Skip to Main content Skip to Navigation

Design, fabrication and test of a four superconducting quantum-bit processor

Abstract : This thesis presents our effort to design, fabricate and test a simple 4-Josephson qubit processor with scalability potential. The qubits are frequency tunable and are coupled to a shared coupling bus able to implement iSwap two-qubit gates on any pair of qubits. Each qubit is fitted with its own readout made of a Josephson bifurcation amplifier (JBA). The operation principle of the processor, the choice of parameters, the microwave layout design, as well as the fabrication processes are described. A first experiment demonstrates the simultaneous high-fidelity readout of all the qubits by frequency multiplexing of the JBA signals. A second one tests the two-qubit iSwap gate of the processor, the fidelity of which happens to be limited by the intrinsic qubit decoherence.
Complete list of metadatas

Cited literature [140 references]  Display  Hide  Download
Contributor : Abes Star :  Contact
Submitted on : Monday, October 12, 2015 - 11:07:01 AM
Last modification on : Friday, May 29, 2020 - 3:58:22 PM
Document(s) archivé(s) le : Wednesday, January 13, 2016 - 11:33:42 AM


Version validated by the jury (STAR)


  • HAL Id : tel-01214394, version 1


Vivien Schmitt. Design, fabrication and test of a four superconducting quantum-bit processor. Physics [physics]. Université Pierre et Marie Curie - Paris VI, 2015. English. ⟨NNT : 2015PA066184⟩. ⟨tel-01214394⟩



Record views


Files downloads