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Towards a Programmable Nanomechanica...

Fung, Long Fung Frankie,

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Towards a Programmable Nanomechanical Interface for Mediating Spin-Spin Interactions /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Towards a Programmable Nanomechanical Interface for Mediating Spin-Spin Interactions // Long Fung Frankie Fung.
Author:	Fung, Long Fung Frankie,
Description:	1 electronic resource (210 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
Contained By:	Dissertations Abstracts International86-12B.
Subject:	Physics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31995350
ISBN:	9798280710146

Towards a Programmable Nanomechanical Interface for Mediating Spin-Spin Interactions /
Fung, Long Fung Frankie,

Towards a Programmable Nanomechanical Interface for Mediating Spin-Spin Interactions /Long Fung Frankie Fung. - 1 electronic resource (210 pages)

Source: Dissertations Abstracts International, Volume: 86-12, Section: B.

Solid state spin qubits are promising candidates for quantum information processing. In particular, the nitrogen vacancy (NV) center in diamond is known to have coherence times exceeding milliseconds even at room temperature. However, due to the limits of qubit fabrication and the short-range nature of magnetic dipolar interactions, it remains difficult to generate programmable interactions between a large number of NV centers. To address this challenge, it has been proposed to use nanomechanical resonators as a mesoscopic interface between solid state spin qubits. In this thesis, I will describe experimental efforts in building a scanning probe platform, where individual NV centers in diamond nanopillars are coupled to magnetially functionalized silicon nitride mechanical resonators. The scanning probe configuration enables programmable connectivity via mechanical transport of the nanopillars. Proof-of-principle measurements show that the coherence of the NV center is preserved despite relative movement in a magnetic field gradient, by utilizing the nitrogen nuclear spin as a quantum memory. I will also describe measurements of the spin-mechanical coupling via both DC and AC magnetometry. Finally, I present some preliminary results related to sensing of a single NV center with the mechanical resonator, which demonstrate the high level of control over each subsystem. With realistic improvements to several system parameters, high spin-mechanical cooperativities are feasible, offering a new avenue towards scalable quantum information processing with spin qubits.

English

ISBN: 9798280710146Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Nitrogen vacancy

Towards a Programmable Nanomechanical Interface for Mediating Spin-Spin Interactions /
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520 $a Solid state spin qubits are promising candidates for quantum information processing. In particular, the nitrogen vacancy (NV) center in diamond is known to have coherence times exceeding milliseconds even at room temperature. However, due to the limits of qubit fabrication and the short-range nature of magnetic dipolar interactions, it remains difficult to generate programmable interactions between a large number of NV centers. To address this challenge, it has been proposed to use nanomechanical resonators as a mesoscopic interface between solid state spin qubits. In this thesis, I will describe experimental efforts in building a scanning probe platform, where individual NV centers in diamond nanopillars are coupled to magnetially functionalized silicon nitride mechanical resonators. The scanning probe configuration enables programmable connectivity via mechanical transport of the nanopillars. Proof-of-principle measurements show that the coherence of the NV center is preserved despite relative movement in a magnetic field gradient, by utilizing the nitrogen nuclear spin as a quantum memory. I will also describe measurements of the spin-mechanical coupling via both DC and AC magnetometry. Finally, I present some preliminary results related to sensing of a single NV center with the mechanical resonator, which demonstrate the high level of control over each subsystem. With realistic improvements to several system parameters, high spin-mechanical cooperativities are feasible, offering a new avenue towards scalable quantum information processing with spin qubits.
546 $a English
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650 4 $a Physics. $3 516296
650 4 $a Quantum physics. $3 726746
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653 $a Nitrogen vacancy
653 $a Quantum information
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653 $a Nanomechanical resonators
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710 2 $a Harvard University. $b Physics. $e degree granting institution. $3 3765677
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791 $a Ph.D.
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