Ultrastrong magnon–magnon coupling dominated by antiresonant interactions

Takuma Makihara, Kenji Hayashida, G. Timothy Noe, 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 () and Junichiro Kono ()
Additional contact information
Takuma Makihara: Rice University
Kenji Hayashida: Rice University
G. Timothy Noe: Rice University
Xinwei Li: Rice University
Nicolas Marquez Peraca: Rice University
Xiaoxuan Ma: International Center of Quantum and Molecular Structures and Materials Genome Institute, Shanghai University
Zuanming Jin: University of Shanghai for Science and Technology
Wei Ren: International Center of Quantum and Molecular Structures and Materials Genome Institute, Shanghai University
Guohong Ma: International Center of Quantum and Molecular Structures and Materials Genome Institute, Shanghai University
Ikufumi Katayama: Yokohama National University
Jun Takeda: Yokohama National University
Hiroyuki Nojiri: Tohoku University
Dmitry Turchinovich: Universität Bielefeld
Shixun Cao: International Center of Quantum and Molecular Structures and Materials Genome Institute, Shanghai University
Motoaki Bamba: Kyoto University
Junichiro Kono: Rice University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Exotic quantum vacuum phenomena are predicted in cavity quantum electrodynamics systems with ultrastrong light-matter interactions. Their ground states are predicted to be vacuum squeezed states with suppressed quantum fluctuations owing to antiresonant terms in the Hamiltonian. However, such predictions have not been realized because antiresonant interactions are typically negligible compared to resonant interactions in light-matter systems. Here we report an unusual, ultrastrongly coupled matter-matter system of magnons that is analytically described by a unique Hamiltonian in which the relative importance of resonant and antiresonant interactions can be easily tuned and the latter can be made vastly dominant. We found a 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 exploring exotic quantum vacuum phenomena predicted in ultrastrongly coupled light-matter systems.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.nature.com/articles/s41467-021-23159-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23159-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-021-23159-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().