Speaker
Description
The efficient preparation of scalable multipartite entanglement is crucial for advancing next-generation quantum devices. We explore twist-and-turn (TaT) dynamics in XY models with ferromagnetic, dipolar interactions and a Rabi field. Our study reveals their capacity to achieve scalable spin squeezing at short times and quantum Fisher information with Heisenberg scaling at later times, suggesting generation of scalable multipartite entangled states and potential quantum metrological advantages. We show that TaT dynamics in two-dimensional dipolar systems reproduce results of infinite-range interactions within certain parameter regimes. In particular, scalable entanglement through spin squeezing develops in a time that grows only logarithmically with system size, saturating the maximum speed of entanglement buildup allowed by generalized Lieb-Robinson bounds for power-law interactions. Additionally, our study highlights nontrivial nonthermalizing dynamics at intermediate energy scales. This work holds experimental relevance for systems with power-law interactions, such as Rydberg atoms and trapped ions, which can potentially implement the TaT protocol. Furthermore, it provides foundational insights into the intersection of quantum many-body dynamics and quantum metrology. Reference: arXiv:2507.08206.
| Keyword-1 | Spin squeezing |
|---|---|
| Keyword-2 | Quantum metrology |
| Keyword-3 | Quantum entanglement |