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 non-idealities, 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 timescales and exchange couplings, and the level of noise that can be tolerated to achieve high fidelity transport. 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.

19 pages, 12 figures

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Cited by in corpus (15)

• Semiconductor Spin Qubits
• Semiconductor Qubits In Practice
• Silicon quantum processor with robust long-distance qubit couplings
• Donor spins in silicon for quantum technologies
• Automatic spin-chain learning to explore the quantum speed limit
• Superadiabatic quantum state transfer in spin chains
• Coherent ground-state transport of neutral atoms
• Simultaneous multiple-users quantum communication across a spin chain channel
• Jellybean quantum dots in silicon for qubit coupling and on-chip quantum chemistry
• Statistical exchange-coupling errors and the practicality of scalable silicon donor qubits
• Fast high-fidelity single-qubit gates for flip-flop qubits in silicon
• Optimal remote restoring of quantum states in communication lines via local magnetic field
• Spin relaxation of a donor electron coupled to interface states
• A $\pi$-shaped Quantum Device for Implementation of Bell States in Solid State Environment
• Coherence restoring in communication line via controlled interaction with environment