Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Information (Quantum Communication) I
Q 34.3: Vortrag
Mittwoch, 13. März 2019, 14:30–14:45, S HS 002 Chemie
Cavity based production of entangled atom-light Schrödinger-cat states — •Severin Daiss1, Bastian Hacker1, Stephan Welte1, Lukas Hartung1, Armin Shaukat1, Stephan Ritter1,2, Lin Li1,3, and Gerhard Rempe1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching — 2Present address: TOPTICA Photonics AG, Lochhamer Schlag 19, 82166 Gräfelfing — 3Present address: Huazhong University of Science and Technology, Wuhan 430074, China
Quantum mechanics allows for the entanglement of microscopic and macroscopic states, as illustrated by Schrödinger’s famous gedanken experiment 1. An experimentally accessible model system uses the superposition of optical coherent states with different phases as a macroscopic system. It is decribed by continuous variables and its size can be tuned with the average number of photons. To produce a Schrödinger cat state, we reflect a coherent pulse from an atom-cavity system, entangling the atomic spin with the phase of the incoming pulse 2. Manipulating and measuring the atom allows to produce a plethora of different optical cat states with possible applications in continuous-variable quantum communication.
1 E. Schrödinger, Naturwissenschaften 23, 807 (1935)
2 B. Wang and L.-M. Duan, Phys. Rev. A 72, 022320 (2005)