Lewis, D;
Moutinho, JP;
Costa, AT;
Omar, Y;
Bose, S;
(2023)
Low-dissipation data bus via coherent quantum dynamics.
Physical Review B
, 108
(7)
, Article 075405. 10.1103/PhysRevB.108.075405.
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Abstract
The transfer of information between two physical locations is an essential component of both classical and quantum computing. In quantum computing the transfer of information must be coherent to preserve quantum states and hence the quantum information. We establish a simple protocol for transferring one- and two-electron encoded logical qubits in quantum dot arrays. The theoretical energetic cost of this protocol is calculated - in particular, the cost of freezing and unfreezing tunneling between quantum dots. Our results are compared with the energetic cost of shuttling qubits in quantum dot arrays and transferring classical information using classical information buses. Only our protocol can manage constant dissipation for any chain length. This protocol could reduce the cooling requirements and constraints on scalable architectures for quantum dot quantum computers.
| Type: | Article |
|---|---|
| Title: | Low-dissipation data bus via coherent quantum dynamics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.108.075405 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.108.075405 |
| Language: | English |
| Additional information: | © 2023 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10175844 |
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