RQC Seminar

23rd RQC Seminar

  • 講演者

    Prof. Christian Flindt
    (Aalto University）

  • 日程

    2022年12月20日（火）15:00-16:00（JST）

  • 開催場所

    ハイブリッド（Zoom ・ 理研　和光事業所　本部棟2階　大会議室）

  • 講演タイトル

    Cooper pair splitting in real-time

  • お問合せ

    rqc_info[at]ml.riken.jp

講演概要
Cooper pair splitters are promising candidates for generating spin-entangled electrons. By splitting the Cooper pairs in a superconductor into different normal-state leads, spin-entanglement between spatially separated electrons can be achieved. In this talk, I will give an overview of our recent works on Cooper pair splitters [1-5]. I will discuss our proposal for observing and characterizing the splitting of Cooper pairs in real-time as well as its experimental realization [2,3]. I will then go on to talk about two proposals for controlling the splitting of Cooper pairs using time-dependent gate voltages [4]. Finally, if time allows, I will discuss how an entanglement witness can be formulated in terms of current cross-correlation measurements, which makes it possible to detect the entanglement of the split Cooper pairs [5].

[1] N. Walldorf, F. Brange, C. Padurariu, and CF, Phys. Rev. B 101, 205422 (2020)
[2] N. Walldorf, C. Padurariu, A.-P. Jauho, and CF, Phys. Rev. Lett. 120, 087701 (2018)
[3] A. Ranni, F. Brange, E. T. Mannila, CF, and V. F. Maisi, Nat. Commun. 12, 6358 (2021)
[4] F. Brange, K. Prech, and CF, Phys. Rev. Lett. 127, 237701 (2021)
[5] M. Tam, CF, and F. Brange, Phys. Rev. B 104, 245425 (2021)


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