The Experts below are selected from a list of 59754 Experts worldwide ranked by ideXlab platform
Carol Livermore - One of the best experts on this subject based on the ideXlab platform.
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a mems singlet oxygen generator part ii Experimental Exploration of the performance space
IEEE\ ASME Journal of Microelectromechanical Systems, 2007Co-Authors: Tyrone F. Hill, Alan H. Epstein, Benjamin A. Wilhite, Steven J Davis, Luis Fernando Velasquezgarcia, W T Rawlins, Seonkyung Lee, Klavs F Jensen, Carol LivermoreAbstract:This paper reports the quantitative Experimental Exploration of the performance space of a microfabricated singlet oxygen generator (muSOG). SOGs are multiphase reactors that mix H2O2, KOH, and Cl2 to produce singlet delta oxygen, or O2 (a). A scaled-down SOG is being developed as the pump source for a microfabricated chemical oxygen-iodine laser system because scaling down a SOG yields improved performance compared to the macroscaled versions. The performance of the muSOG was characterized using O2 (a) yield, chlorine utilization, power in the flow, molar flow rate per unit of reactor volume, and steady-state operation as metrics. The performance of the muSOG is measured through a series of optical diagnostics and mass spectrometry. The test rig, which enables the monitoring of temperatures, pressures, and the molar flow rate of O2 (a), is described in detail. Infrared spectra and mass spectrometry confirm the steady-state operation of the device. Experimental results reveal O2 (a) concentrations in excess of 1017 cm-3, O2 (a) yield at the chip outlet approaching 80%, and molar flow rates of 02(a) per unit of reactor volume exceeding 600 times 10-4 mol/L/s.
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A MEMS Singlet Oxygen Generator—Part II: Experimental Exploration of the Performance Space
Journal of Microelectromechanical Systems, 2007Co-Authors: Tyrone F. Hill, Terry W. Rawlins, Alan H. Epstein, Benjamin A. Wilhite, Steven J Davis, Luis Fernando Velasquez-garcia, Carol LivermoreAbstract:This paper reports the quantitative Experimental Exploration of the performance space of a microfabricated singlet oxygen generator (muSOG). SOGs are multiphase reactors that mix H2O2, KOH, and Cl2 to produce singlet delta oxygen, or O2 (a). A scaled-down SOG is being developed as the pump source for a microfabricated chemical oxygen-iodine laser system because scaling down a SOG yields improved performance compared to the macroscaled versions. The performance of the muSOG was characterized using O2 (a) yield, chlorine utilization, power in the flow, molar flow rate per unit of reactor volume, and steady-state operation as metrics. The performance of the muSOG is measured through a series of optical diagnostics and mass spectrometry. The test rig, which enables the monitoring of temperatures, pressures, and the molar flow rate of O2 (a), is described in detail. Infrared spectra and mass spectrometry confirm the steady-state operation of the device. Experimental results reveal O2 (a) concentrations in excess of 1017 cm-3, O2 (a) yield at the chip outlet approaching 80%, and molar flow rates of 02(a) per unit of reactor volume exceeding 600 times 10-4 mol/L/s.
Sebastian Trimpe - One of the best experts on this subject based on the ideXlab platform.
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Controller Design via Experimental Exploration With Robustness Guarantees
IEEE Control Systems Letters, 2021Co-Authors: Tobias Holicki, Carsten W Scherer, Sebastian TrimpeAbstract:For a partially unknown linear systems, we present a systematic control design approach based on generated data from measurements of closed-loop experiments with suitable test controllers. These experiments are used to improve the achieved performance and to reduce the uncertainty about the unknown parts of the system. This is achieved through a parametrization of auspicious controllers with convex relaxation techniques from robust control, which guarantees that their implementation on the unknown plant is safe. This approach permits to systematically incorporate available prior knowledge about the system by employing the framework of linear fractional representations.
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controller design via Experimental Exploration with robustness guarantees
arXiv: Optimization and Control, 2020Co-Authors: Tobias Holicki, Carsten W Scherer, Sebastian TrimpeAbstract:For an unknown linear system, we present two systematic control design approaches that combine robust synthesis for safety with data-based Exploration for improved performance if compared to a standard robust design. The approaches rely on linear fractional representations which allow us to systematically incorporate prior knowledge about the system and to separate known components from unknown ones. Further, we apply multiplier separation techniques and existing relaxations to cope with the emerging robust multi-objective synthesis problems and to obtain constructive design criteria in terms of linear matrix inequalities. Both approaches are compared with each other and illustrated by numerical examples.
Christoph G. Salzmann - One of the best experts on this subject based on the ideXlab platform.
