期刊
APPLIED PHYSICS LETTERS
卷 119, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0061010
关键词
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资金
- InnovateUK [103880, EP/R020086/1]
- Quantum Technology Hub EPSRC [EP/T001046/1, EP/M013294/1]
- EPSRC [EP/R020086/1] Funding Source: UKRI
- Innovate UK [103880] Funding Source: UKRI
Compact vacuum systems are essential for cold atom technologies, but existing systems can be large and require active pumping. This study presents a centiliter-scale ceramic vacuum chamber that enables robust laser cooling with minimal power consumption, showing promise for wide-ranging ultracold quantum metrology applications.
Compact vacuum systems are key enabling components for cold atom technologies, facilitating extremely accurate sensing applications. There has been important progress toward a truly portable compact vacuum system; however, size, weight, and power consumption can be prohibitively large, optical access may be limited, and active pumping is often required. Here, we present a centiliter-scale ceramic vacuum chamber with He-impermeable viewports and an integrated diffractive optic, enabling robust laser cooling with light from a single polarization-maintaining fiber. A cold atom demonstrator based on the vacuum cell delivers 10(7) laser-cooled Rb-87 atoms per second, using minimal electrical power. With continuous Rb gas emission, active pumping yields a 10 - 7 mbar equilibrium pressure, and passive pumping stabilizes to 3 x 10 - 6 mbar with a 17 day time constant. A vacuum cell, with no Rb dispensing and only passive pumping, has currently kept a similar pressure for more than 500 days. The passive-pumping vacuum lifetime is several years, which is estimated from short-term He throughput with many foreseeable improvements. This technology enables wide-ranging mobilization of ultracold quantum metrology.
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