1 causes a fatal disease in domestic poultry and could spread directly from poultry to humans. The aim of this study was to develop a multiplex reverse transcription polymerase chain reaction (mRT-PCR) for simultaneous detection of Type A influenza virus-specific matrix protein (M) gene as well as H5 and N1 genes of highly pathogenic avian influenza (HPAI) viruses. Finnzymes Phusion-Flash High- Fidelity PCR Master Mix (Finnzymes Oy, Finland) and Qiagen one-step RT-PCR enzyme mix (Qiagen, Germany) were used in a one-step RT-PCR. RNA was extracted from two known positive samples using Qiagen RNA extraction kit. RT-PCR was carried out with a mixture of primers specific for the Type A influenza virus matrix protein (M), and H5 and N1 genes of H5N1 HPAI viruses in a single reaction system. The mRT-PCR cDNA products were visualized by gel electrophoresis. The mRT-PCR yielded fragments of 245 bp for M, 545 bp for H5 and 343 bp for N1 genes of HPAI virus, which were clearly distinguishable. The mRT-PCR using the Finnzymes Phusion-Flash High-Fidelity PCR Master Mix (Finnzymes Oy, Finland) with Qiagen one-step RT-PCR Enzyme Mix (Qiagen, Germany) required only one hour and 20 minutes. (Bangl. vet. 2011. Vol. 28, No. 2, 55 – 59)DOI: http://dx.doi.org/10.3329/bvet.v28i2.10653

scholarly journals Unextendible Sets of Mutually Unbiased Basis Obtained from Complete Subgraphs

Mathematics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 1388
Author(s):  
Andrés García ◽  
Pablo Carlos López
Keyword(s):  
Regular Graph ◽  
Mutually Unbiased Bases ◽  
Complete Sets ◽  
Unbiased Basis

We propose a method, based on the search and identification of complete subgraphs of a regular graph, to obtain sets of Pauli operators whose eigenstates form unextendible complete sets of mutually unbiased bases of n-qubit systems. With this method we can obtain results for complete and inextensible sets of mubs for 2, 3, 4 and 5 qubits.

scholarly journals Comparison of Various CFD Codes for LES Simulations of Turbomachinery: From Inviscid Vortex Convection to Multi-Stage Compressor

2018 ◽  
Author(s):  
Vincent Brunet ◽  
Emma Croner ◽  
Alexandre Minot ◽  
Jérôme de Laborderie ◽  
Eric Lippinois ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Methods ◽  
Discontinuous Galerkin ◽  
Finite Volume ◽  
Test Cases ◽  
High Fidelity ◽  
Advantages And Disadvantages ◽  
Analytical Results ◽  
Multi Stage ◽  
Numerical Approaches

Some possible future High Fidelity CFD codes for LES simulation of turbomachinery are compared on several test cases increasing in complexity, starting from a very simple inviscid Vortex Convection to a multistage axial experimental compressor. Simulations were performed between 2013 and 2016 by major Safran partners (Cenaero, Cerfacs, CORIA and Onera) and various numerical methods compared: Finite Volume, Discontinuous Galerkin, Spectral Differences. Comparison to analytical results, to experimental data or to RANS simulations are performed to check and measure accuracy. CPU efficiency versus accuracy are also presented. It clearly appears that the level of maturity could be different between codes and numerical approaches. In the end, advantages and disadvantages of every codes obtained during this project are presented.

Toward implementation of coding for quantum sources and channels

2004 ◽  
Vol 4 (6&7) ◽  
pp. 526-536
Author(s):  
M. Sasaki
Keyword(s):  
Channel Coding ◽  
Degrees Of Freedom ◽  
Source Coding ◽  
Single Photon ◽  
Original Data ◽  
High Fidelity ◽  
Linear Optics ◽  
Theoretical Limit ◽  
Quantum Coding ◽  
Optical Paths

We review our experiment on quantum source and channel codings, the most fundamental operations in quantum info-communications. For both codings, entangling letter states is essential. Our model is based on the polarization-location coding, and a quasi-single photon linear optics implementation to entangle the polarization and location degrees of freedom. Using single-photon events in a subset of possible cases, we simulate quantum coding-decoding operations for nonorthogonal states under the quasi-pure state condition. In the quantum channel coding, we double the spatial bandwidth (number of optical paths), and demonstrate the information more than double can be transmitted. In the quantum source coding, we halve the spatial bandwidth to compress the data and decompress the original data with the high fidelity approaching the theoretical limit.

scholarly journals High-fidelity simultaneous detection of a trapped-ion qubit register

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Liudmila A. Zhukas ◽  
Peter Svihra ◽  
Andrei Nomerotski ◽  
Boris B. Blinov
Keyword(s):  
Simultaneous Detection ◽  
High Fidelity ◽  
Trapped Ion

Experimental Progress in Linear Optics Quantum Computing

2003 ◽  
Vol 3 (special) ◽  
pp. 553-562
Author(s):  
J.D. Franson ◽  
M.M. Donegan ◽  
M.J. Fitch ◽  
B.C. Jacobs ◽  
T.B. Pittman
Keyword(s):  
Quantum Logic ◽  
Logic Gates ◽  
Memory Device ◽  
High Fidelity ◽  
Single Photons ◽  
Linear Optics ◽  
Optical Elements ◽  
Quantum Logic Gates ◽  
Feed Forward Control ◽  
Logic Operations

Probabilistic quantum logic operations can be performed using linear optical elements and post-selection based on the results of measurements on ancilla photons. We review the results of a number of recent experiments in this area, including the demonstration of several quantum logic gates, the use of feed-forward control, a new source of single photons, and a quantum memory device for single photons. A high-fidelity approach in which the logic gates always produce an output will also be discussed.

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