Pub Date : 2023-09-12DOI: 10.1140/epjs/s11734-023-00980-9
Till Dolejsky, Erik Fitzke, Lucas Bialowons, Maximilian Tippmann, Oleg Nikiforov, Thomas Walther
Abstract Recently, we implemented a basic star-shaped entanglement-based quantum key distribution network without trusted nodes. It enables simultaneous pairwise exchange of quantum keys between multiple users. In this paper, we demonstrate its flexibility by focusing on several aspects. We show continuous system operation over a partially deployed 100 km fiber link for multiple days as well as dynamic reconfiguration of the communication partners. The photon pair source enables type-II or type-0 photon pair generation by SPDC as well as various demultiplexing strategies and repetition rates.
{"title":"Flexible reconfigurable entanglement-based quantum key distribution network","authors":"Till Dolejsky, Erik Fitzke, Lucas Bialowons, Maximilian Tippmann, Oleg Nikiforov, Thomas Walther","doi":"10.1140/epjs/s11734-023-00980-9","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00980-9","url":null,"abstract":"Abstract Recently, we implemented a basic star-shaped entanglement-based quantum key distribution network without trusted nodes. It enables simultaneous pairwise exchange of quantum keys between multiple users. In this paper, we demonstrate its flexibility by focusing on several aspects. We show continuous system operation over a partially deployed 100 km fiber link for multiple days as well as dynamic reconfiguration of the communication partners. The photon pair source enables type-II or type-0 photon pair generation by SPDC as well as various demultiplexing strategies and repetition rates.","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135826675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-12DOI: 10.1140/epjs/s11734-023-00974-7
Aleksandr N. Mikheev, Ido Siovitz, Thomas Gasenzer
Abstract Closed quantum systems far from thermal equilibrium can show universal dynamics near attractor solutions, known as non-thermal fixed points, generically in the form of scaling behaviour in space and time. A systematic classification and comprehensive understanding of such scaling solutions are tasks of future developments in non-equilibrium quantum many-body theory. In this tutorial review, we outline several analytical approaches to non-thermal fixed points and summarise corresponding numerical and experimental results. The analytic methods include a non-perturbative kinetic theory derived within the two-particle irreducible effective action formalism, as well as a low-energy effective field theory framework. As one of the driving forces of this research field are numerical simulations, we summarise the main results of exemplary cases of universal dynamics in ultracold Bose gases. This encompasses quantum vortex ensembles in turbulent superfluids as well as recently observed real-time instanton solutions in one-dimensional spinor condensates.
{"title":"Universal dynamics and non-thermal fixed points in quantum fluids far from equilibrium","authors":"Aleksandr N. Mikheev, Ido Siovitz, Thomas Gasenzer","doi":"10.1140/epjs/s11734-023-00974-7","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00974-7","url":null,"abstract":"Abstract Closed quantum systems far from thermal equilibrium can show universal dynamics near attractor solutions, known as non-thermal fixed points, generically in the form of scaling behaviour in space and time. A systematic classification and comprehensive understanding of such scaling solutions are tasks of future developments in non-equilibrium quantum many-body theory. In this tutorial review, we outline several analytical approaches to non-thermal fixed points and summarise corresponding numerical and experimental results. The analytic methods include a non-perturbative kinetic theory derived within the two-particle irreducible effective action formalism, as well as a low-energy effective field theory framework. As one of the driving forces of this research field are numerical simulations, we summarise the main results of exemplary cases of universal dynamics in ultracold Bose gases. This encompasses quantum vortex ensembles in turbulent superfluids as well as recently observed real-time instanton solutions in one-dimensional spinor condensates.","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135826230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-06DOI: 10.1140/epjs/s11734-023-00965-8
Kang Wang, Zhenhai Li
{"title":"Steered molecular dynamics simulation of force triggering the integrin αIIbβ3 extension via its ligand","authors":"Kang Wang, Zhenhai Li","doi":"10.1140/epjs/s11734-023-00965-8","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00965-8","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47816415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-06DOI: 10.1140/epjs/s11734-023-00979-2
A. Plotnitsky
{"title":"t is not time: reality, causality, and the arrow of events in quantum theory","authors":"A. Plotnitsky","doi":"10.1140/epjs/s11734-023-00979-2","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00979-2","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48787646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1140/epjs/s11734-023-00961-y
G. Rahman, J. Gómez-Aguilar, D. Ahmad
{"title":"Modeling and analysis of an implicit fractional order differential equation with multiple first-order fractional derivatives and non-local boundary conditions","authors":"G. Rahman, J. Gómez-Aguilar, D. Ahmad","doi":"10.1140/epjs/s11734-023-00961-y","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00961-y","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49452236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1140/epjs/s11734-023-00972-9
Malte Krug, Jürgen Stockburger
{"title":"On stability issues of the HEOM method","authors":"Malte Krug, Jürgen Stockburger","doi":"10.1140/epjs/s11734-023-00972-9","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00972-9","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46599333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1140/epjs/s11734-023-00973-8
Michael Suleymanov, Eliahu Cohen
{"title":"Quantum frames of reference and the relational flow of time","authors":"Michael Suleymanov, Eliahu Cohen","doi":"10.1140/epjs/s11734-023-00973-8","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00973-8","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48852476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1140/epjs/s11734-023-00983-6
Franklin J. Vivanco, Amilson R. Fritsch, A. D. García-Orozco, M. A. Moreno-Armijos, Gustavo D. Telles, Pedro E. S. Tavares, V. Bagnato
{"title":"Energy cascade in a far-from-equilibrium inhomogeneous trapped Bose gas obtained by power spectrum analysis","authors":"Franklin J. Vivanco, Amilson R. Fritsch, A. D. García-Orozco, M. A. Moreno-Armijos, Gustavo D. Telles, Pedro E. S. Tavares, V. Bagnato","doi":"10.1140/epjs/s11734-023-00983-6","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00983-6","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42163510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1140/epjs/s11734-023-00947-w
I. Sakthi, Raja Das, P. B. A. Reddy
{"title":"Entropy generation on MHD flow of second-grade hybrid nanofluid flow over a converging/diverging channel: an application in hyperthermia therapeutic aspects","authors":"I. Sakthi, Raja Das, P. B. A. Reddy","doi":"10.1140/epjs/s11734-023-00947-w","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00947-w","url":null,"abstract":"","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43944721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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