Summary
Mesoscopic systems provide a new tool for quantum systems design. In particular, they are enabling of robust quantum control. Here “mesoscopic system” refers to a connected network where each element, if studied alone, would be a quantum bit. The network is too big to be treated fully quantum mechanically. We do not have individual control over each element and we measure collective properties of the network. However, the network retains quantum coherence and behaves in a uniquely quantum fashion. In this project, we design a novel protocol using an intermediate mesoscopic system to control and interconnect non-interacting qubits. Our method aims to create entanglement between two separated qubits; a pure quantum correlation between the target qubits that provides a measure of the mesoscopic system’s quantum capacity. Over the course of this project, we will develop new theory and experimental tools. Ultimately, we expect our work will lead to innovative design elements for use in quantum processor architectures and quantum measurement devices.
Figure 1: The summary of the entangling protocol: (a) The experimentally available control tools are used to correlate two joint logical states of the target with two very distinct collective states of the mesoscopic system, (b) A low-resolution global measurement over the mesoscopic system discerns between the distinct collective states of the mesoscopic system. This measurement updates the state of the qubits into one of the two logical joint states, each with a probability of ½, along with the state of the mesoscopic system. Both of these joint logical states are maximally entangled quantum states between the target qubits.
Related Content
Enabling Next-Generation Sustainable Computing through Novel Multi-Valued-Logic Quantum Devices
As the demand for digital services grows, so does the need for data centres and transmission networks. Unfortunately, these data systems consume vast amounts of energy, resulting in nearly 1% of all energy-related greenhouse gas emissions. This project aims to invent novel quantum devices for highly energy-efficient computing that may help reduce the global digital […]
June 12, 2023
Quantum Simulation of Strongly Coupled Field Theories
Strongly-coupled field theories describe both fundamental and applied quantum problems.
August 10, 2017
Folk Understanding of Quantum Physics
Summary It is often said that quantum concepts are counterintuitive. However, quantum concepts may not be equally counterintuitive to people from all cultural backgrounds. As cultural psychologists have discovered, culture fundamentally shapes the way people make sense of the world. In particular, the last few decades of research have documented cultural differences in appreciation of […]
March 24, 2021
Carbon Nanotube Monolayer Josephson Junction Superconducting Qubit
Carbon nanotubes (CNTs) are a promising material for use in Josephson-Junctions (JJs) given their unique properties, such as high electrical conductivity, pristine surface, inherent nanoscale dimension, and silicon-compatible processing
June 1, 2017