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Advances in the Experimental Exploration of water's phase diagram
The Journal of chemical physics, 2019Co-Authors: Christoph G. SalzmannAbstract:Water's phase diagram displays enormous complexity with currently 17 Experimentally-confirmed polymorphs of ice and several more predicted computationally. For almost 120 years, it has been a stomping ground for scientific discovery and ice research has often been a trailblazer for investigations into a wide range of materials-related phenomena. Here, the Experimental progress of the last couple of years is reviewed, and open questions as well as future challenges are discussed. The specific topics include the polytypism and stacking disorder of ice I, the mechanism of the pressure amorphization of ice I, the emptying of gas-filled clathrate hydrates to give new low-density ice polymorphs, the effects of acid / base doping on hydrogen-ordering phase transitions as well as the formation of solids solutions between salts and the ice polymorphs, and the effect this has on the appearance of the phase diagram. In addition to continuing efforts to push the boundaries in terms of the extremes of pressure and temperature, the Exploration of the 'chemical' dimensions of ice research appears to now be a newly emerging trend. It is without question that ice research has entered a very exciting era.
Jin Lin - One of the best experts on this subject based on the ideXlab platform.
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Experimental Exploration of five qubit quantum error correcting code with superconducting qubits
arXiv: Quantum Physics, 2019Co-Authors: Ming Gong, Qi Zhao, Xiao Yuan, Shiyu Wang, Y Zhao, Chen Zha, Zhen Zhang, Yunchao Liu, Futian Liang, Jin LinAbstract:Quantum error correction is an essential ingredient for universal quantum computing. Despite tremendous Experimental efforts in the study of quantum error correction, to date, there has been no demonstration in the realisation of universal quantum error correcting code, with the subsequent verification of all key features including the identification of an arbitrary physical error, the capability for transversal manipulation of the logical state, and state decoding. To address this challenge, we Experimentally realise the $[\![5,1,3]\!]$ code, the so-called smallest perfect code that permits corrections of generic single-qubit errors. In the experiment, having optimised the encoding circuit, we employ an array of superconducting qubits to realise the $[\![5,1,3]\!]$ code for several typical logical states including the magic state, an indispensable resource for realising non-Clifford gates. The encoded states are prepared with an average fidelity of $57.1(3)\%$ while with a high fidelity of $98.6(1)\%$ in the code space. Then, the arbitrary single-qubit errors introduced manually are identified by measuring the stabilizers. We further implement logical Pauli operations with a fidelity of $97.2(2)\%$ within the code space. Finally, we realise the decoding circuit and recover the input state with an overall fidelity of $74.5(6)\%$, in total with $92$ gates. Our work demonstrates each key aspect of the $[\![5,1,3]\!]$ code and verifies the viability of Experimental realization of quantum error correcting codes with superconducting qubits.
Liu Yunchao - One of the best experts on this subject based on the ideXlab platform.
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Experimental Exploration of five-qubit quantum error correcting code with superconducting qubits
'Oxford University Press (OUP)', 2021Co-Authors: Gong Ming, Yuan Xiao, Wang Shiyu, Wu Yulin, Zhao Youwei, Zha Chen, Li Shaowei, Zhang Zhen, Qi Zhao, Liu YunchaoAbstract:Quantum error correction is an essential ingredient for universal quantum computing. Despite tremendous Experimental efforts in the study of quantum error correction, to date, there has been no demonstration in the realisation of universal quantum error correcting code, with the subsequent verification of all key features including the identification of an arbitrary physical error, the capability for transversal manipulation of the logical state, and state decoding. To address this challenge, we Experimentally realise the $[\![5,1,3]\!]$ code, the so-called smallest perfect code that permits corrections of generic single-qubit errors. In the experiment, having optimised the encoding circuit, we employ an array of superconducting qubits to realise the $[\![5,1,3]\!]$ code for several typical logical states including the magic state, an indispensable resource for realising non-Clifford gates. The encoded states are prepared with an average fidelity of $57.1(3)\%$ while with a high fidelity of $98.6(1)\%$ in the code space. Then, the arbitrary single-qubit errors introduced manually are identified by measuring the stabilizers. We further implement logical Pauli operations with a fidelity of $97.2(2)\%$ within the code space. Finally, we realise the decoding circuit and recover the input state with an overall fidelity of $74.5(6)\%$, in total with $92$ gates. Our work demonstrates each key aspect of the $[\![5,1,3]\!]$ code and verifies the viability of Experimental realization of quantum error correcting codes with superconducting qubits.Comment: 6 pages, 4 figures + Supplementary Material
