Coherent Interactions in Rare-earth-ion-doped Crystals for Applications in Quantum Information Science PDF Download
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Author: Mattias Nilsson
Publisher:
ISBN:
Category : Ionic crystals
Languages : en
Pages : 226
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Author: Mattias Nilsson
Publisher:
ISBN:
Category : Ionic crystals
Languages : en
Pages : 226
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Author: Probst, Sebastian
Publisher: KIT Scientific Publishing
ISBN: 373150345X
Category : Physics
Languages : en
Pages : 156
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Hybrid quantum circuits interfacing rare earth spin ensembles with microwave resonators are a promising approach for application as coherent quantum memory and frequency converter. In this thesis, hybrid circuits based on Er and Nd ions doped into Y?SiO? and YAlO? crystals are investigated by optical and on-chip microwave spectroscopy. Coherent strong coupling between the microwave resonator and spin ensemble as well as a multimode memory for weak coherent microwave pulses are demonstrated.
Author: Hafsa Syed
Publisher:
ISBN: 9789180394024
Category :
Languages : en
Pages : 0
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Author: Janus Halleløv Wesenberg
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Adam Kinos
Publisher:
ISBN: 9789177535430
Category :
Languages : en
Pages : 203
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Author: Sebastian Probst
Publisher:
ISBN: 9781013282515
Category : Science
Languages : en
Pages : 148
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Book Description
Hybrid quantum circuits interfacing rare earth spin ensembles with microwave resonators are a promising approach for application as coherent quantum memory and frequency converter. In this thesis, hybrid circuits based on Er and Nd ions doped into Y?SiO? and YAlO? crystals are investigated by optical and on-chip microwave spectroscopy. Coherent strong coupling between the microwave resonator and spin ensemble as well as a multimode memory for weak coherent microwave pulses are demonstrated. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Author: Rose Ahlefeldt
Publisher:
ISBN:
Category : Crystals
Languages : en
Pages : 438
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This thesis presents a spectroscopic study of the 7F0-5D0 transition of Eu3+ in EuCl3.6H2O, which is used to evaluate the potential performance of a quantum computing system implemented in EuCl3.6H2O and, more generally, in stoichiometric rare earth crystals. EuCl3.6H2O has one of the narrowest optical inhomogeneous linewidths of any solid but this linewidth is shown to be still much larger than that required for practical quantum computing in a rare earth crystal. To assess the possibility of reducing the linwidth, the contributions of isotopic impurities to both the optical linewidth and line structure were investigated, and ligand isotopes were identified as a major source of both inhomogeneous broadening and structure on the optical transition, suggesting that the linewidth could be substantially reduced by isotopically purifying EuCl3.6H2O. The effect of ligand isotopes on the optical lifetime and coherence time was also investigated. It was found that fully deuterating the crystal to EuCl3.6D2O substantially improves both the lifetime and coherence time. The satellite lines formed in the optical spectrum of a rare earth crystal when it is doped with another rare earth are proposed as qubits. A crucial step in characterising EuCl3.6H2O for quantum computing is associating these satellite lines in EuCl3.6H2O with crystallographic sites. A new method for associating sites with lines, which works for low symmetry crystals such as EuCl3.6H2O, is presented. This method involves modelling the splitting of the ground state hyperfine levels caused by the magnetic dipole-dipole interaction between a Kramers dopant and the Eu3+ ion. Using this method, most of the outer satellite lines in rare earth doped EuCl3.6H2O were assigned to crystallographic sites. It has been proposed that the electronic interactions between these satellite lines be used to enact two-qubit gates in a rare earth quantum computer. These interactions were measured between a number of different satellite lines using a new two-laser spectral holeburning technique. Interactions of up to 46.081 +- 0.005 MHz were observed, and this was the first time that electronic interactions between weakly coupled rare earth ions had been measured. The two most common interactions identified between rare earth ions in solids are electric dipole-dipole and exchange, but the observed interactions are stronger than expected from a electric dipole-dipole model and occur at too large a distance to be superexchange. It is shown that the development of a moderate-sized quantum processor, one with more than 10 qubits, in a stoichiometric rare earth crystal is feasible provided that the optical inhomogeneous linewidth is reduced below 1 MHz. Demonstrations of three or four qubit devices should be possible using existing materials.
Author: Antonella Karlson
Publisher:
ISBN:
Category : Computers
Languages : en
Pages : 252
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"FET is the IST Programme nursery of novel and emerging scientific ideas. Its mission is to promote research that is of a long-term nature or involves particularly high risks, compensated by the potential of a significant societal or industrial impact. " -- ISTweb, Directorate F, Future and Emerging Technologies home page.
Author: Emmanuel Zambrini Cruzeiro
Publisher:
ISBN:
Category :
Languages : en
Pages : 185
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Author: Qian Li
Publisher:
ISBN: 9789177536161
Category :
Languages : en
Pages : 159
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