Towards a Quantum Memory in Semiconductor Quantum Dots.
Lead Research Organisation:
University of Cambridge
Department Name: Physics
Abstract
The 105 nuclear spins which form the mesoscopic environment experienced by an electron in a semiconductor quantum dot (QD) are the predominant source of noise in the system. As such, they decohere the quantum state of the electron on a timescale of a few nanoseconds. The result is that, whilst QD's have excellent optical properties, their lack of a long-lived matter qubit limits their use in
applications such as quantum networks. If one could harness the nuclear spin environment for the storage of quantum information, QD's would be a promising platform for quantum communication.
Our group has already demonstrated a coherent interface between a QD electron and its nuclearspin environment. Using this interface, this work aims to experimentally realise a QD quantum memory based on storing information in magnonic modes. Moreover, with the electron providing proxy control over the nuclear-spin ensemble one can investigate the rich physics of this many-body system. For example, one could imagine generating exotic states of the spin-bath such as Schrödinger-cat states.
applications such as quantum networks. If one could harness the nuclear spin environment for the storage of quantum information, QD's would be a promising platform for quantum communication.
Our group has already demonstrated a coherent interface between a QD electron and its nuclearspin environment. Using this interface, this work aims to experimentally realise a QD quantum memory based on storing information in magnonic modes. Moreover, with the electron providing proxy control over the nuclear-spin ensemble one can investigate the rich physics of this many-body system. For example, one could imagine generating exotic states of the spin-bath such as Schrödinger-cat states.
Organisations
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
EP/N509620/1 | 01/10/2016 | 30/09/2022 | |||
2125538 | Studentship | EP/N509620/1 | 01/10/2018 | 30/06/2022 | Daniel Jackson |
EP/R513180/1 | 01/10/2018 | 30/09/2023 | |||
2125538 | Studentship | EP/R513180/1 | 01/10/2018 | 30/06/2022 | Daniel Jackson |