Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
Job Title |
Associate Professor |
Research Fields, Keywords |
Quantum squeezing, Microcavities, Excitons, Quantum electrodynamics, Polaritons, Quantum optics, Superradiance, Condensed matter photophysics, Semiconductors, Phase transitions, Superconducting circuits, Quantum computing, Laser, Superradiant phase transition, Thermodynamics of electromagnetic fields, Electromagnetism, Nonlinear optics |
BAMBA Motoaki
|
The Best Research Achievement in Research Career 【 display / non-display 】
-
【Published Thesis】 Observation of Dicke cooperativity in magnetic interactions(Science) 2018.08
【Published Thesis】 Magnonic superradiant phase transition(Communications Physics) 2022.01
【Published Thesis】 Superradiant Phase Transition in a Superconducting Circuit in Thermal Equilibrium(Physical Review Letters) 2016.10
Education 【 display / non-display 】
-
2004.4-2009.3
Osaka University Department of Materials Engineering Science Doctor Course Completed
-
2000.4-2004.3
Osaka University Department of Electronics and Materials Physics Graduated
Campus Career 【 display / non-display 】
-
2023.4
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
-
2023.4
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
-
2023.4
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
External Career 【 display / non-display 】
-
2021.1
Kyoto University Kyoto University Hakubi Researcher
-
2021.1-2023.3
Kyoto University Graduate School of Science Collaborative Associate Professor
-
2021.1-2023.3
Kyoto University The Hakubi Center for Advanced Research Program-Specific Associate Professor
-
2019.12-2023.3
Kyoto University International Research Unit of Quantum Information Member
-
2019.4-2020.12
Kyoto University Graduate School of Science Program-Specific Junior Associate Professor (JST PRESTO)
Academic Society Affiliations 【 display / non-display 】
Research Areas 【 display / non-display 】
-
Natural Science / Semiconductors, optical properties of condensed matter and atomic physics
-
Nanotechnology/Materials / Optical engineering and photon science
Books 【 display / non-display 】
-
Semiconductor quantum science and technology
Nicolas Marquez Peraca, Andrey Baydin, Weilu Gao, Motoaki Bamba, Junichiro Kono( Role: Joint author , 分担執筆, 範囲:Ultrastrong light–matter coupling in semiconductors)
Elsevier ( ISBN:9780128237731 ) [Reviewed]
Total pages:472 Responsible for pages:89-151 Language:English Book type:Scholarly book
-
Ultrastrong light–matter coupling in semiconductors
Nicolas Marquez Peraca and Andrey Baydin and Weilu Gao and Motoaki Bamba and Junichiro Kono( Role: Joint author)
Elsevier ( ISBN:9780128237731 )
Language:English Book type:Scholarly book
-
物性物理100問集
問集出版プロジェクト 編, 木村剛, 小林研介, 田島節子( Role: Joint author , 担当:共編者(共編著者))
大阪大学出版会 ( ISBN:9784872595710 )
Total pages:158 Language:Japanese Book type:Textbook, survey, introduction
Thesis for a degree 【 display / non-display 】
-
Quantum Electrodynamics of Excitons with Radiative Relaxation
Motoaki Bamba
Osaka University 2009.3
Doctoral Thesis Single Work [Reviewed]
Papers 【 display / non-display 】
-
Perfect intrinsic squeezing at the superradiant phase transition critical point
Kenji Hayashida and Takuma Makihara and Nicolas Marquez Peraca and Diego Fallas Padilla and Han Pu … Show more authors
Kenji Hayashida and Takuma Makihara and Nicolas Marquez Peraca and Diego Fallas Padilla and Han Pu and Junichiro Kono and Motoaki Bamba Hide authors
Scientific Reports 13 ( 1 ) 2023.2 [Reviewed]
Authorship:Last author, Corresponding author Language:English Publishing type:Research paper (scientific journal) Publisher:Springer Science and Business Media {LLC} Single Work
