Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
QI: Fachverband Quanteninformation
QI 13: Quantum Networks, Repeaters, and QKD II (joint session Q/QI)
QI 13.8: Vortrag
Dienstag, 11. März 2025, 12:45–13:00, AP-HS
Tomography of a Rb-87 Quantum Memory — •Yiru Zhou1,2, Florian Fertig1,2, Pooja Malik1,2, and Harald Weinfurter1,2,3 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, Munich, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Munich, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany
Neutral atoms with long coherence times are a promising platform for future quantum networks. While recent advances have significantly improved the coherence time of neutral atom quantum memories [1], a deeper understanding of the dynamics of the entangled states remains crucial for further optimization.
In this talk, we present an Rb-87 neutral atom quantum memory that uses magnetically less sensitive atomic qubits, {|F=1,mF=−1>,|F=2,mF=+1>} or {|F=1,mF=+1>,|F=2,mF=−1>}, as the basis for quantum memory. To investigate the dynamics of quantum states stored in this memory in detail, we perform a series of overcomplete Pauli tomography measurements and reconstruct the density matrices of entangled state. These measurements enable us to analyze the impact of various experimental improvements on the fidelity of the entangled state, providing detailed insights into the evolution of the coherence and dephasing processes.
[1] Y. Zhou et al., PRX Quantum 5, 020307 (2024)
Keywords: Quantum network; Neutral atoms; Atom-photon entanglement; Quantum memory; Quantum state tomography