Details
Speaker Name/Affiliation
Johannes Zeiher / Max-Planck Institute of Quantum Optics
When
-
Seminar Type
Location (Room)
JILA X317
Event Details & Abstracts
Abstract: Atom arrays have shaped the research frontier in quantum simulation, quantum metrology and quantum computation in recent years. In most experiments, trap configurations are formed via holographic methods or acousto-optic deflectors, which offer exceptional versatility and dynamic control.
In this talk, I will introduce a complementary approach to realizing microscopically controlled atom arrays by combining static large-scale optical lattices with optical tweezer arrays. Utilizing a specialized, highly anisotropic lattice geometry, we directly load thousands of individually addressable strontium atoms from the magneto-optical trap. These atoms are subsequently imaged with high fidelity and minimal loss using repulsive Sisyphus-cooling. Exploiting a bichromatic combination of lattice array and optical tweezer array, we demonstrate the iterative assembly and continuous operation of atom arrays with more than a thousand sorted atoms. To prepare our system for applications in quantum computing and quantum simulation, we furthermore realize a qubit in the meta-stable fine-structure states of strontium. We demonstrate long coherence times and high-fidelity manipulation of this qubit, as well as fast initialization via coherent three-photon coupling from the ground state. Our work paves the way to scale tweezer-based quantum simulators to larger system sizes and opens an alternative preparation route for Hubbard systems in optical lattices without the need for evaporation.
In this talk, I will introduce a complementary approach to realizing microscopically controlled atom arrays by combining static large-scale optical lattices with optical tweezer arrays. Utilizing a specialized, highly anisotropic lattice geometry, we directly load thousands of individually addressable strontium atoms from the magneto-optical trap. These atoms are subsequently imaged with high fidelity and minimal loss using repulsive Sisyphus-cooling. Exploiting a bichromatic combination of lattice array and optical tweezer array, we demonstrate the iterative assembly and continuous operation of atom arrays with more than a thousand sorted atoms. To prepare our system for applications in quantum computing and quantum simulation, we furthermore realize a qubit in the meta-stable fine-structure states of strontium. We demonstrate long coherence times and high-fidelity manipulation of this qubit, as well as fast initialization via coherent three-photon coupling from the ground state. Our work paves the way to scale tweezer-based quantum simulators to larger system sizes and opens an alternative preparation route for Hubbard systems in optical lattices without the need for evaporation.
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