Coherent Control of a Single Silicon-29 Nuclear Spin Qubit

Abstract

Magnetic fluctuations caused by the nuclear spins of a host crystal are often the leading source of decoherence for many types of solid-state spin qubit. In group-IV materials, the spin-bearing nuclei are sufficiently rare that it is possible to identify and control individual host nuclear spins. This work presents the first experimental detection and manipulation of a single ${}^{29}$Si nuclear spin. The quantum non-demolition (QND) single-shot readout of the spin is demonstrated, and a Hahn echo measurement reveals a coherence time of $T_2=6.3(7)$ ms - in excellent agreement with bulk experiments. Atomistic modeling combined with extracted experimental parameters provides possible lattice sites for the ${}^{29}$Si atom under investigation. These results demonstrate that single ${}^{29}$Si nuclear spins could serve as a valuable resource in a silicon spin-based quantum computer.

References in corpus (6)

• High-fidelity projective readout of a solid-state spin quantum register
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Topological quantum computing with a very noisy network and local error rates approaching one percent
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Architecture for high-sensitivity single-shot readout and control of the electron spin of individual donors in silicon
• Nanoscale broadband transmission lines for spin qubit control

Cited by in corpus (4)

• Engineering telecom single-photon emitters in silicon for scalable quantum photonics
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon
• Decoherence of nuclear spins in the "frozen core" of an electron spin
• Keeping a spin qubit alive in natural silicon: Comparing optimal working points and dynamical decoupling