Uchiyama Laboratory

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Research Theme

Dynamics of Open Quantum Systems,
   Dr. Chikako Uchiyama(Ph.D., Sc.D.), Professor at Univ. of Yamanashi,
   (Visiting Professor at National Institute of Informatics)

News

Dr. Chikako Uchiyama has delivered an invited talk "Master equation approach to line shape -Role of initial correlation in linear response-" at Frontiers of Statistical Physics.FSP2019：Frontiers of Statistical Physics

Paper:"Spin backflow: A non-Markovian effect on spin pumping" was published as(PhysRevB.99.205304) (collaborated work with Dr. Kazunari Hashimoto and Dr. Gen Tatara(RIKEN))

Mr. Yusuke Furuya (M2) gave an oral presentation, "Theoretical study on spin current control using quantum dot with dynamic magnetization" at 74th Annual Meeting, The Physical Society of Japan.

Mr. Haruyuki Yamamoto (M1) gave a poster presentation, "Effect of Coulomb interaction on spinpumping" at the 74th Annual Meeting, The Physical Society of Japan.

Mr. Ryuta Tezuka (M2) gave an oral presentation, "Dynamics of quantum heat engines considering non-Markovian effect" at the 74th Annual Meeting, The Physical Society of Japan.

Dr. Kazunari Hashimoto gave an oral presentation, "Lower bounds for dissipated heat in the spin-boson model" at the 74th Annual Meeting, The Physical Society of Japan.

Mr. Yuki Kawamura (M1) gave a poster presentation, "Temperature dependence of efficiency of energy transport under quantum environmental effect" at the 74th Annual Meeting, The Physical Society of Japan.

Dr. Chikako Uchiyama gave an oral presentation, "Quantum Energy Transport under Environmental Engineering" at the 74th Annual Meeting, The Physical Society of Japan.

Dr. Chikako Uchiyama gave an oral presentation, "Control of energy flow by environmental fluctuation with temporal-spatial correlation" at The Japan Society of Applied Physics Spring Meeting 2019.

Mr. Yusuke Furuya gave a poster presentation, "Spin current control via quantun dot with dynamic magnetization" at The Japan Society of Applied Physics Spring Meeting 2019.

Paper: "Spin backflow: a non-Markovian effect on spin pumping" was uploaded to arXiv:1901.04965

Dr. Kazunari Hashimoto won "The Young Reseacher's Awards in 2018" at the University of Yamanashi.

"International Symposium on Frontiers of Quantum Transport in Nano Science" was held at Institute of Industrial Science, The University of Tokyo.(Nov.7-10)

Paper: "Environmental engineering for quantum energy transport" was published from npj Quantum Information

Dr. Chikako Uchiyama gave an oral presentation "Environmental engineering for quantum energy transport" at "50 Symposium on Mathematical Physics", Nicolaus Copernics Univ. in Torun, Poland.

Proposal titled ``Exploring protocols to control transport of light excitation" (P.I., Dr. Chikako Uchiyama) was approved as MEXT KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas Science of hybrid quantum systems (Grant No.18H04290)

Paper: "Environmental engineering for quantum energy transport" was uploaded to arXiv:1711.01025

Mr. Ryuta Tezuka (M1) gave a poster presentation, " Non-Markovian effect on energy flow" at the Japan Physical Society Autumn meeting（24aPS-31）.

Dr. Kazunari Hashimoto gave an oral presentation "Role of non-adiabaticity in spin pumping" at the Japan Physical Society Autumn meeting (22aJ25-5).

Paper: "Nonadiabaticity in spin pumping under relaxation" was published as Phys. Rev. B 96, 064439 (2017) (collaborated work with Dr. Kazunari Hashimoto and Dr. Gen Tatara(RIKEN))

Paper: "Nonadiabaticity in spin pumping under relaxation" was uploaded to arXiv:1706.00583. (collaborated work with Dr. Kazunari Hashimoto and Dr. Gen Tatara(RIKEN))

Dr. Chikako Uchiyama was allowed to attend the researcher exchange promotion program of the Research Organization of Information and Systems to study about information flow in quantum open systems at National Institute of Informatics.

Paper:〝Energy backflow and non-Markovian dynamics",(a collaborated work with Univ. of Milan) was pulished in Phys. Rev. A 93, 012118.

Paper:〝Dynamics of quantum tomography in an open system" was published in
Physica Scripta, Vol.90, 074064(2015).

Oral Presentation in Conference,“Quantum Control of Light and Matter (QCLM2015)”

Oral Presentation in Conference,“Nonequilibrium Phenomena in Novel Quantum States(YKIS2014)” Slides

Oral Presentation in Conference,“46 Symposium on Mathematical Physics”

Research Topics

Control of Quantum Heat Flux

写真：グラフィックデザイン学科授業風景

Research on heat pumping in microscopic level. 　　

Effects of Initial Correlation

写真：Webデザイン学科授業風景

Researches to clarify effects of initial correlations between system and environment on linear response.

Suppression of Effects of Decoherence on Quantum Information

写真：校舎内カフェ

Researches on methods to suppress effects of decoherence on quantum information.

Projection Operator Method for Open Quantum Systems

写真：会議室

Researches on theoretical frameworks to describe dynamics of quantum open systems.