We prepare high-filling two-component arrays of tens of fermionic ^{6}Li atoms in optical tweezers, with the atoms in the ground motional state of each tweezer. Using a stroboscopic technique, we configure the arrays in various two-dimensional geometries with negligible Floquet heating. A full spin- and density-resolved readout of individual sites allows us to postselect near-zero entropy initial states for fermionic quantum simulation. We prepare a correlated state in a two-by-two tunnel-coupled Hubbard plaquette, demonstrating all the building blocks for realizing a programmable fermionic quantum simulator.
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http://dx.doi.org/10.1103/PhysRevLett.129.123201 | DOI Listing |
Phys Rev Lett
December 2024
Institute for Advanced Study, Tsinghua University, Beijing 100084, China.
The nonintegrable higher spin Kitaev honeycomb model has an exact Z_{2} gauge structure, which exclusively identifies quantum spin liquid in the half-integer spin Kitaev model. But its constraints for the integer-spin Kitaev model are much limited, and even trivially gapped insulators cannot be excluded. The physical implications of exact Z_{2} gauge structure, especially Z_{2} fluxes, in integer-spin models remain largely unexplored.
View Article and Find Full Text PDFPhys Rev Lett
December 2024
International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560089, India.
We consider an analytically tractable model that exhibits the main features of the Page curve characterizing the evolution of entanglement entropy during evaporation of a black hole. Our model is a gas of noninteracting fermions on a lattice that is released from a box into the vacuum. More precisely, our Hamiltonian is a tight-binding model with a defect at the junction between the filled box and the vacuum.
View Article and Find Full Text PDFJ Chem Theory Comput
December 2024
Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany.
Density functional theory has become the workhorse of quantum physics, chemistry, and materials science. Within these fields, a broad range of applications needs to be covered. These applications range from solids to molecular systems, from organic to inorganic chemistry, or even from electrons to other Fermions, such as protons or muons.
View Article and Find Full Text PDFJ Chem Phys
December 2024
Department of Chemistry, Rice University, Houston, Texas 77005, USA.
The Jordan-Wigner transformation permits one to convert spin 1/2 operators into spinless fermion ones, or vice versa. In some cases, it transforms an interacting spin Hamiltonian into a noninteracting fermionic one, which is exactly solved at the mean-field level. Even when the resulting fermionic Hamiltonian is interacting, its mean-field solution can provide surprisingly accurate energies and correlation functions.
View Article and Find Full Text PDFPhys Rev Lett
November 2024
Institute for Quantum Electronics and Quantum Center, ETH Zürich, 8093 Zürich, Switzerland.
The formation of dark states is an important concept in quantum sciences, but its compatibility with strong interparticle interactions-for example, in a quantum degenerate gas-is hardly explored. Here, we realize a dark state in one of the spins of a two-component, resonantly interacting Fermi gas using a Λ system within the D_{2} transitions of ^{6}Li at high magnetic field. The dark state is created in a micrometer-sized region within a one-dimensional channel connecting two superfluid reservoirs.
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