Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 56: Quantum Optics and Control I
Q 56.6: Talk
Thursday, March 5, 2026, 16:00–16:15, P 3
Entanglement shortcuts in the geometry of micromaser state preparation — •Matthias Bundy1, Christoph Dittel1,2, and Andreas Buchleitner1,2 — 1Physikalisches Institut, Albert-Ludwigs-Universität, Hermann-Herder-Straße 3, 79104 Freiburg, Germany — 2EUCOR Centre for Quantum Science and Quantum Computing, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
Any desired state of a single, quantized cavity mode can be prepared by sequentially interacting with a string of two-level atoms. However, the fidelity of the preparation process much depends on the desired target state, the number of atoms, and the degree of their mutual entanglement. Here we investigate the state preparation process from a geometric perspective, by establishing an appropriate metric for the length of state preparation trajectories. We quantify how the entanglement of the atomic string shortens the path from the cavity mode's initial to target state, and discuss how these trajectories differ for classical and non-classical target states.
Keywords: Jaynes-Cummings model; micromaser; quantum state preparation; control problem; asymptotic completeness