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

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-SiO 2 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:
Grant/Contract Number:
AC05-00OR22725
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)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1327730

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., 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. doi:10.1103/PhysRevB.94.045314.
Mohiyaddin, Fahd A., Kalra, Rachpon, Laucht, Arne, Rahman, Rajib, Klimeck, Gerhard, and Morello, Andrea. 2016. "Transport of spin qubits with donor chains under realistic experimental conditions". United States. doi: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 = {2016},
month = {7}
}

Works referenced in this record:

Coherent electronic transfer in quantum dot systems using adiabatic passage
journal, December 2004
  • Greentree, Andrew D.; Cole, Jared H.; Hamilton, A. R.
  • Physical Review B, Vol. 70, Issue 23, Article No. 235317
  • DOI: 10.1103/PhysRevB.70.235317

Efficient Multiqubit Entanglement via a Spin Bus
journal, June 2007