<jats:title>Abstract</jats:title><jats:p>Some of the most exotic properties of the quantum vacuum are predicted in ultrastrongly coupled photon–atom systems; one such property is quantum squeezing leading to suppressed quantum fluctuations of photons and atoms. This squeezing is unique because (1) it is realized in the ground state of the system and does not require external driving, and (2) the squeezing can be perfect in the sense that quantum fluctuations of certain observables are completely suppressed. Specifically, we investigate the ground state of the Dicke model, which describes atoms collectively coupled to a single photonic mode, and we found that the photon–atom fluctuation vanishes at the onset of the superradiant phase transition in the thermodynamic limit of an infinite number of atoms. Moreover, when a finite number of atoms is considered, the variance of the fluctuation around the critical point asymptotically converges to zero, as the number of atoms is increased. In contrast to the squeezed states of flying photons obtained using standard generation protocols with external driving, the squeezing obtained in the ground state of the ultrastrongly coupled photon–atom systems is resilient against unpredictable noise.</jats:p>
-
Magnonic superradiant phase transition
Bamba Motoaki, Li Xinwei, Peraca Nicolas Marquez, Kono Junichiro
Communications Physics 5 ( 1 ) 2022.1 [Reviewed]
Authorship:Lead author, Corresponding author Language:English Publishing type:Research paper (scientific journal) Joint Work
-
Ultrastrong magnon-magnon coupling dominated by antiresonant interactions
Makihara Takuma, Hayashida Kenji, Noe G. Timothy II, Li Xinwei, Peraca Nicolas Marquez, Ma Xiaoxuan … Show more authors
Makihara Takuma, Hayashida Kenji, Noe G. Timothy II, Li Xinwei, Peraca Nicolas Marquez, Ma Xiaoxuan, Jin Zuanming, Ren Wei, Ma Guohong, Katayama Ikufumi, Takeda Jun, Nojiri Hiroyuki, Turchinovich Dmitry, Cao Shixun, Bamba Motoaki, Kono Junichiro Hide authors
NATURE COMMUNICATIONS 12 ( 1 ) 2021.5 [Reviewed]
DOI Web of Science PubMed arXiv
Authorship:Corresponding author Language:English Publishing type:Research paper (scientific journal) Publisher:Springer Science and Business Media {LLC} Joint Work
<jats:title>Abstract</jats:title><jats:p>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.</jats:p>
Other Link: http://dx.doi.org/10.1038/s41467-021-23159-z
-
Kurihara Takayuki, Bamba Motoaki, Watanabe Hiroshi, Nakajima Makoto, Suemoto Tohru
Communications Physics 6 ( 1 ) 2023.3 [Reviewed]
Authorship:Lead author Language:English Publishing type:Research paper (scientific journal) Joint Work
Other Link: https://doi.org/10.1038/s42005-023-01167-3
-
Magnetically Tuned Continuous Transition from Weak to Strong Coupling in Terahertz Magnon Polaritons
Andrey Baydin, Kenji Hayashida, Takuma Makihara, Fuyang Tay, Xiaoxuan Ma, Wei Ren, Guohong Ma, G. T … Show more authors
Andrey Baydin, Kenji Hayashida, Takuma Makihara, Fuyang Tay, Xiaoxuan Ma, Wei Ren, Guohong Ma, G. Timothy Noe II, Ikufumi Katayama, Jun Takeda, Hiroyuki Nojiri, Shixun Cao, Motoaki Bamba, Junichiro Kono Hide authors
Physical Review Research 5 ( 1 ) L012039 2023.3 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Publisher:American Physical Society Joint Work
Depending on the relative rates of coupling and dissipation, a light-matter coupled system is either in the weak- or strong-coupling regime. Here, we present a unique system where the coupling rate continuously increases with an externally applied magnetic field while the dissipation rate remains constant, allowing us to monitor a weak-to-strong coupling transition as a function of magnetic field. We observed a Rabi splitting of a terahertz magnon mode in yttrium orthoferrite above a threshold magnetic field of ~14 T. Based on a microscopic theoretical model, we show that with increasing magnetic field the magnons transition into magnon polaritons through an exceptional point, which will open up new opportunities for in situ control of non-Hermitian systems.
