Control of individual electron-spin pairs in an electron-spin bath

H. P. Bartling; N. Demetriou; N. C.F. Zutt; D. Kwiatkowski; M. J. Degen; S. J.H. Loenen; C. E. Bradley; M. Markham; D. J. Twitchen; T. H. Taminiau

doi:10.1103/PhysRevResearch.7.013333

Control of individual electron-spin pairs in an electron-spin bath

H. P. Bartling, N. Demetriou, N. C.F. Zutt, D. Kwiatkowski, M. J. Degen, S. J.H. Loenen, C. E. Bradley, M. Markham, D. J. Twitchen, T. H. Taminiau^*

^*Corresponding author for this work

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Abstract

The decoherence of a central electron spin due to the dynamics of a coupled electron-spin bath is a core problem in solid-state spin physics. Ensemble experiments have studied the central spin coherence in detail, but such experiments average out the underlying quantum dynamics of the bath. Here, we show the coherent back-action of an individual NV center on an electron-spin bath and use it to detect, prepare, and control the dynamics of a pair of bath spins. We image the NV-pair system with subnanometer resolution and reveal a long dephasing time [T2∗=44(9) ms] for a qubit encoded in the electron-spin pair. Our experiment reveals the microscopic quantum dynamics that underlie the central spin decoherence and provides new opportunities for controlling and sensing interacting spin systems.

Original language	English
Article number	013333
Number of pages	6
Journal	Physical Review Research
Volume	7
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevResearch.7.013333
Publication status	Published - 2025

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title = "Control of individual electron-spin pairs in an electron-spin bath",

abstract = "The decoherence of a central electron spin due to the dynamics of a coupled electron-spin bath is a core problem in solid-state spin physics. Ensemble experiments have studied the central spin coherence in detail, but such experiments average out the underlying quantum dynamics of the bath. Here, we show the coherent back-action of an individual NV center on an electron-spin bath and use it to detect, prepare, and control the dynamics of a pair of bath spins. We image the NV-pair system with subnanometer resolution and reveal a long dephasing time [T2∗=44(9) ms] for a qubit encoded in the electron-spin pair. Our experiment reveals the microscopic quantum dynamics that underlie the central spin decoherence and provides new opportunities for controlling and sensing interacting spin systems.",

author = "Bartling, {H. P.} and N. Demetriou and Zutt, {N. C.F.} and D. Kwiatkowski and Degen, {M. J.} and Loenen, {S. J.H.} and Bradley, {C. E.} and M. Markham and Twitchen, {D. J.} and Taminiau, {T. H.}",

year = "2025",

doi = "10.1103/PhysRevResearch.7.013333",

language = "English",

volume = "7",

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T1 - Control of individual electron-spin pairs in an electron-spin bath

AU - Bartling, H. P.

AU - Demetriou, N.

AU - Zutt, N. C.F.

AU - Kwiatkowski, D.

AU - Degen, M. J.

AU - Loenen, S. J.H.

AU - Bradley, C. E.

AU - Markham, M.

AU - Twitchen, D. J.

AU - Taminiau, T. H.

PY - 2025

Y1 - 2025

N2 - The decoherence of a central electron spin due to the dynamics of a coupled electron-spin bath is a core problem in solid-state spin physics. Ensemble experiments have studied the central spin coherence in detail, but such experiments average out the underlying quantum dynamics of the bath. Here, we show the coherent back-action of an individual NV center on an electron-spin bath and use it to detect, prepare, and control the dynamics of a pair of bath spins. We image the NV-pair system with subnanometer resolution and reveal a long dephasing time [T2∗=44(9) ms] for a qubit encoded in the electron-spin pair. Our experiment reveals the microscopic quantum dynamics that underlie the central spin decoherence and provides new opportunities for controlling and sensing interacting spin systems.

AB - The decoherence of a central electron spin due to the dynamics of a coupled electron-spin bath is a core problem in solid-state spin physics. Ensemble experiments have studied the central spin coherence in detail, but such experiments average out the underlying quantum dynamics of the bath. Here, we show the coherent back-action of an individual NV center on an electron-spin bath and use it to detect, prepare, and control the dynamics of a pair of bath spins. We image the NV-pair system with subnanometer resolution and reveal a long dephasing time [T2∗=44(9) ms] for a qubit encoded in the electron-spin pair. Our experiment reveals the microscopic quantum dynamics that underlie the central spin decoherence and provides new opportunities for controlling and sensing interacting spin systems.

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DO - 10.1103/PhysRevResearch.7.013333

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Control of individual electron-spin pairs in an electron-spin bath

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