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28 March 2024
 
  » arxiv » 2008.10721

 Article overview


Magnonic Quantum Simulator of Antiresonant Ultrastrong Light-Matter Coupling
Takuma Makihara ; Kenji Hayashida ; G. Timothy Noe II ; Xinwei Li ; Nicolas Marquez Peraca ; Xiaoxuan Ma ; Zuanming Jin ; Wei Ren ; Guohong Ma ; Ikufumi Katayama ; Jun Takeda ; Hiroyuki Nojiri ; Dmitry Turchinovich ; Shixun Cao ; Motoaki Bamba ; Junichiro Kono ;
Date 24 Aug 2020
AbstractExotic quantum vacuum phenomena are predicted in cavity quantum electrodynamics (QED) systems with ultrastrong light-matter interactions. Their ground states are predicted to be vacuum squeezed states with suppressed quantum fluctuations. The source of such phenomena are antiresonant terms in the Hamiltonian, yet antiresonant interactions are typically negligible compared to resonant interactions in light-matter systems. We report an unusual coupled matter-matter system of magnons that can simulate a unique cavity QED Hamiltonian with coupling strengths that are easily tunable into the ultrastrong coupling regime and with dominant antiresonant terms. We found a novel regime where vacuum Bloch-Siegert shifts, the hallmark of antiresonant interactions, greatly exceed analogous frequency shifts from resonant interactions. Further, we theoretically explored the system’s ground state and calculated up to 5.9 dB of quantum fluctuation suppression. These observations demonstrate that magnonic systems provide an ideal platform for simulating exotic quantum vacuum phenomena predicted in ultrastrongly coupled light-matter systems.
Source arXiv, 2008.10721
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