305th RQC Seminar

• 講演者

  Prof. Nicolas C Menicucci
  ( RMIT University )

• 日程

  2026年09月24日（木）, 15:00 - 16:00(3:00 p.m.-4:00 p.m.)

• 開催場所

  ハイブリッド（Zoom, 和光地区 統合支援施設2階 大会議室 / Large Meeting Room, 2F, Welfare and Conference Building, Wako Campus (C61)）

• 講演タイトル

  What makes a good GKP state? Logical information, homodyne measurements, and effective squeezing

• お問合せ

  takahiro.mitani[at]riken.jp

講演概要
Gottesman–Kitaev–Preskill (GKP) states offer a route to quantum computing with oscillators, but every experimentally prepared state is imperfect. How should we assess its quality, and what logical information can we extract from it? I will present two complementary approaches we have developed to address these questions. The first makes the decoder explicit in logical tomography and shows how the resulting observables can be reconstructed using homodyne measurements and classical processing. The second connects measurable displacement expectations to moments of periodic probability distributions, allowing bounds on modular readout errors and concentration near the code lattice. Together, these approaches clarify what effective squeezing tells us, what remains undetermined, and how additional measurements improve our assessment.