Review Papers 【 display / non-display 】
-
Thermal Photons and Non-Equilibrium Magnons
Bamba Motoaki
Butsuri 79 ( 2 ) 63 - 67 2024.2 [Reviewed] [Invited]
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Publisher:The Physical Society of Japan Single Work
<p>Magnon-mediated Dicke cooperativity has been observed in ErFeO<sub>3</sub>. A superradiant phase transition by ultrastrong magnon–spin coupling has also been confirmed. The low-temperature phase transition in ErFeO<sub>3</sub> would be a key phenomenon bridging the thermal-equilibrium and non-equilibrium physics.</p><p>Magnon-mediated Dicke cooperativity has been observed in ErFeO<sub>3</sub>. A superradiant phase transition by ultrastrong magnon–spin coupling has also been confirmed. The low-temperature phase transition in ErFeO<sub>3</sub> would be a key phenomenon bridging the thermal-equilibrium and non-equilibrium physics.</p>
-
馬場基彰
化学 78 ( 8 ) 11 - 11 2023.8
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher:岩波書店 Joint Work
-
Our Voice and Our Ears-NPO for the Advancement of Science from Japan
BAMBA Motoaki
Butsuri 78 ( 3 ) 152 - 153 2023.3 [Reviewed] [Invited]
Authorship:Lead author, Last author, Corresponding author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Publisher:The Physical Society of Japan Single Work
Other Link: http://hdl.handle.net/2433/279807
-
Quantum Simulation of an Extended Dicke Model with a Magnetic Solid
Nicolas Marquez Peraca, Xinwei Li, Jaime M. Moya, Kenji Hayashida, Xiaoxuan Ma, Kelly J. Neubauer, … Show more authors
Nicolas Marquez Peraca, Xinwei Li, Jaime M. Moya, Kenji Hayashida, Xiaoxuan Ma, Kelly J. Neubauer, Diego Fallas Padilla, Chien-Lung Huang, Pengcheng Dai, Andriy H. Nevidomskyy, Han Pu, Emilia Morosan, Shixun Cao, Motoaki Bamba, Junichiro Kono Hide authors
arXiv 2023.2
Authorship:Corresponding author Language:English Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Publisher:arXiv Joint Work
-
春日匠, 馬場基彰
科学 92 ( 5 ) 398 - 400 2022.5
Authorship:Last author Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher:岩波書店 Joint Work
Awards 【 display / non-display 】
-
Top Peer Reviewer 2019, Top 1% of reviewers in Physics
2019.9 Web of Science
Individual or group name of awards:Motoaki BAMBA
-
Publons Peer Review Awards 2018, Top 1% of reviewers in Physics
2018.9 Web of Science
Individual or group name of awards:Motoaki BAMBA
-
Research Award
2018.2 Research Foundation for Opto-Science and Technology
Individual or group name of awards:BAMBA Motoaki
-
11th Young Scientist Award of the Physical Society of Japan (Division 5: Optical Properties of Condensed Matter)
2017.3 The Physical Society of Japan Superposition of light in free space and localized matters
Individual or group name of awards:BAMBA Motoaki
-
11th Young Scientist Award of the Physical Society of Japan (Division 1: Atomic and Molecular physics, Quantum Electronics, Radiation)
2017.3 The Physical Society of Japan Theoretical studies on the ultrastrong light matter coupling
Individual or group name of awards:BAMBA Motoaki
Grant-in-Aid for Scientific Research 【 display / non-display 】
-
Macroscopic quantum theory for quantum condensations in non-equilibrium composite systems
Grant number:26287087 2014.4 - 2018.3
JSPS Grant-in-Aid for Scientific Research(B)
Investigator(s):OGAWA Tetsuo
Authorship:Coinvestigator(s) Grant type:Competitive
-
Ultrastrong coupling of light and matter: Lasing of nonclassical states
Grant number:12J00632 2012.4 - 2015.3
JSPS Grant-in-Aid for JSPS Fellows
Investigator(s):BAMBA Motoaki
Authorship:Principal investigator Grant type:Competitive
-
Grant number:07J00997 2007.4 - 2009.3
JSPS Grant-in-Aid for JSPS Fellows
Investigator(s):BAMBA Motoaki
Authorship:Principal investigator Grant type:Competitive
Other external funds procured 【 display / non-display 】
-
2017.10 - 2021.3
Japan Science and Technology Agency Precursory Research for Embryonic Science and Technology (PRESTO)
Investigator(s):BAMBA Motoaki
Authorship:Principal investigator
In order to push the frontier of quantum technologies into the real societies, we try to establish a strategy for overcoming the trade-off between controlling and protecting quantum states. In contrast to the conventional way relying on the suppression of decoherence sources in fabrication processes, we artificially cause a phase transition of environment incorporating the decoherence sources, which are expected to be pinned by a spontaneously appeared field and an engineered energy gap in the environment, while keeping quantum-bits unchanged.
