Jun Ye
University of Colorado Boulder
OpticsPhysicsFrequency combFemtosecondDipoleAtomic physicsChemistryMaterials scienceAtomic clockCondensed matter physicsSpectroscopyMoleculeOptoelectronicsLaserQuantum mechanicsQuantumOptical lattice
1,124Publications
126H-index
36.8kCitations
Publications 834
Newest
#1Qizhong Liang (CU: University of Colorado Boulder)
#2Ya-Chu Chan (CU: University of Colorado Boulder)
Last. Jutta Toscano (CU: University of Colorado Boulder)
view all 6 authors...
Breath analysis enables rapid, noninvasive diagnostics, as well as long-term monitoring of human health, through the identification and quantification of exhaled biomarkers. Here, we demonstrate the remarkable capabilities of mid-infrared (mid-IR) cavity-enhanced direct-frequency comb spectroscopy (CE-DFCS) applied to breath analysis. We simultaneously detect and monitor as a function of time four breath biomarkers-[Formula: see text]OH, [Formula: see text], [Formula: see text]O, and HDO-as well...
Source
#1Piotr Wcisło (NIST: National Institute of Standards and Technology)H-Index: 17
#2Hao Wu (NIST: National Institute of Standards and Technology)H-Index: 1
Last. Jun Ye (NIST: National Institute of Standards and Technology)H-Index: 126
view all 5 authors...
Abstract null null By enabling precise control over longitudinal velocity of neutral molecules, Stark deceleration has become an important tool for studying cold molecular collisions. However, the information about transverse motion is often hard to extract and to some extent beyond control. Here we demonstrate a new experimental approach that allows us to observe the transverse phase-space distribution of molecules within a Stark decelerator. The transverse dynamics can be tracked along the dec...
Source
#1Tobias BothwellH-Index: 6
#2Colin KennedyH-Index: 10
Last. Jun YeH-Index: 126
view all 8 authors...
Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates - an effect known as the gravitational redshift. As fundamental probes of space and time, atomic clocks have long served to test this prediction at distance scales from 30 centimeters to thousands of kilometers. Ultimately, clocks will study the union of general relativity and quantum mechanics once they become sensitive to the finite wavefunction of quantum objects oscillatin...
#1Jun-Ru Li (NIST: National Institute of Standards and Technology)H-Index: 8
#2William G. Tobias (NIST: National Institute of Standards and Technology)H-Index: 3
Last. John L. Bohn (NIST: National Institute of Standards and Technology)H-Index: 63
view all 11 authors...
Ultracold polar molecules possess long-range, anisotropic and tunable dipolar interactions, providing opportunities to probe quantum phenomena that are inaccessible with existing cold gas platforms. However, experimental progress has been hindered by the dominance of two-body loss over elastic interactions, which prevents efficient evaporative cooling. Although recent work has demonstrated controlled interactions by confining molecules to a two-dimensional geometry, a general approach for tuning...
Source
#1Thomas BilitewskiH-Index: 8
Last. Ana Maria Rey (NIST: National Institute of Standards and Technology)H-Index: 62
view all 9 authors...
The observation of Pauli blocking of atomic spontaneous decay via direct measurements of the atomic population requires the use of long-lived atomic gases where quantum statistics, atom recoil and cooperative radiative processes are all relevant. We develop a theoretical framework capable of simultaneously accounting for all these effects in a regime where prior theoretical approaches based on semi-classical non-interacting or interacting frozen atom approximations fail. We apply it to atoms in ...
#1Yewei Wu (CU: University of Colorado Boulder)H-Index: 3
#2Justin J. BurauH-Index: 2
Last. Shiqian DingH-Index: 10
view all 5 authors...
We report laser cooling and trapping of yttrium monoxide (YO) molecules in an optical lattice. We show that gray molasses cooling remains exceptionally efficient for YO molecules inside the lattice with a molecule temperature as low as 6.1(6) \mu. This approach has produced a trapped sample of 1200 molecules, with a peak spatial density of \sim1.2\times10^{10}cm^{-3} and a peak phase-space density of \sim3.1\times10^{-6} By adiabatically ramping down the lattice depth, we cool the mo...
2 Citations
#1A. CidrimH-Index: 5
#2A. Piñeiro OrioliH-Index: 1
Last. Ana Maria ReyH-Index: 62
view all 7 authors...
Dipole-dipole interactions lead to frequency shifts that are expected to limit the performance of next-generation atomic clocks. In this work, we compute dipolar frequency shifts accounting for the intrinsic atomic multilevel structure in standard Ramsey spectroscopy. When interrogating the transitions featuring the smallest Clebsch-Gordan coefficients, we find that a simplified two-level treatment becomes inappropriate, even in the presence of large Zeeman shifts. For these cases, we show a net...
1 CitationsSource
#1Thomas SchusterH-Index: 8
#2Felix FlickerH-Index: 14
Last. Norman Y. YaoH-Index: 43
view all 7 authors...
The Hopf insulator represents a topological state of matter that exists outside the conventional ten-fold way classification of topological insulators. Its topology is protected by a linking number invariant, which arises from the unique topology of knots in three dimensions. We predict that three-dimensional arrays of driven, dipolar-interacting spins are a natural platform to experimentally realize the Hopf insulator. In particular, we demonstrate that certain terms within the dipolar interact...
2 CitationsSource
#1Thomas Schuster (University of California, Berkeley)H-Index: 8
#2Felix Flicker (University of Oxford)H-Index: 14
Last. Norman Y. Yao (LBNL: Lawrence Berkeley National Laboratory)H-Index: 43
view all 7 authors...
We present a quantitative, near-term experimental blueprint for the quantum simulation of topological insulators using lattice-trapped ultracold polar molecules. In particular, we focus on the so-called Hopf insulator, which represents a three-dimensional topological state of matter existing outside the conventional tenfold way and crystalline-symmetry-based classifications of topological insulators. Its topology is protected by a \emph{linking number} invariant, which necessitates long-range sp...
1 CitationsSource