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Cooling fermions in optical lattices by faster entropy redistribution

Rafael Poliseli Teles, Tsung‐Lin Yang, Thereza Paiva +4 more

Bulletin of the American Physical SocietyMay 26, 20160 citations

Preparing Fermions in an Optical Lattice at Ultra-Low Temperature

Jamie R. Williams, R.W. Stites, J. H. Huckans +2 more

Bulletin of the American Physical SocietyJun 7, 20070 citations

Using the sudden expansion as a cooling scheme for interacting fermions in optical lattices

Fabian Heidrich‐Meisner, Salvatore R. Manmana, Marcos Rigol +3 more

Bulletin of the American Physical SocietyMay 26, 20100 citations

Site-Resolved Imaging of Fermionic Li 6 in an Optical Lattice

Maxwell F. Parsons, Florian Huber, Anton Mazurenko +5 more

We demonstrate site-resolved imaging of individual fermionic ^{6}Li atoms in a single layer of a 3D optical lattice. To preserve the density distribution during fluorescence imaging, we simultaneously cool the atoms with 3D Raman sideband cooling. This laser cooling technique, demonstrated here for the first time for ^{6}Li atoms, also provides a pathway to rapid low-entropy filling of an optical lattice. We are able to determine the occupation of individual lattice sites with a fidelity >95%, enabling direct, local measurement of particle correlations in Fermi lattice systems. This ability will be instrumental for creating and investigating low-temperature phases of the Fermi-Hubbard model, including antiferromagnets and d-wave superfluidity.We demonstrate site-resolved imaging of individual fermionic ^{6}Li atoms in a single layer of a 3D optical lattice. To preserve the density distribution during fluorescence imaging, we simultaneously cool the atoms with 3D Raman sideband cooling. This laser cooling technique, demonstrated here for the first time for ^{6}Li atoms, also provides a pathway to rapid low-entropy filling of an optical lattice. We are able to determine the occupation of individual lattice sites with a fidelity >95%, enabling direct, local measurement of particle correlations in Fermi lattice systems. This ability will be instrumental for creating and investigating low-temperature phases of the Fermi-Hubbard model, including antiferromagnets and d-wave superfluidity.

arXiv:1504.04397Physical Review LettersMay 28, 2015338 citations

Quantum distillation: dynamical generation of low-entropy states of strongly correlated fermions in an optical lattice

Salvatore R. Manmana, Fabian Heidrich‐Meisner, Marcos Rigol +3 more

Bulletin of the American Physical SocietyMar 18, 20100 citations

Low-Entropy States of Neutral Atoms in Polarization-Synthesized Optical Lattices

Carsten Robens, Jonathan Zopes, Wolfgang Alt +3 more

We create low-entropy states of neutral atoms by utilizing a conceptually new optical-lattice technique that relies on a high-precision, high-bandwidth synthesis of light polarization. Polarization-synthesized optical lattices provide two fully controllable optical lattice potentials, each of them confining only atoms in either one of the two long-lived hyperfine states. By employing one lattice as the storage register and the other one as the shift register, we provide a proof of concept using four atoms that selected regions of the periodic potential can be filled with one particle per site. We expect that our results can be scaled up to thousands of atoms by employing an atom-sorting algorithm with logarithmic complexity, which is enabled by polarization-synthesized optical lattices. Vibrational entropy is subsequently removed by sideband cooling methods. Our results pave the way for a bottom-up approach to creating ultralow-entropy states of a many-body system.We create low-entropy states of neutral atoms by utilizing a conceptually new optical-lattice technique that relies on a high-precision, high-bandwidth synthesis of light polarization. Polarization-synthesized optical lattices provide two fully controllable optical lattice potentials, each of them confining only atoms in either one of the two long-lived hyperfine states. By employing one lattice as the storage register and the other one as the shift register, we provide a proof of concept using four atoms that selected regions of the periodic potential can be filled with one particle per site. We expect that our results can be scaled up to thousands of atoms by employing an atom-sorting algorithm with logarithmic complexity, which is enabled by polarization-synthesized optical lattices. Vibrational entropy is subsequently removed by sideband cooling methods. Our results pave the way for a bottom-up approach to creating ultralow-entropy states of a many-body system.

arXiv:1608.02410Physical Review LettersFeb 8, 201740 citations

New cooling schemes for creating ultra-low entropy states of fermions in optical lattices

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