QEC | UMQT

Cs Atom Array @ 7K

Wed, 19 Nov 2025 00:00:00 +0000

We have demonstrated single atom trapping of Cs in a 940nm tweezer array within the 7K region of our cryostat. Next steps will see installation of 810nm trap beams for Rb and evaluation of cryogenic lifetimes.

Rb/Cs Dual Species MOTs @ 7K

Sun, 13 Apr 2025 00:00:00 +0000

We have demonstrated a bi-chromatic dual species magneto-optical trap enabling simultaneous cooling of Rb and Cs within the 7K region of our cryostat. Following this project milestone our aim now is to get the atoms loaded into arrays of species-selective optical traps ready to begin work on inter-species gate operations.

First cryogenic Cs MOT!

Fri, 10 Jan 2025 00:00:00 +0000

We have trapped our first cold Cs MOT inside the 7K region of the cryostat, running the MOT with superconducting coils. This is the first step towards generating large, reconfigurable arrays of individually trapped atoms, and will soon be followed by the first cold Rb atoms as the new cooling laser system is assembled.

Interspecies Förster resonances for Rb-Cs Rydberg d -states for enhanced multi-qubit gate fidelities

Fri, 01 Mar 2024 00:00:00 +0000

Interspecies Förster resonances of Rb-Cs Rydberg d-states for enhanced multi-qubit gate fidelities

Wed, 03 Jan 2024 00:00:00 +0000

We present an analysis of interspecies interactions between Rydberg d-states of rubidium and cesium. We identify the Förster resonance channels offering the strongest interspecies couplings, demonstrating the viability for performing high-fidelity two- and multi-qubit C_kZ gates up to k=4, including accounting for blockade errors evaluated via numerical diagonalization of the pair-potentials. Our results show d-state orbitals offer enhanced suppression of intraspecies couplings compared to s-states, making them well suited for use in large-scale neutral atom quantum processors. For more details see arXiv:2401.02308.