Presentations 【 display / non-display 】
-
Ultrastrong Light-Matter Coupling to Control Quantum States in Thermal Equilibrium
Motoaki BAMBA [Invited]
The 70th JSAP Spring Meeting 2023 2023.3 The Japan Society of Applied Physics
Event date: 2023.3
Language:Japanese Presentation type:Oral presentation (invited, special)
Venue:Sophia University Country:Japan
-
Ultrastrong coupling between terahertz wave and a variety of materials
Motoaki BAMBA [Invited]
The 50th workshop of the 182nd Committee on Terahertz Science, Technology and Industrial Development, Japan Society for the Promotion of Science 2022.7 The 182nd Committee on Terahertz Science, Technology and Industrial Development, Japan Society for the Promotion of Science
Event date: 2022.7
Language:Japanese Presentation type:Oral presentation (invited, special)
Venue:Kobe University Country:Japan
-
馬場 基彰
日本科学振興協会 第1回総会・キックオフミーティング 2022.6 日本科学振興協会
Event date: 2022.6
Language:Japanese Presentation type:Poster presentation
Venue:東京国際交流館 プラザ平成 Country:Japan
Other Link: https://www2.aeplan.co.jp/jaas2022/
-
Ultrastrong light-matter coupling and superradiant phase transition
Motoaki BAMBA [Invited]
The 22th Symposium on Plasmonic Chemistry 2022.6 Association for Plasmonic Chemistry
Event date: 2022.6
Language:Japanese Presentation type:Oral presentation (invited, special)
Venue:Osaka University Country:Japan
-
馬場 基彰
京都大学創立125周年記念 「"鏡"プロジェクト」 2022.6 京都大学 白眉センター
Event date: 2022.6
Language:Japanese Presentation type:Public lecture, seminar, tutorial, course, or other speech
Venue:京都大学総合博物館 Country:Japan
Other Link: https://www.kagami-hakubi.com/
Charge of on-campus class subject 【 display / non-display 】
-
2023 Advanced Theory of Light-Matter Interaction
Graduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Specialization in Physics
Claude Cohen-Tannoudji, Jacques Dupont-Roc, and Gilbert Grynberg, Photons and Atoms: Introduction to Quantum Electrodynamics(Wiley, 1997)
-
2023 Introduction to Light-Matter Interaction
Graduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Specialization in Physics
D.F. Walls and Gerard J. Milburn, Quantum Optics(Springer, Berlin, Heidelberg, 2008)
-
2023 Solid State Physics
College of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Physics and Applied Physics Program
Charge of off-campus class subject 【 display / non-display 】
-
物性物理学入門
2015.4 - 2019.9 Institution:大阪大学
Committee Memberships 【 display / non-display 】
-
National Institute of Science and Technology Policy (NISTEP)
2023.4 Science and Technology Expert
Committee type:Government
-
Japanese Association for the Advancement of Science (JAAS)
2021.11 Board member
Committee type:Academic society
-
Japanese Association for the Advancement of Science (JAAS)
2021.11 - 2022.7 President
Committee type:Academic society
-
The Preparation Committee of Japanese Association for Advancement of Science
2020.11 - 2022.6 Chairperson
Committee type:Academic society
-
The Physical Society of Japan
2017.4 - 2018.3 Committee in Division 5
Committee type:Academic society
Social Contribution(Extension lecture) 【 display / non-display 】
-
GENSEKI 2022 The Final
Role(s): Commentator
学生団体BEAST GENSEKI 2022 日本科学未来館 2023.2
Audience: Schoolchildren, Junior high school students, High school students, University students, Graduate students, Teachers, Parents/Guardians, Researchers, General public, Company
Type:Seminar, workshop
-
【京大准教授が語る】「光相転移」の魅力とは!?気になるヨーロッパの研究環境も紹介!(馬場基彰先生)- 第2回突撃隣の研究室!
