Probing phase coherence in solid helium using torsional oscillators of different path lengths

Duk Y. Kim; Joshua T. West; Tyler A. Engstrom; Norbert Mulders; Moses H.W. Chan

doi:10.1103/PhysRevB.85.024533

Probing phase coherence in solid helium using torsional oscillators of different path lengths

Duk Y. Kim, Joshua T. West, Tyler A. Engstrom, Norbert Mulders, Moses H.W. Chan

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16 Scopus citations

Abstract

Long-range phase coherence is a critical signature of macroscopic quantum phenomena. To date, nonclassical rotational inertia (NCRI) of solid helium has been reported only in samples with physical dimension of at most 5 cm. We have investigated solid helium in longer path-length torsional oscillators. Samples of length ranging from 6 to 100 cm were grown inside toroids and in self-connected long capillaries. NCRI of 4×10 ^-5 and 3×10 ^-5 were found in cells with path length of 6 and 9 cm. In cells with path length of 30 and 100 cm, NCRI, if it exists, is less than 7×10 ^-5 and 4×10 ^-5, respectively.

Original language	English (US)
Article number	024533
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.85.024533
State	Published - Jan 24 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.85.024533

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abstract = "Long-range phase coherence is a critical signature of macroscopic quantum phenomena. To date, nonclassical rotational inertia (NCRI) of solid helium has been reported only in samples with physical dimension of at most 5 cm. We have investigated solid helium in longer path-length torsional oscillators. Samples of length ranging from 6 to 100 cm were grown inside toroids and in self-connected long capillaries. NCRI of 4×10 -5 and 3×10 -5 were found in cells with path length of 6 and 9 cm. In cells with path length of 30 and 100 cm, NCRI, if it exists, is less than 7×10 -5 and 4×10 -5, respectively.",

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doi = "10.1103/PhysRevB.85.024533",

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AU - Kim, Duk Y.

AU - West, Joshua T.

AU - Engstrom, Tyler A.

AU - Mulders, Norbert

AU - Chan, Moses H.W.

PY - 2012/1/24

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N2 - Long-range phase coherence is a critical signature of macroscopic quantum phenomena. To date, nonclassical rotational inertia (NCRI) of solid helium has been reported only in samples with physical dimension of at most 5 cm. We have investigated solid helium in longer path-length torsional oscillators. Samples of length ranging from 6 to 100 cm were grown inside toroids and in self-connected long capillaries. NCRI of 4×10 -5 and 3×10 -5 were found in cells with path length of 6 and 9 cm. In cells with path length of 30 and 100 cm, NCRI, if it exists, is less than 7×10 -5 and 4×10 -5, respectively.

AB - Long-range phase coherence is a critical signature of macroscopic quantum phenomena. To date, nonclassical rotational inertia (NCRI) of solid helium has been reported only in samples with physical dimension of at most 5 cm. We have investigated solid helium in longer path-length torsional oscillators. Samples of length ranging from 6 to 100 cm were grown inside toroids and in self-connected long capillaries. NCRI of 4×10 -5 and 3×10 -5 were found in cells with path length of 6 and 9 cm. In cells with path length of 30 and 100 cm, NCRI, if it exists, is less than 7×10 -5 and 4×10 -5, respectively.

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Probing phase coherence in solid helium using torsional oscillators of different path lengths

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