期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.213003
关键词
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资金
- ARC Centre of Excellence for Engineered Quantum Systems [CE110001013]
- NSF [DMR-1004268]
- Georgetown University
- DARPA-OLE
- NIST
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1004268] Funding Source: National Science Foundation
We demonstrate spectroscopy and thermometry of individual motional modes in a mesoscopic 2D ion array using entanglement-induced decoherence as a method of transduction. Our system is a similar to 400 mu m-diameter planar crystal of several hundred Be-9(+) ions exhibiting complex drumhead modes in the confining potential of a Penning trap. Exploiting precise control over the Be-9(+) valence electron spins, we apply a homogeneous spin-dependent optical dipole force to excite arbitrary transverse modes with an effective wavelength approaching the interparticle spacing (similar to 20 mu m). Center-of-mass displacements below 1 nm are detected via the entanglement of spin and motional degrees of freedom.
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