Role(s): Guest
学生コミュニティミツバチ 突撃隣の研究室! YouTube 2021.12
Audience: Schoolchildren, Junior high school students, High school students, University students, Graduate students, Teachers, Parents/Guardians
Type:Internet
-
CAREER ONLINE EVENT for Researchers and Candidates
Role(s): Guest, Panelist
BEAST オンライン 2021.11
Audience: University students, Graduate students, Teachers, Parents/Guardians, General public
Type:Seminar, workshop
-
集合知ネットワーク構築に向けて
Role(s): Guest, Panelist
科学技術振興機構(JST) サイエンスアゴラ2021 2021.11
Type:Seminar, workshop
コロナ禍で様々な科学的な情報が政治判断に活用され、国民に対する説明においてもこういった科学的な根拠が広く使われてきた。しかし、残念ながら不足している部分が多くみられたことも否定できない事実であろう。では私たちは何を考え、何を誰とどのように議論を行えばよいのでしょうか。有事の際には毎回問題になるものの、猶予期間には手が付けられない。こういった壁をどのように乗り越えればよいのでしょうか。「ヒトが紡ぐ」様々な事象をどのようにとらえ、議論し、形にしていくことができるのでしょうか。
いくつかの組織からゲストをお招きして、これらの解決策を講じ、知の在り方を探ります。 -
集合知ネットワークの構築に向けて -効果的連携のあり方を探る-
Role(s): Guest
科学技術振興機構(JST) サイエンスアゴラ2020 2020.11
Type:Seminar, workshop
ヒトが人であるがゆえに起こっている課題について解を見出すための一つの方法は「対話」ではないだろうか。 他者と経験を共にすることで自覚的価値が得られ、個人が知り得る情報範囲をつながることによって乗り越えられる。 21世紀型精神活動の現れとして本提案事業であるインクルーシブな学術的交流の機会の構築をめざし、様々な活動をされている方々にお集まりいただき、 効果的進め方を模索し、実装の足がかりとする。
Media Coverage 【 display / non-display 】
-
科学スコープ 日本の科学を元気にしたい 研究者らがNPO法人設立 馬場・京大特定准教授が代表理事 情報発信や政策提言も
京都新聞社 京都新聞 夕刊2ページ(科学スコープ) 2022.7
Author:Other
Academic Activities 【 display / non-display 】
-
The International Workshop on Quantum Vacuum in Matter
Role(s): Planning, management, etc.
Hanyu Zhu ( Rice University, Houston, TX, USA ) 2023.10
Type:Academic society, research group, etc.
Rice University, Houston, TX, USA
-
Role(s): Planning, management, etc.
光物性研究会 ( Zoom ) 2020.12
Type:Academic society, research group, etc.
-
第23回光科学若手研究会
Role(s): Planning, management, etc.
光科学若手研究会 ( 大阪府立大学 I-site なんば ) 2019.11
Type:Academic society, research group, etc.
-
Role(s): Planning, management, etc.
応用物理学会 量子エレクトロニクス研究会 ( 上智大学軽井沢セミナーハウス ) 2017.4
Type:Academic society, research group, etc.
-
第16回光科学若手研究会
Role(s): Planning, management, etc.
光科学若手研究会 ( 立命館大学 大阪茨木キャンパス ) 2016.4
Type:Academic society, research group, etc.