عنوان

Metrology of Quantum Control and Measurement in Superconducting Qubits

Number

TL0g29b4p0

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Metrology of Quantum Control and Measurement in Superconducting Qubits

General Material Designation

[Thesis]

First Statement of Responsibility

Chen, Zijun

Subsequent Statement of Responsibility

Martinis, John M

Date of Publication, Distribution, etc.

2018

Body granting the degree

Martinis, John M

Text preceding or following the note

2018

Text of Note

Quantum computers have the potential to solve problems which are classically intractable. Superconducting qubits present a promising path to building such a computer. Recent experiments with these qubits have demonstrated the principles of quantum error correction, quantum simulation, quantum annealing, and more. Current research with superconducting qubits is focused on two primary goals: creating a fully fault tolerant logical qubit out of many physical qubits using surface code error correction, and demonstrating an exponential speedup over any classical computer for a well-defined computational problem. To achieve either of these goals requires high precision control of three components: single qubit gates, two qubit gates, and qubit measurement. In this thesis, we use randomized benchmarking to characterize single qubit gates with 99.95\% fidelity and two qubit gates wiht 99.5\% fidelity in superconducting transmon qubits. In addition, we use standard decoherence measurements as well as newly developed extensions of randomized benchmarking to determine the limiting sources of error. Finally, we explore the surprisingly complicated dynamics of measuring the transmon state through a coupled resonator, and show that fully understanding this process requires breaking a few "standard" assumptions.

Lettman, Molly Marie

Chen, Zijun

UC Santa Barbara

Electronic name

p

[Thesis]

276903

a

Y