### Skapa referens, olika format (klipp och klistra)

**Harvard**

Wallquist, M. (2006) *Controllable coupling of superconducting qubits and implementation of quantum gate protocols*. Göteborg : Chalmers University of Technology (Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, nr: 2511).

** BibTeX **

@book{

Wallquist2006,

author={Wallquist, Margareta},

title={Controllable coupling of superconducting qubits and implementation of quantum gate protocols},

isbn={91-7291-829-2},

abstract={The concept of a quantum computer was invented in the beginning of the 1980s as a quantum generalization of the reversible classical computer. After discoveries in the middle of the 1990s of quantum algorithms, which would
solve some problems considered intractable for classical
computers, the field of quantum computing has developed rapidly. A wide range of quantum systems are investigated for their possible ability to implement quantum algorithms in practice. The most promising solid state implementations are superconducting electrical circuits based on the Josephson effect, and the Coulomb blockade effect. Superconducting circuits are macroscopic quantum systems
which can be fabricated using standard lithography technologies. Superconducting qubits - basic building blocks of a quantum computer - have been developed at several research laboratories, among others the MC2 here at Chalmers. This thesis presents a theoretical investigation of controllable coupling of superconducting qubits based on the single Cooper-pair box. Two coupling schemes are investigated in detail: current-controlled coupling via large Josephson junctions, and coupling via a superconducting stripline cavity. Both coupling designs are scalable and suitable for the charge regime of the single Cooper-pair box, as well as for the charge-phase regime where the qubit is better protected from environmental noise. Quantum gate protocols which are relevant for these physical couplings are discussed. The investigations show that, for both considered designs, the simplest two-qubit gate is the conditional phase-shift gate. This gate is universal for quantum computing, and it can create maximally
entangled qubit pairs in only one run. The investigation combines methods from electrical engineering, quantum mechanics and quantum computer science.},

publisher={Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik, Chalmers tekniska högskola,},

place={Göteborg},

year={2006},

series={Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2511Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology, no: 81},

keywords={Quantum Computer, Quantum Electrical Circuit, Superconducting Circuit, Josephson Effect, Single Cooper-Pair Box, Qubit, Controllable Qubit-Coupling, Quantum Gate},

note={500 kB},

}

** RefWorks **

RT Dissertation/Thesis

SR Print

ID 22232

A1 Wallquist, Margareta

T1 Controllable coupling of superconducting qubits and implementation of quantum gate protocols

YR 2006

SN 91-7291-829-2

AB The concept of a quantum computer was invented in the beginning of the 1980s as a quantum generalization of the reversible classical computer. After discoveries in the middle of the 1990s of quantum algorithms, which would
solve some problems considered intractable for classical
computers, the field of quantum computing has developed rapidly. A wide range of quantum systems are investigated for their possible ability to implement quantum algorithms in practice. The most promising solid state implementations are superconducting electrical circuits based on the Josephson effect, and the Coulomb blockade effect. Superconducting circuits are macroscopic quantum systems
which can be fabricated using standard lithography technologies. Superconducting qubits - basic building blocks of a quantum computer - have been developed at several research laboratories, among others the MC2 here at Chalmers. This thesis presents a theoretical investigation of controllable coupling of superconducting qubits based on the single Cooper-pair box. Two coupling schemes are investigated in detail: current-controlled coupling via large Josephson junctions, and coupling via a superconducting stripline cavity. Both coupling designs are scalable and suitable for the charge regime of the single Cooper-pair box, as well as for the charge-phase regime where the qubit is better protected from environmental noise. Quantum gate protocols which are relevant for these physical couplings are discussed. The investigations show that, for both considered designs, the simplest two-qubit gate is the conditional phase-shift gate. This gate is universal for quantum computing, and it can create maximally
entangled qubit pairs in only one run. The investigation combines methods from electrical engineering, quantum mechanics and quantum computer science.

PB Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik, Chalmers tekniska högskola,

T3 Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2511Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology, no: 81

LA eng

OL 30