Overview articles, Magazine articles, and PhD thesis

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Overview articles for non-researchers

`Exceptional' research points way toward quantum discoveries

`Exceptional' research points way toward quantum discoveries

News Release by Rice University

"Continuous transition between weak and ultra-strong coupling through exceptional points in carbon nanotube micro-cavity exciton polaritons",
Weilu Gao, Xinwei Li, Motoaki Bamba, and Junichiro Kono,
Nature Photonics, published online (2018).

Quantum shift shows itself in coupled light and matter

Quantum shift shows itself in coupled light and matter

News Release by Rice University

"Vacuum Bloch-Siegert shift in Landau polaritons with ultra-high cooperativity",
Xinwei Li, Motoaki Bamba, Qi Zhang, Saeed Fallahi, Geoff C. Gardner, Weilu Gao, Minhan Lou, Katsumasa Yoshioka, Michael J. Manfra, and Junichiro Kono,
Nature Photonics, published online (2018).

Exploring physical systems showing super-radiant phase transitions

Exploring physical systems showing super-radiant phase transitions (written in Japanese)

Magazine articles

Photon is no longer a quantum

Photon is no longer a quantum (written in Japanese)

Motoaki BAMBA, Parity: physical science magazine, Vo. 32, No. 11, pp. 35-40 (November 2017, Maruzen Publishing)

光と物質の超強結合は電磁場と電荷を相転移させるか?

Phase transition of electromagnetic fields and matters by ultra-strong interaction (written in Japanese)

Thanks to an ultra-strong light-matter interaction, a transverse electromagnetic field gets a static coherent amplitude spontaneously in thermal equilibrium. While this phase transition has not been observed in atomic systems, it was recently found that a similar phase transition exists in a superconducting circuit.

Motoaki BAMBA, Solid State Physics, Vo. 52, No. 9, pp. 459-476 (September 2017, AGNE Gijutsu Center)

PhD thesis

Quantum Electrodynamics of Excitons with Radiative Relaxation
Motoaki BAMBA, March 2009, Osaka University
Errata