Quantum-based mechanical force realization in piconewton range

Jae Hyuk Choi, Min Seok Kim, Yon Kyu Park, Mahn Soo Choi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Mechanical force realization based on flux quantization in the piconewton range is proposed. By controlling the number of flux quantum in a superconducting annulus, a force can be created as integer multiples of a constant step. For a 50 nm thick Nb annulus with inner and outer radii of 5 and 10 μm, respectively, and field gradient of 10 Tm, the force step is estimated to be 184 fN. The stability against thermal fluctuations is also addressed.

Original languageEnglish
Article number073117
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 2007

Bibliographical note

Funding Information:
One of the authors (M.-S.C.) was supported by SRC/ERC (R11-2000-071) and KRF Grants (KRF-2005-070-C00055 and KRF-2006-312-C00543).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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