Entangling Nuclear Spins in Distant Quantum Dots via an Electron Bus
Abstract
We propose a protocol for the deterministic generation of entanglement between two ensembles of nuclear spins surrounding two distant quantum dots. The protocol relies on the injection of electrons with definite polarization, their sequential interaction with the nuclear ensembles of each quantum dot for a short time, and the coherent transfer of each electron from one quantum dot to the other. Computing the exact dynamics for small systems, and using an effective master equation and approximate nonlinear equations of motion for larger systems, we are able to confirm that our protocol indeed produces entanglement for both homogeneous and inhomogeneous systems. Last, we analyze the feasibility of our protocol in several current experimental platforms.
Additional Information
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society. (Received 18 December 2020; revised 25 March 2022; accepted 25 May 2022; published 6 July 2022) The authors thank Juan Ignacio Cirac for useful discussions at the beginning of the project, and Johannes Feist for sharing his software to obtain and numerically solve equations of motion for quantum operators [77,78], which in the end was not used in this work. M. Bello acknowledges support from the ERC Advanced Grant QUENOCOBA (GA No. 742102). M. Benito acknowledges support by the Georg H. Endress foundation. G.P. is supported by Spain's MINECO through Grant No. PID2020-117787GB-I00 and by CSIC Research Platform PTI-001. G.G. acknowledges support from the Spanish AEI under Grant No. PID2020-115406GB-I00 "GEQCO," the Diputación de Gipuzkoa (Grant No. 2021-CIEN-000070-01, GipuzkoaNEXT), the Basque Government's IKUR initiative on Quantum technologies (Department of Education), and from the European Union (EU) through Horizon 2020 (FET-Open project SPRING Grant No. 863098).Attached Files
Published - PhysRevApplied.18.014009.pdf
Submitted - 2012.09507.pdf
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Additional details
- Eprint ID
- 115840
- Resolver ID
- CaltechAUTHORS:20220725-157141000
- 742102
- European Research Council (ERC)
- Georg H. Endress Foundation
- PID2020-117787GB-I00
- Ministerio de Economía, Industria y Competitividad (MINECO)
- PTI-001
- Consejo Superior de Investigaciones Científicas (CSIC)
- PID2020-115406GB-I00
- Ministerio de Economía, Industria y Competitividad (MINECO)
- 2021-CIEN-000070-01
- Diputación de Gipuzkoa
- 863098
- European Research Council (ERC)
- Basque Department of Education, Universities and Research
- Max Planck Society
- Created
-
2022-07-27Created from EPrint's datestamp field
- Updated
-
2022-08-02Created from EPrint's last_modified field
- Caltech groups
- AWS Center for Quantum Computing