Event Date Details:
Zoom and In-Person
- Elings 1605 and Zoom
- Physics Department Colloquium
Please note this a MONDAY event.
In pursuit of entanglement: XXZ interactions for spin-squeezing in atomic and solid-state spin ensembles
Emily Davis, University of California, Berkeley
In this talk, I will discuss two complementary approaches for generating squeezed states using XXZ interactions. The first approach centers around a cavity QED platform designed to realize programmable, nonlocal spin-spin couplings. Specifically, we implement an all-to-all XXZ Hamiltonian with tunable anisotropy, strength, and sign. Images of the resulting magnetization dynamics show that XXZ interactions protect spin coherence against spatial inhomogeneities, which may enhance the robustness of future spin-squeezing protocols.
The robustness of the XXZ model against disorder opens the door to squeezing via long-range dipolar interactions within an ensemble of spin defects in diamond, for which we identify and achieve the key required ingredients: (i) a theory that elucidates if and how power-law XXZ interactions generate squeezing; (ii) a two-dimensional ensemble of strongly-interacting, optically-polarizable spins; (iii) methods for detecting squeezing despite significant technical noise.
2:00 PM PST