Design and Implementation of an Entanglement Harvesting Experiment With Superconducting Flux Qubits
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Date
2022-05-16
Authors
Ren, Shaun
Journal Title
Journal ISSN
Volume Title
Publisher
University of Waterloo
Abstract
Recent studies in relativistic quantum information have predicted that it is possible
to entangle two qubits tunably coupled to the same quantum field in its vacuum state,
by allowing the qubits to couple to the field for a very short amount of time, even if the
coupling time forbids the formation of a lightlike connection between the qubits. This is
made possible due to the correlations already present in the vacuum field. To date, no
experiments have been performed to demonstrate this phenomenon.
Recent work by the superconducting quantum devices (SQD) group has produced a novel
device, namely the superconducting flux qubit with a tunable ultrastrong coupler, has the
properties especially suited for an entanglement harvesting experiment. The device, which
allows light-matter interaction strength to be tuned from weak to ultrastrong coupling,
opens the possibility of a realistic implementation of the experiment.
In this thesis, we propose a circuit quantum electrodynamics (QED) experiment using
the newly designed device to detect the harvesting of entanglement from a one-dimensional
quantum field. First, we derive the necessary theoretical model that allows us to analyze
the feasibility of such an experiment. Then, we analyze the feasibility of the experiment
and calculate the optimal parameters that allow the most entanglement to be harvested.
Finally, using the optimal parameters, we propose a design for the experiment and validate
the design through simulations.
Description
Keywords
relativistic quantum information, quantum field theory, superconducting qubits, ultrastrong coupling