Coupling and state transfer in Josephson qubit systems.
PhD Thesis, University of Basel,
Faculty of Science.
Official URL: http://edoc.unibas.ch/diss/DissB_8279
The quantum information science (QIS) is relatively young, but quite broad and emerging ﬁeld of modern physics. This is an interdisciplinary ﬁeld where quantum mechanics, computer science, mathematics and computing technologies meet together. Using the laws of quantum mechanics to deal with information opens many new opportunities. However, these opportunities can only be used if one can construct a quantum logic device to implement QIS methods. In the last decade many researchers proposed the variety of physical systems, that can be used as building blocks of the so called quantum computer. But the question of building an eﬀective connection between diﬀerent blocks remains open. Recently, the idea to build a ’quantum wire’ using chains of permanently coupled spins was studied by a number of authors. The purpose of this thesis is to investigate and develop advanced schemes for using quantum chains as wires. The ﬁrst part of the thesis shortly describes the concepts of quantum computing and quantum state transfer. We then brieﬂy introduce diﬀerent schemes to couple two superconducting qubits and analyze more closely one of them. Then we analyze the process of the state transfer for the chain of ﬂux qubits. Next, we propose a new method of improved quantum state transfer which was created as a part of this thesis. Finally, we study the eﬀects and the role of interference in quantum state transfer via spin chains.
|Committee Members:||Fazio, Rosario|
|Faculties and Departments:||05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)|
|Bibsysno:||Link to catalogue|
|Number of Pages:||99|
|Last Modified:||30 Jun 2016 10:41|
|Deposited On:||13 Feb 2009 16:27|
Repository Staff Only: item control page