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Title: Transport of spin qubits with donor chains under realistic experimental conditions

Abstract

The ability to transport quantum information across some distance can facilitate the design and operation of a quantum processor. One-dimensional spin chains provide a compact platform to realize scalable spin transport for a solid-state quantum computer. Here, we model odd-sized donor chains in silicon under a range of experimental nonidealities, including variability of donor position within the chain. We show that the tolerance against donor placement inaccuracies is greatly improved by operating the spin chain in a mode where the electrons are confined at the Si-SiO2 interface. We then estimate the required time scales and exchange couplings, and the level of noise that can be tolerated to achieve high-fidelity transport. As a result, we also propose a protocol to calibrate and initialize the chain, thereby providing a complete guideline for realizing a functional donor chain and utilizing it for spin transport.

Authors:
 [1];  [1];  [1];  [2];  [2];  [1]
  1. UNSW Australia, Sydney, NSW (Australia)
  2. Purdue Univ., West Lafayette, IN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1327730
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Mohiyaddin, Fahd A., Kalra, Rachpon, Laucht, Arne, Rahman, Rajib, Klimeck, Gerhard, and Morello, Andrea. Transport of spin qubits with donor chains under realistic experimental conditions. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.045314.
Mohiyaddin, Fahd A., Kalra, Rachpon, Laucht, Arne, Rahman, Rajib, Klimeck, Gerhard, & Morello, Andrea. Transport of spin qubits with donor chains under realistic experimental conditions. United States. https://doi.org/10.1103/PhysRevB.94.045314
Mohiyaddin, Fahd A., Kalra, Rachpon, Laucht, Arne, Rahman, Rajib, Klimeck, Gerhard, and Morello, Andrea. Mon . "Transport of spin qubits with donor chains under realistic experimental conditions". United States. https://doi.org/10.1103/PhysRevB.94.045314. https://www.osti.gov/servlets/purl/1327730.
@article{osti_1327730,
title = {Transport of spin qubits with donor chains under realistic experimental conditions},
author = {Mohiyaddin, Fahd A. and Kalra, Rachpon and Laucht, Arne and Rahman, Rajib and Klimeck, Gerhard and Morello, Andrea},
abstractNote = {The ability to transport quantum information across some distance can facilitate the design and operation of a quantum processor. One-dimensional spin chains provide a compact platform to realize scalable spin transport for a solid-state quantum computer. Here, we model odd-sized donor chains in silicon under a range of experimental nonidealities, including variability of donor position within the chain. We show that the tolerance against donor placement inaccuracies is greatly improved by operating the spin chain in a mode where the electrons are confined at the Si-SiO2 interface. We then estimate the required time scales and exchange couplings, and the level of noise that can be tolerated to achieve high-fidelity transport. As a result, we also propose a protocol to calibrate and initialize the chain, thereby providing a complete guideline for realizing a functional donor chain and utilizing it for spin transport.},
doi = {10.1103/PhysRevB.94.045314},
journal = {Physical Review B},
number = 4,
volume = 94,
place = {United States},
year = {Mon Jul 25 00:00:00 EDT 2016},
month = {Mon Jul 25 00:00:00 EDT 2016}
}

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