Fast and dense magneto-optical traps for strontium

Snigirev, Stepan; Park, Annie Jihyun; Heinz, A.; Bloch, Immanuel; Blatt, Sebastian

doi:10.1103/physreva.99.063421

Cited by 27 publications

(27 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After construction and characterization, the assembly was mounted in a stainless steel vacuum chamber attached to the vacuum system [33]. In Fig.…”

Section: Experimental Setup a Crossed Cavitiesmentioning

confidence: 99%

Cavity-enhanced optical lattices for scaling neutral atom quantum technologies

Park,

Trautmann,

Šantić

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

We demonstrate a cavity-based solution to scale up experiments with ultracold atoms in optical lattices by an order of magnitude over state-of-the-art free space lattices. Our two-dimensional optical lattices are created by power enhancement cavities with large mode waists of 489(8) µm and allow us to trap ultracold strontium atoms at a lattice depth of 60 µK by using only 80 mW of input light per cavity axis. We characterize these lattices using high-resolution clock spectroscopy and resolve carrier transitions between different vibrational levels. We use these spectral features to locally measure the lattice potential envelope and the sample temperature with a spatial resolution limited only by the optical resolution of the imaging system. The measured ground-band and trap lifetimes are 18(3) s and 59(2) s, respectively, and the lattice frequency (depth) is long-term stable on the MHz (0.1%) level. Our results show that large, deep, and stable two-dimensional cavityenhanced lattices can be created at any wavelength and can be used to scale up neutral-atom-based quantum simulators, quantum computers, sensors, and optical lattice clocks.

show abstract

“…After construction and characterization, the assembly was mounted in a stainless steel vacuum chamber attached to the vacuum system [33]. In Fig.…”

Section: Experimental Setup a Crossed Cavitiesmentioning

confidence: 99%

Cavity-enhanced optical lattices for scaling neutral atom quantum technologies

Park,

Trautmann,

Šantić

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The "red" MOT stage operates in two phases. The sawtooth wave adiabatic passage (SWAP) technique [35,36] is applied during an initial broadband phase wherein the laser detuning is swept at a rate of 40 kHz in a triangle waveform from ∆ − /2π = −10 MHz to ∆ + /2π = +200 kHz followed by a lower power, single frequency phase with the detuning fixed at ∆/2π = −290 kHz. At the end of both phases, we capture 5×10 5 atoms on average.…”

Section: Acknowledgementsmentioning

confidence: 99%

Magic wavelengths of the Sr ($5s^2\;^1\!S_0$--$5s5p\;^3\!P_1$) intercombination transition near the $5s5p\;^3\!P_1$--$5p^2\;^3\!P_2$ transition

Kestler,

Ton,

Filin

et al. 2021

Preprint

View full text Add to dashboard Cite

Predicting magic wavelengths accurately requires precise knowledge of electric-dipole matrix elements of nearby atomic transitions. As a result, measurements of magic wavelengths allow us to test theoretical predictions for the matrix elements that frequently can not be probed by any other methods. Here, we calculate and measure a magic wavelength near 473 nm of the 5s 2 1 S0−5s5p 3 P1 intercombination transition of 88 Sr. Experimentally, we find 473.361(4) nm for ∆m = 0 (π-transition) and 473.133( 14) nm for ∆m = −1 (σ − -transition). Theoretical calculations yield 473.375( 22) nm and 473.145(20) nm, respectively. The 3 P1 polarizability is dominated by the contributions to the 5p 2 3 P levels and excellent agreement of theory and experiment validates both theoretical values of these matrix elements and estimates of their uncertainties.

show abstract

“…As was found in Refs. [5][6][7][8][9], SWAP cooling does not achieve a temperature as low as that from Doppler cooling; for the range plotted in Fig. 1, the asymptotic temperature was more than ∼ 10X the Doppler temperature for ev- eryω r .…”

Section: A No Leak B = 0: Steady State Vsωrmentioning

confidence: 99%

“…Finally, as was seen in Refs. [5][6][7][8][9], the simulations showed that the kinetic energy is extracted from the atom much faster using SWAP than using Doppler cooling.…”

Section: A No Leak B = 0: Steady State Vsωrmentioning

confidence: 99%

Simulations of sawtooth-wave adiabatic passage with losses

2020

View full text Add to dashboard Cite

The results of simulations of cooling based on Sawtooth-Wave Adiabatic Passage (SWAP) are presented including the possibility of population leaking to states outside of the cycling transition. The amount of population leaking can be substantially suppressed compared to Doppler cooling, which could be useful for systems that are difficult to repump back to the cycling transition. The suppression of the leaked population was more effective when simulating the slowing of a beam than in cooling a thermal distribution. As expected, calculations of the leaked population versus branching ratio of spontaneous emission show that the suppression is more effective for narrow linewidth transitions. In this limit, using SWAP to slow a beam may be worth pursuing even when the branching ratio out of the cycling transition is greater than 10%.

show abstract

Fast and dense magneto-optical traps for strontium

Cited by 27 publications

References 36 publications

Cavity-enhanced optical lattices for scaling neutral atom quantum technologies

Cavity-enhanced optical lattices for scaling neutral atom quantum technologies

Magic wavelengths of the Sr ($5s^2\;^1\!S_0$--$5s5p\;^3\!P_1$) intercombination transition near the $5s5p\;^3\!P_1$--$5p^2\;^3\!P_2$ transition

Simulations of sawtooth-wave adiabatic passage with losses

Contact Info

Product

Resources

About