Christian Sanner
University of Colorado Boulder
Elementary particlePauli exclusion principlePhysicsVortexIonDark matterExcited stateAtomPhysics beyond the Standard ModelAtomic physicsMaterials scienceAtomic clockSensitivity (control systems)Dimensionless quantityCondensed matter physicsComputational physicsFine-structure constantSpectroscopyBose–Einstein condensateMolecular physicsSymmetry (physics)FermionQuantum mechanicsDegenerate energy levelsFermi gasQuantum sensorOptical lattice
68Publications
19H-index
1,996Citations
Publications 60
Newest
#1Christian Sanner (MIT: Massachusetts Institute of Technology)H-Index: 19
#2Edward J. Su (MIT: Massachusetts Institute of Technology)H-Index: 7
Last. Wolfgang Ketterle (MIT: Massachusetts Institute of Technology)H-Index: 107
view all 7 authors...
Spin fluctuations and density fluctuations are studied for a two-component gas of strongly interacting fermions along the Bose-Einstein condensate-BCS crossover. This is done by in situ imaging of dispersive speckle patterns. Compressibility and magnetic susceptibility are determined from the measured fluctuations. This new sensitive method easily resolves a tenfold suppression of spin fluctuations below shot noise due to pairing, and can be applied to novel magnetic phases in optical lattices.
Source
#1Christian Sanner (MIT: Massachusetts Institute of Technology)H-Index: 19
#2Edward J. SuH-Index: 7
Last. Wolfgang KetterleH-Index: 107
view all 7 authors...
We study density profiles of an ideal Fermi gas and observe Pauli suppression of density fluctuations (atom shot noise) for cold clouds deep in the quantum degenerate regime. Strong suppression is observed for probe volumes containing more than 10 000 atoms. Measuring the level of suppression provides sensitive thermometry at low temperatures. After this method of sensitive noise measurements has been validated with an ideal Fermi gas, it can now be applied to characterize phase transitions in s...
Source
#1David E. Miller (Harvard University)H-Index: 19
#2J. K. Chin (Harvard University)H-Index: 6
Last. Wolfgang Ketterle (Harvard University)H-Index: 107
view all 7 authors...
Critical velocities have been observed in an ultracold superfluid Fermi gas throughout the BEC-BCS crossover. A pronounced peak of the critical velocity at unitarity demonstrates that superfluidity is most robust for resonant atomic interactions. Critical velocities were determined from the abrupt onset of dissipation when the velocity of a moving one-dimensional optical lattice was varied. The dependence of the critical velocity on lattice depth and on the inhomogeneous density profile was stud...
Source
#1J. K. Chin (MIT: Massachusetts Institute of Technology)H-Index: 4
#2D. E. Miller (MIT: Massachusetts Institute of Technology)H-Index: 1
Last. Wolfgang Ketterle (MIT: Massachusetts Institute of Technology)H-Index: 107
view all 8 authors...
Evidence for superfluidity of ultracold fermionic atom pairs in an optical lattice details that such systems are highly controllable, making them attractive models for studying analogous problems such as high-temperature superconductivity.
Source
#1J. K. ChinH-Index: 4
#2David E. MillerH-Index: 19
Last. Wolfgang KetterleH-Index: 107
view all 8 authors...
#1Gyu-Boong JoH-Index: 16
#2Yong-il ShinH-Index: 35
Last. Mara PrentissH-Index: 48
view all 10 authors...
We have used a microfabricated atom chip to split a single Bose-Einstein condensate of sodium atoms into two spatially separated condensates. Dynamical splitting was achieved by deforming the trap along the tightly confining direction into a purely magnetic double-well potential. We observed the matter wave interference pattern formed upon releasing the condensates from the microtraps. The intrinsic features of the quartic potential at the merge point, such as zero trap frequency and extremely h...
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