日本語
The University of Electro-Communications 
Graduate School of Informatics and Engineering, School of Informatics and Engineering 
"Department of Computer and Network Engineering, Cluster II (Emerging Multi-interdisciplinary Engineering)" 

Assistant Professor 
HIROYASU TAJIMA 

Academic degrees
博士(理学)  The University of Tokyo 

Classes responsible within the university
2020  情報通信工学実験A/B・電子情報学実験A/B 2020年度 後期 情報理工学域 Ⅱ類  Fall semester  Undergraduate, daytime 
View details...

Classes responsible in other universities
2019  集中講義:保存則のもとでの量子操作・測定への制限  大阪市立大学 
2019  集中講義:保存則のもとでの量子操作・測定への制限  京都大学 
View details...

Current research areas
Mathematical physics/ Fundamental condensed matter physics 
Atomic/Molecular/Quantum electronics 

Current research subjects
リソース理論に基づく量子測定・操作の統一的限界  2019/04/01-Present 

Published papers
Paper  No  Symmetry hinders quantum information recovery  Joint  arxiv preprint  arXiv/ arXiv:2103.01876, 1-35  2021/03/02 
Paper  Yes  Coherence cost for violating conservation laws  Joint  Hiroyasu Tajima, Naoto Shiraishi, Keiji Saito  Physical Review Research  2/ 043374, 1-23  2020/12/15  10.1103/PhysRevResearch.2.043374 
Paper  No  Superconducting-like heat current: Effective cancellation of current-dissipation trade off by quantum coherence  Hiroyasu Tajima, Ken Funo  arxiv preprint  arXiv:2004.13412, 1-17  2020/04/28  URL 
Paper  Yes  Universal limitations on implementing resourceful unitary evolutions  Joint  Ryuji Takagi, Hiroyasu Tajima  Physical Review A  101/ 2, 022315-1-022315-10  2020/02/12 
Paper  No  Coherence-variance uncertainty relation and coherence cost for quantum measurement under conservation laws  Hiroyasu Tajima, Hiroshi Nagaoka  arxiv preprint  arXiv:1909.029, 1-12  2019/09/06  URL 
View details...

Research presentations
Oral presentation for an academic conference  coherence cost for measurement and computation under conservation laws  Quantum Information Processing 2020 (QIP2020)  2020 year/ 1st day  Yes  2020/01/06 
Oral presentation for an academic conference  測定実装のためのコヒーレンス・コストの漸近等式: Wigner-Araki-Yanase theoremの改善  日本物理学会  2019年/ 秋  Yes  田島裕康  2019/09/12 
Oral presentation for an academic conference  Fundamental exchange rate between coherence and asymmetry  Quantum Information and String Theory 2019  3rd week/ 2nd day  Yes  Hiroyasu Tajima  2019/06/11 
Invited lecture for an international conference  Limitation on quantum information processing under conservation laws  APPC2019(14Th ASIA-PACIFIC PHYSICS CONFERENCE)  Yes  Hiroyasu Tajima  2019/11 
Invited lecture for a domestic conference  ユニタリ実装のコヒーレンスコストと、量子熱機関への応用:不確定性関係がもたらす影響  量子多体系の熱力学ーー数理の発展と展望  No  2020/09/14 
View details...

Researcher accepted
Domestic  Post-doctoral researcher  2021-Present 
View details...

Grants-in-aid for scientific research
リソース理論に基づく量子測定・操作の統一的限界  Early-Career Scientists  2019/04/01-2023/03/31 
View details...

External fund
JSTさきがけ:量子情報幾何に基づく、対称性・不可逆性・量子性の統一的理論の構築と応用  Other grants  科学技術振興機構(JST)  戦略的創造研究推進事業  2020/11/01-2024/03/31 
View details...

Past records of joint or funded research
Moonshot:誤り耐性型量子コンピュータの新規手法・応用の萌芽的研究開発  2020-2031  Commissioned research  Other 
View details...

Public lectures
対称性のリソース理論:保存則の元での測定・操作の原理的限界  2020/09/28 
View details...

Educational support at other universities
非常勤講師  集中講義:保存則のもとでの量子操作・測定への制限 (京都大学にて)  2019/11-Present 
非常勤講師  集中講義:保存則のもとでの量子操作・測定への制限 (大阪市立大学にて)  2019/09-Present 
View details...