Imaging Optical Frequencies with 
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 Precision and 
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 Resolution

Marti, G. Edward; Hutson, Ross B.; Goban, Akihisa; Campbell, Scott; Poli, N.; Ye, Jun

doi:10.1103/physrevlett.120.103201

Cited by 179 publications

(124 citation statements)

References 51 publications

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“…From this expression, one can see w MF opt is not highly sensitive to variations in the cavity linewidth, κ, but on the contrary it is linearly sensitive to variations on δ c and N. Systematics in the cavity detuning, nevertheless, can be currently controlled at the subhertz level by locking the cavity to a state-of-the-art clock laser [58]. Fluctuations in N can be also suppressed by operating the system in a three dimensional optical lattice in the band or Mott insulator regimes [59] and spectroscopically selecting a fixed region of the atomic array [60].…”

Section: Experimental Realization and Outlookmentioning

confidence: 99%

Shattered time: can a dissipative time crystal survive many-body correlations?

et al. 2018

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We investigate the emergence of a time crystal (TC) in a driven dissipative many-body spin array. In this system the interplay between incoherent spin pumping and collective emission stabilizes a synchronized non-equilibrium steady state which in the thermodynamic limit features a self-generated time-periodic pattern imposed by collective elastic interactions. In contrast to prior realizations where the time symmetry is already broken by an external drive, here it is only spontaneously broken by the elastic exchange interactions and manifest in the two-time correlation spectrum. Employing a combination of exact numerical calculations and a second-order cumulant expansion, we investigate the impact of many-body correlations on the TC formation and establish a connection between the regime where it is stable and where the system features a slow growth rate of the mutual information. This observation allows us to conclude that the TC studied here is an emergent semi-classical out-of-equilibrium state of matter. We also confirm the rigidity of the TC to single-particle dephasing. Finally, we discuss an experimental implementation using long lived dipoles in an optical cavity.

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Section: Experimental Realization and Outlookmentioning

confidence: 99%

Shattered time: can a dissipative time crystal survive many-body correlations?

et al. 2018

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“…The work in this paper is closely tied to the experimental work reported in [34]; we begin with a short summary of the relevant experimental procedures therein. The experiment begins by preparing a degenerate gas of 10 4 -10 5 (fermionic) 87 Sr atoms in a uniform mixture of their ten nuclear spin states and at ∼0.1 of their Fermi temperature (∼10 nanokelvin) [8,40]. This gas is loaded into a primitive cubic optical lattice at the 'magic wavelength' for which both ground ( S 1 0 ) and first-excited ( P 3 0 ) electronic orbital states of the atoms experience the same lattice potential [41].…”

Section: Background and Overviewmentioning

confidence: 99%

Effective multi-body SU(N)-symmetric interactions of ultracold fermionic atoms on a 3D lattice

Perlin

Rey

2019

New J. Phys.

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Rapid advancements in the experimental capabilities with ultracold alkaline-earth-like atoms (AEAs) bring to a surprisingly near term the prospect of performing quantum simulations of spin models and lattice field theories exhibiting SU(N) symmetry. Motivated in particular by recent experiments preparing high density samples of strongly interacting 87 Sr atoms in a three-dimensional optical lattice, we develop a low-energy effective theory of fermionic AEAs which exhibits emergent multibody SU(N)-symmetric interactions, where N is the number of atomic nuclear spin levels. Our theory is limited to the experimental regime of (i) a deep lattice, with (ii) at most one atom occupying each nuclear spin state on any lattice site. The latter restriction is a consequence of initial ground-state preparation. We fully characterize the low-lying excitations in our effective theory, and compare predictions of many-body interaction energies with direct measurements of many-body excitation spectra in an optical lattice clock. Our work makes the first step in enabling a controlled, bottom-up experimental investigation of multi-body SU(N) physics. 1 0 and P 3 0 states, AEAs exhibit decoupled orbital and OPEN ACCESS RECEIVED

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“…Only atoms which experience a Zeeman shift that matches the microwave transition frequencies of the narrow transfer window are transferred to the F=7/2 manifold, and are not affected by the optical removal pulse. By imaging the spatial distribution of remaining atoms with fluorescence imaging, we can infer the distribution of the transition frequencies and the magnetic field strengths, a technique referred to as spectral imaging [25].…”

Section: Imaging Magnetic Field Inhomogeneitiesmentioning

confidence: 99%

“…When optimizing our scheme, we observed fast inelastic collisions that only arise when the atoms are in different spin states of the upper hyperfine manifold of the ground state. The frequency sensitivity of the pulses also allowed us to perform spectral imaging [24,25] and visualize our magnetic field gradients directly on a fluorescence image.…”

Section: Introductionmentioning

confidence: 99%

Microwave preparation of two-dimensional fermionic spin mixtures

et al. 2019

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We present a method for preparing a single two-dimensional sample of a two-spin mixture of fermionic potassium in a single antinode of an optical lattice, in a quantum-gas microscope apparatus. Our technique relies on spatially-selective microwave transitions in a magnetic field gradient. Adiabatic transfer pulses were optimized for high efficiency and minimal atom loss and heating due to spin-changing collisions. We have measured the dynamics of those loss processes, which are more pronounced in the presence of a spin mixture. As the efficient preparation of atoms in a single antinode requires a homogeneous transverse magnetic field, we developed a method to image and minimize the magnetic field gradients in the focal plane of the microscope.

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Imaging Optical Frequencies with 100 μHz Precision and 1.1 μm Resolution

Cited by 179 publications

References 51 publications

Shattered time: can a dissipative time crystal survive many-body correlations?

Shattered time: can a dissipative time crystal survive many-body correlations?

Effective multi-body SU(N)-symmetric interactions of ultracold fermionic atoms on a 3D lattice

Microwave preparation of two-dimensional fermionic spin mixtures

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