Measuring spin correlations in optical lattices using superlattice potentials

Abstract

We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the new vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic (AF) correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground state candidate for the doped repulsive Hubbard model.

5 pages, 3 figures

References in corpus (16)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Probing the Superfluid to Mott Insulator Transition at the Single Atom Level
• Single-Spin Addressing in an Atomic Mott Insulator
• Spatial quantum noise interferometry in expanding ultracold atom clouds
• Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
• Verification of universal relations in a strongly interacting Fermi gas
• Quantum Non-Demolition Detection of Strongly Correlated Systems
• Controlling and Detecting Spin Correlations of Ultracold Atoms in Optical lattices
• Probing nearest-neighbor correlations of ultracold fermions in an optical lattice
• Magnetic dipolar interaction in an atomic Bose Einstein condensate interferometer
• Néel transition of lattice fermions in a harmonic trap: a real-space DMFT study
• Probing spatial spin correlations of ultracold gases by quantum noise spectroscopy
• Magnetic and superfluid phases of confined fermions in two-dimensional optical lattices
• Antiferromagnetic noise correlations in optical lattices

Cited by in corpus (4)

• Universal probes for antiferromagnetic correlations and entropy in cold fermions on optical lattices
• Spin correlations and doublon production rate for fermionic atoms in modulated optical lattices
• Inducing spin-dependent tunneling to probe magnetic correlations in optical lattices
• Using superlattice potentials to probe long-range magnetic correlations in optical lattices