scholarly journals FREQUENCY NOISE INFLUENCE ON FUNCTIONING OF FREDKIN QUANTUM GATE

2010 ◽  
pp. 118-126
Author(s):  
Gennadiy P. Gorskyi ◽  
Vitaliy G. Deibuk
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Standard Deviation ◽  
Magnetic Resonance ◽  
Radio Frequency ◽  
Correct Answer ◽  
Quantum Gate ◽  
Frequency Noise ◽  
Fredkin Gate ◽  
Frequency Magnetic Field

The influence of detuning of radio frequency magnetic field (RFMF) on the functioning of nuclear magnetic resonance (NMR) quantum Fredkin gate is considered in this paper. It is shown that detuning of frequency decreases a probability of correct answer. If the spectral broadband of RFMF signal is increasing, then the main value of correct answer probability is decreasing too and standard deviation of this probability is increasing.

scholarly journals Homogenous nuclear magnetic resonance probe using the space harmonics suppression method

2020 ◽  
Vol 9 (1) ◽  
pp. 117-125
Author(s):  
Pauline de Pellegars ◽  
Liu Pan ◽  
Rahima Sidi-Boulenouar ◽  
Eric Nativel ◽  
Michel Zanca ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Radio Frequency ◽  
Signal To Noise ◽  
Space Harmonics ◽  
Saddle Coil ◽  
Radio Frequency Coils ◽  
Shs Method ◽  
Nuclear Magnetic

Abstract. Nuclear magnetic resonance imaging (MRI) has became an unavoidable medical tool in spite of its poor sensitivity. This fact motivates the efforts to enhance the nuclear magnetic resonance (NMR) probe performance. Thus, the nuclear spin excitation and detection, classically performed using radio-frequency coils, are required to be highly sensitive and homogeneous. The space harmonics suppression (SHS) method, already demonstrated to construct coil producing homogenous static magnetic field, is used in this work to design radio-frequency coils. The SHS method is used to determine the distribution of the electrical conductive wires which are organized in a saddle-coil-like configuration. The theoretical study of these SHS coils allows one to expect an enhancement of the signal-to-noise ratio with respect to saddle coil. Coils prototypes were constructed and tested to measure 1H NMR signal at a low magnetic field (8 mT) and perform MRI acquired at a high magnetic field (3 T). The signal-to-noise ratios of these SHS coils are compared to the one of saddle coil and birdcage (in the 3 T case) of the same size under the same pulse sequence conditions demonstrating the performance enhancement allowed by the SHS coils.

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