Thermal atoms are an attractive platform for quantum information. A typical atomic vapor cell contains billions of identical quantum systems, an extremely large and easily accessible resource. However, harnessing this resource for quantum information is challenging due to the broad velocity distribution of thermal vapors. In this work we describe how we use atomic beams and velocity selection to observe atoms one-by-one, and to create a basic building block of a "bottom-up" approach to quantum information using thermal atoms.
Atom beams are a longstanding technology for atom-based sensors and clocks. Here, we demonstrate integration of miniature Rb atomic beam using lithographically defined components and passive pumping in a cm-scale device. The device consists of two cavities connected by a series of lithographically defined channels, and the device is fabricated from stack of Si and glass layers which are anodically bonded to form a hermetically seal. The first cavity contains a vapor of atomic Rb which feeds the channel array to produce a set of atomic beams in the second cavity. The channels also provide differential pumping between the two regions, which paired graphite and non-evaporable getters pumps background gases in the second cavity. We present spectroscopy of the atom beam and Rb vapor in the device and comment on the prospects for miniaturized atomic beam clocks.
Neutral atoms and nanophotonics: a platform for quantum devices on chip was recorded at SPIE Photonics West held in San Francisco, California, United States 2022.
We demonstrate high quality factor (high-Q) air-clad optical microresonator in a thinfilm LPCVD-SiN, with loaded quality factor of 1.55 M at the near visible wavelength, suitable for interaction with Rb atoms for single atom detection. This record is achieved with no chemical mechanical polishing or high-temperature post-processing, enabling future fully integrated devices with optoelectronic circuitry.
Atomic sensors—devices that utilize individual atoms as the sensing mechanism—offer enormous prospects for high sensitivity, accuracy and immunity to environmental noise. This is because such sensors leverage quantum mechanical properties of the atom such as internal energy level splittings that do not change with time and are immune to sensor fabrication errors. While some of these sensors are now commercially available, they are still bulky instruments that must be individually assembled by hand and will not be widely disseminated in their current form. In this talk I will discuss a new architecture for quantum sensors based on miniaturized atomic beams, with applications to clocks, gyroscopes and photonic quantum devices.
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