Energy distribution and cooling of a single atom in an optical tweezer

By C. Tuchendler, A. Lance, Antoine Browaeys, Y. Sortais, Philippe Grangier. 2008

150 citations recorded by the source corpus.

We investigate experimentally the energy distribution of a single 87 Rb atom trapped in a strongly focused dipole trap under various cooling regimes. Using two different methods to measure the mean energy of the atom, we show that the energy distribution of the radiatively cooled atom is close to thermal. We then demonstrate how to reduce the energy of the single atom, first by adiabatic cooling, and then by truncating the Boltzmann distribution of the single atom. This provides a nondeterministic way to prepare atoms at low micro-K temperatures, close to the ground state of the trapping potential.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/ec77b489695bd10cefe4c4e557c262d2a422e3ab

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Cooling a Single Atom in an Optical Tweezer to Its Quantum Ground State (2012, methodology): “For loading into the tweezer trap, the F = 2− 3′ light is detuned 60 MHz red of the bare optical transition; the PGC to prepare for Raman cooling uses light 23 MHz red of the bare optical transition [33].”
Midcircuit Operations Using the omg Architecture in Neutral Atom Arrays (2023, methodology): “The temperature is determined by comparing results of a release-and-recapture experiment and a Monte Carlo simulation for an atom of a certain temperature [98].”
Preparation of a single atom in an optical microtrap (2010, methodology): “They also restore the final temperature of a single trapped atom of 450±50 μK, as measured by the release and recapture techniqu”
Ytterbium Nuclear-Spin Qubits in an Optical Tweezer Array (2021, methodology): “To assess the efficiency of cooling under these conditions, we compare release-and-recapture measurements to a Monte Carlo simulation, to extract the atomic temperature [61].”
Analysis of imperfections in the coherent optical excitation of single atoms to Rydberg states (2018, methodology): “We observe that the release and recapture measurement [36] of a Rydberg atom |r〉 is strongly affected by the slight antitrapping and drops quickly to zero after ∼10 μs.”
Alkaline-Earth Atoms in Optical Tweezers (2018, methodology): “The cumulative energy distribution of the atom before the ramp-down, FðE=U0Þ, is obtained from the survival probability of the atom in the trap, psðU=U0Þ, after converting the trap depthU=U0 to the initial energy of the atom E=U0 using the conservation of action argument [59].”