scholarly journals Regularized dynamical decoupling noise spectroscopy – a decoherence descriptor for radicals in glassy matrices

2021 ◽  
Vol 23 (38) ◽  
pp. 21664-21676
Author(s):  
Janne Soetbeer ◽  
Luis Fábregas Ibáñez ◽  
Zachariah Berkson ◽  
Yevhen Polyhach ◽  
Gunnar Jeschke
Keyword(s):  
Noise Spectrum ◽  
Dynamical Decoupling ◽  
Noise Spectroscopy ◽  
Glassy Matrices

A noise spectrum captures the decoherence-inducing spin environment fluctuations and thus provides a quantitative decoherence description.

scholarly journals Estimation of the Laser Frequency Noise Spectrum by Continuous Dynamical Decoupling

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Manchao Zhang ◽  
Yi Xie ◽  
Jie Zhang ◽  
Weichen Wang ◽  
Chunwang Wu ◽  
...  
Keyword(s):  
Noise Spectrum ◽  
Laser Frequency ◽  
Frequency Noise ◽  
Dynamical Decoupling

scholarly journals Noise spectroscopy through dynamical decoupling with a superconducting flux qubit

2011 ◽  
Vol 7 (7) ◽  
pp. 565-570 ◽  
Author(s):  
Jonas Bylander ◽  
Simon Gustavsson ◽  
Fei Yan ◽  
Fumiki Yoshihara ◽  
Khalil Harrabi ◽  
...  
Keyword(s):  
Dynamical Decoupling ◽  
Noise Spectroscopy ◽  
Flux Qubit ◽  
Superconducting Flux Qubit

High Performance Nanostructured Silicon Oxide Impedance Biosensor System with Online Noise Spectroscopy Analysis

2014 ◽  
Vol 1064 ◽  
pp. 191-196
Author(s):  
Nirmalya Samanta ◽  
Hrilina Ghosh
Keyword(s):  
Digital Signal Processor ◽  
High Performance ◽  
Silicon Oxide ◽  
Specific Antigen ◽  
Complex Mixture ◽  
Digital Signal ◽  
Noise Spectrum ◽  
Spectroscopy Analysis ◽  
Noise Spectroscopy ◽  
Biosensor System

In this paper, noise spectroscopy has been reported earlier as an efficient tool for enhancing the selectivity of biosensors and the analysis was carried out by desktop spectrum analyzer. There were no reports, however, on the efficacy of this method in complex mixture. We have performed here for the first time, noise spectroscopy analysis on complex mixture of food toxin samples and observed that the first cut-off frequencies are indicative of the fact whether the solution has only specific antigen, mixture of specific and nonspecific antigen or no specific antigen at all. To realize a portable immunosensor, we have developed an electronic interface using digital signal processor (DSP) chip of Microchip Technology which has the embedded Fast Fourier Transform (FFT) algorithm for computation of noise spectrum. The entire system has been successfully demonstrated to detect 0.1 fg/ml aflatoxin B1 (AfB1) from a complex mixture with as high as 1000ng/ml non-specific toxins.

scholarly journals The dynamical-decoupling-based spatiotemporal noise spectroscopy

2019 ◽  
Vol 21 (4) ◽  
pp. 043034 ◽  
Author(s):  
Jan Krzywda ◽  
Piotr Szańkowski ◽  
Łukasz Cywiński
Keyword(s):  
Dynamical Decoupling ◽  
Noise Spectroscopy ◽  
Spatiotemporal Noise

scholarly journals Environmental noise spectroscopy with qubits subjected to dynamical decoupling

2017 ◽  
Vol 29 (33) ◽  
pp. 333001 ◽  
Author(s):  
P Szańkowski ◽  
G Ramon ◽  
J Krzywda ◽  
D Kwiatkowski ◽  
Ł Cywiński
Keyword(s):  
Environmental Noise ◽  
Dynamical Decoupling ◽  
Noise Spectroscopy

SHOT NOISES IN A CORRELATED TUNNELING CURRENT

1993 ◽  
Vol 07 (17) ◽  
pp. 1159-1165 ◽  
Author(s):  
YU. M. GALPERIN ◽  
ULRIK HANKE ◽  
K. A. CHAO ◽  
NANZHI ZOU
Keyword(s):  
Coulomb Blockade ◽  
Electron Tunneling ◽  
Tunneling Current ◽  
Noise Spectrum ◽  
Frequency Noise ◽  
Tunneling System ◽  
Noise Spectroscopy ◽  
Single Electron Tunneling ◽  
Theoretical Predictions ◽  
Existing Result

An analytical expression for shot noises in a correlated sequential tunneling current has been derived by solving the Master equation exactly. The existing result for the simplest case of Pauli correlation is easily reproduced. Our theory is applied to the Coulomb blockade single-electron tunneling system with two tunnel junctions. Given capacitances and resistances of the system, both the suppressed zero-frequency shot noise and the entire finite-frequency noise spectrum are obtained, which are much more complicated than the simplest Pauli correlation case. Our theoretical predictions, after being confirmed experimentally, will introduce the noise spectroscopy as a tool to investigate correlated tunneling current.

Molecular-Spin-Qubit Noise Spectroscopy Through Dynamical Decoupling

2021 ◽  
Vol 15 (6) ◽  
Author(s):  
Yue Fu ◽  
Yang Wu ◽  
Yingqiu Dai ◽  
Xi Qin ◽  
Xing Rong ◽  
...  
Keyword(s):  
Dynamical Decoupling ◽  
Noise Spectroscopy ◽  
Spin Qubit ◽  
Molecular Spin

scholarly journals All-optical noise spectroscopy of a solid-state spin

2021 ◽  
Author(s):  
Demitry Farfurnik ◽  
Harjot Singh ◽  
Zhouchen Luo ◽  
Allan Bracker ◽  
Sam Carter ◽  
...  
Keyword(s):  
Solid State ◽  
Spin Dynamics ◽  
Pulse Sequences ◽  
Noise Spectrum ◽  
Frequency Noise ◽  
Optical Noise ◽  
Spin Qubits ◽  
Noise Spectroscopy ◽  
All Optical ◽  
State Spin

Abstract Noise spectroscopy elucidates the fundamental noise sources in spin systems, which is essential for developing spin qubits with long coherence times for quantum information processing, communication, and sensing. But noise spectroscopy typically relies on microwave coherent spin control to extract the noise spectrum, which becomes infeasible when there are high-frequency noise components stronger than the available microwave power. Here, we demonstrate an alternative all-optical approach to performing noise spectroscopy. Our approach utilises coherent Raman rotations of the spin state with controlled timing and phase to implement Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences. Analysing the spin dynamics under these sequences enables us to extract the noise spectrum of a dense ensemble of nuclear spins interacting with a single spin in a quantum dot, which has thus far only been modelled theoretically. By providing large spectral bandwidths of over 100 MHz, our Raman-based approach could serve as an important tool to study spin dynamics and decoherence mechanisms for a broad range of solid-state spin qubits.

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