Friday, December 23 2022

15:30 - 16:45

15:30 - 16:45

* Venue | Media Centre |

* Speaker | Sutapa Saha |

* Title | The non-classicality of two information processing tasks in convex operational theories |

Affiliation | ISI-Kolkata |

Abstract | In spite of its immense importance in the present-day information technology, the foundational aspects of quantum theory (QT) remain still illusive. In particular, there is no such set of physically motivated axioms which can answer that why Hilbert space formalism is the only natural choice to describe microscopic world. To shed light on the unique formalism of QT, two different information processing frameworks will be described in the primitive of various convex operational theories. The first one refers to a well-known phenomenon, known as ‘Non-locality without entanglement’, which has been outlined only in QT by Charles Bennett et. al. However, it will be shown that this phenomenon is a general consequence of any non- classical convex operational theory and the nature of such non-locality in QT is restricted compared to the other convex theories. Moreover, the reason behind such restricted non-locality will be explained which captures a specific topology of QT. Thereafter, a distributed computing scenario will be introduced for which the other convex theories except the QT turn out to be equivalent to the classical one even though the theories possess more exotic state and effect spaces. We have coined this particular operational framework as ‘Distributed computation with limited communication’ (DCLC). Furthermore, it will have been shown that the computational strength of quantum communication will be justified in terms of a stronger version of this task, namely the ‘Delayed choice distributed computation with limited communication’ (DC$^2$LC). The proposed task thus provides a new approach to operationally single out quantum theory in the theory-space and hence promises a novel perspective towards the axiomatic derivation of Hilbert space quantum mechanics. Google Meet Link: meet.google.com/brc-ngng-rou |

* Announcement? | Institute |

* Refreshments? | Before the event |

* Honorarium? | None |

Special Arrangements? | Digital Projection |

* Host name and email | Sibasish Ghosh @@ sibasish@imsc.res.in |

Done