Reconfigurable arrays of neutral atoms have emerged as a leading platform for quantum science. Their excellent coherence properties combined with programmable Rydberg interactions have led to intriguing observations such as quantum phase transitions, the discovery of quantum many-body scars, and novel quantum computing architectures.
Here, I will look forward to what is next for atom arrays. In particular, I am going to introduce a dual-species Rydberg array, that naturally lends itself for measurement-based protocols such as quantum error correction, long-range entangled state preparation, and measurement-altered many-body dynamics. The second atomic species is used as an auxiliary qubit to measure and control the primary species. In a first demonstration of this architecture, we use an array of cesium qubits to correct correlated phase errors on an array of rubidium data qubits [1]. Rydberg interactions between the two species then lead to novel regimes, including greatly enhanced resonant dipole interactions, that we use to demonstrate a two-qubit gate and quantum non-demolition readout [2].
Another crucially important step for atom arrays will be the scaling beyond a single processing module. I will describe how a modular quantum network architecture can look like and will present a node that combines large atom arrays with arrays of photonic interfaces at telecom wavelength [3].
[1] Singh, Bradley, Anand, Ramesh, White, Bernien, Science (2023)
[2] Anand, Bradley, White, Ramesh, Singh, Bernien, Nature Physics (2024)
[3] Menon, Glachman, Pompili, Dibos, Bernien, Nature Comm. (2024)
17:00 Uhr Get-together with snacks
17:30 Uhr VCQ Student talk
17:45 Uhr VCQ Colloquium talk
For further information please visit https://vcq-quantum.at/colloquium-ss-2025/
