High-Contrast Interference of Ultracold Fermions

Abstract

Many-body interference between indistinguishable particles can give rise to strong correlations rooted in quantum statistics. We study such Hanbury Brown-Twiss-type correlations for number states of ultracold massive fermions. Using deterministically prepared ${}^6$Li atoms in optical tweezers, we measure momentum correlations using a single-atom sensitive time-of-flight imaging scheme. The experiment combines on-demand state preparation of highly indistinguishable particles with high-fidelity detection, giving access to two- and three-body correlations in fields of fixed fermionic particle number. We find that pairs of atoms interfere with a contrast close to 80%. We show that second-order density correlations arise from contributions from all two-particle pairs and detect intrinsic third-order correlations.

References in corpus (24)

• Probing many-body states of ultra-cold atoms via noise correlations
• Spatial quantum noise interferometry in expanding ultracold atom clouds
• Deterministic Preparation of a Tunable Few-Fermion System
• The Mott insulator transition in two dimensions
• Camparison of the Hanbury Brown-Twiss effect for bosons and fermions
• Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
• Two-particle Aharonov-Bohm effect and Entanglement in the electronic Hanbury Brown Twiss setup
• On solving quantum many-body problems by experiment
• Free fermion antibunching in a degenerate atomic Fermi gas released from an optical lattice
• Two Fermions in a double well: Exploring a fundamental building block of the Hubbard model
• Ghost Imaging with Atoms
• Distinguishability and many-particle interference
• Spin-resolved single-atom imaging of ${}^6$Li in free space
• Bose-Einstein and Fermi-Dirac Interferometry in Particle Physics
• Interference of Identical Particles from Entanglement to Boson-Sampling
• Observation of genuine three-photon interference
• Ideal n-body correlations with massive particles
• Matter wave Fourier optics with a strongly interacting two-dimensional Fermi gas
• Hanbury Brown and Twiss interferometry at a free-electron laser
• Direct experimental evidence of free fermion antibunching
• Solving the quantum many-body problem via correlations measured with a momentum microscope
• Two-particle interference of electron pairs on a molecular level
• Characterizing twin-particle entanglement in double-well potentials
• Signatures of indistinguishability in bosonic many-body dynamics

Cited by in corpus (27)

• Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
• Observation of Cooper Pairs in a Mesoscopic 2D Fermi Gas
• Measurement of Identical Particle Entanglement and the Influence of Antisymmetrisation
• Observation of the Hanbury Brown and Twiss Effect with Ultracold Molecules
• Experimental extraction of the quantum effective action for a non-equilibrium many-body system
• Hanbury-Brown and Twiss bunching of phonons and of the quantum depletion in a strongly-interacting Bose gas
• Momentum-space atom correlations in a Mott insulator
• Quantum Gas Microscopy of Fermions in the Continuum
• Wave-particle duality of many-body quantum states
• Many-particle interference to test Born's rule
• Fermionic correlation functions from randomized measurements in programmable atomic quantum devices
• Signatures of Many-Particle Interference
• Detecting high-dimensional entanglement in cold-atom quantum simulators
• Characterizing four-body indistinguishability via symmetries
• Momentum space entanglement of interacting fermions
• Finite Temperature Off-Diagonal Long-Range Order for Interacting Bosons
• Anyon optics with time-of-flight two-particle interference of double-well-trapped interacting ultracold atoms
• Exact closed-form analytic wave functions in two dimensions: Contact-interacting fermionic spinful ultracold atoms in a rapidly rotating trap
• Fractional quantum Hall physics and higher-order momentum correlations in a few spinful fermionic contact-interacting ultracold atoms in rotating traps
• $n$-body anti-bunching in a degenerate Fermi gas of ${}^3$He* atoms
• Third-order momentum correlation interferometry maps for entangled quantal states of three singly trapped massive ultracold fermions
• All-order momentum correlations of three ultracold bosonic atoms confined in triple-well traps: Signatures of emergent many-body quantum phase transitions and analogies with three-photon quantum-optics interference
• Tunnel-coupled optical microtraps for ultracold atoms
• Building Entanglement Entropy out of Correlation Functions for Interacting Fermions
• $n$-body Correlation of Tonks-Girardeau Gas
• Two-Body Kapitza-Dirac Scattering of One-Dimensional Ultracold Atoms
• Driven-dissipative Quantum Dynamics in Cavity Magnon-Polariton System