Quantum Manipulation of Ultracold Atoms in Photonic Systems

Quantum manipulation of ultracold atoms in photonic systems harnesses the interplay between light and matter at near-zero temperatures to explore fundamental physics and develop emerging quantum technologies. By confining atoms within engineered photonic structures such as hollow-core fibres, microcavities or nanophotonic waveguides, researchers achieve long coherence times, strong light–matter coupling and precise control of atomic motion. Optical lattices and frequency-comb lasers further enable tailored potentials, rapid cooling and state preparation. These platforms facilitate studies of many-body phenomena, quantum simulation of condensed-matter models and implementation of quantum information protocols. Practical applications span timekeeping with optical clocks, precision sensing of fields and forces, and scalable interfaces for quantum communication, promising compact, integrated devices with unprecedented performance.

Research from Nature Portfolio

Innovative work has demonstrated the embedding of ultracold strontium atoms in a hollow-core photonic crystal fibre featuring a magic-wavelength optical lattice. By trapping single atoms in a kagome-lattice geometry, atom–wall and atom–atom interactions are suppressed, yielding narrow spectroscopic lines and extended coherence times for precision metrology. Complementary research has employed a single mode of an optical frequency comb to laser-cool neutral rubidium atoms to near the Doppler limit. This approach paves the way for cooling species lacking continuous-wave ultraviolet sources by driving narrow two-photon transitions. Another advance utilises plasmonic nanoparticles to generate rapid, localised heating in vapour-filled photonic devices, enabling swift and repeatable control of alkali-atom density. This thermoplasmonic technique achieves high optical depths in milliseconds, supporting robust quantum memories and photon-photon logic in integrated platforms.

Quantum Manipulation of Ultracold Atoms in Photonic Systems publication trend

The graph below shows the total number of articles in quantum manipulation of ultracold atoms in photonic systems across all publications each year (not limited to Nature Index journals).

Technical terms

Ultracold atoms: Atoms cooled to temperatures near absolute zero, where quantum effects such as Bose–Einstein condensation become significant.

Hollow-core photonic crystal fibre: A microstructured optical fibre with a central hollow channel and periodic cladding, guiding light and confining atoms within the core.

Optical lattice: A periodic potential for atoms formed by the interference of counter-propagating laser beams, enabling precise trapping and manipulation.

Frequency comb: A laser source emitting a spectrum of discrete, equally spaced frequency lines used for high-precision spectroscopy and novel cooling methods.

Magic wavelength: A specific laser wavelength at which two atomic states experience identical light shifts, preserving spectroscopic accuracy.

Electromagnetically induced transparency: A quantum interference effect that renders an otherwise opaque medium transparent to a probe beam under the influence of a control field.

Optical depth: A dimensionless measure of the absorption or interaction strength of light as it propagates through a medium of atoms.

References

1. Direct Frequency Comb Laser Cooling and Trapping. Physical Review X (2016).
2. Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications. Nature Communications (2019).
3. Single-photon-level narrowband memory in a hollow-core photonic bandgap fiber.. Optics Express (2020).
4. Spatially resolved spectroscopy of alkali metal vapour diffusing inside hollow-core photonic crystal fibres. New Journal of Physics (2022).
5. Cooling of atoms using an optical frequency comb. Scientific Reports (2019).