Quantum science with optical tweezer arrays of ultracold atoms and molecules

AM Kaufman, KK Ni - Nature Physics, 2021‏ - nature.com
Single atoms and molecules can be trapped in tightly focused beams of light that form
'optical tweezers', affording exquisite capabilities for the control and detection of individual …

Optical frequency combs: Coherently uniting the electromagnetic spectrum

SA Diddams, K Vahala, T Udem - Science, 2020‏ - science.org
BACKGROUND The generation and control of coherent electromagnetic waves, such as
those provided by electronic oscillators in the radio frequency domain or lasers in the optical …

Multi-qubit gates and Schrödinger cat states in an optical clock

A Cao, WJ Eckner, T Lukin Yelin, AW Young… - Nature, 2024‏ - nature.com
Many-particle entanglement is a key resource for achieving the fundamental precision limits
of a quantum sensor. Optical atomic clocks, the current state of the art in frequency precision …

Resolving the gravitational redshift across a millimetre-scale atomic sample

T Bothwell, CJ Kennedy, A Aeppli, D Kedar… - Nature, 2022‏ - nature.com
Einstein's theory of general relativity states that clocks at different gravitational potentials tick
at different rates relative to lab coordinates—an effect known as the gravitational redshift. As …

Realizing spin squeezing with Rydberg interactions in an optical clock

WJ Eckner, N Darkwah Oppong, A Cao, AW Young… - Nature, 2023‏ - nature.com
Neutral-atom arrays trapped in optical potentials are a powerful platform for studying
quantum physics, combining precise single-particle control and detection with a range of …

Clock with Systematic Uncertainty

A Aeppli, K Kim, W Warfield, MS Safronova, J Ye - Physical Review Letters, 2024‏ - APS
We report an optical lattice clock with a total systematic uncertainty of 8.1× 10-19 in fractional
frequency units, representing the lowest uncertainty of any clock to date. The clock relies on …

Frequency ratio measurements at 18-digit accuracy using an optical clock network

Nature, 2021‏ - nature.com
Atomic clocks are vital in a wide array of technologies and experiments, including tests of
fundamental physics. Clocks operating at optical frequencies have now demonstrated …

Direct comparison of two spin-squeezed optical clock ensembles at the 10−17 level

JM Robinson, M Miklos, YM Tso, CJ Kennedy… - Nature Physics, 2024‏ - nature.com
Building scalable quantum systems that demonstrate performance enhancement based on
entanglement is a major goal in quantum computing and metrology. The main challenge …

Free-space dissemination of time and frequency with 10−19 instability over 113 km

Q Shen, JY Guan, JG Ren, T Zeng, L Hou, M Li, Y Cao… - Nature, 2022‏ - nature.com
Networks of optical clocks find applications in precise navigation,, in efforts to redefine the
fundamental unit of the 'second',,–and in gravitational tests. As the frequency instability for …

20 years of developments in optical frequency comb technology and applications

T Fortier, E Baumann - Communications Physics, 2019‏ - nature.com
Optical frequency combs were developed nearly two decades ago to support the world's
most precise atomic clocks. Acting as precision optical synthesizers, frequency combs …