CQI seminar: Ryan Mark Samolis
by william.schober＠usi.ch
Dear friends,
On September 15th at 14:00 in D5.01 we'll have a guest seminar by Ryan Mark Samolis, a Master's student from the University of Zurich. Ryan will talk to us about contextuality; see the title and abstract below.
Best regards,
Will Schober
title:
Leifer’s Generalized Zeno Effect is a proof of Contextuality
abstract:
The field of quantum foundations probes the boundary between genuinely quantum and semi-classical phenomena. Modern hidden variable theories allow us to emulate aspects of quantum mechanics, like entanglement and uncertainty relations, previously attributed exclusively to quantum models. Contextuality, a generalization of Bell nonlocality, captures this essence of “quantum weirdness”. One way to prove contextuality for a given phenomenon involves showing measurement statistics cannot be reproduced by modern hidden variable models. This thesis concerns Zeno-type effects which involve performing frequent projective measurements to “freeze” the time evolution of a quantum state. Matthew Leifer recently argued the quantum Zeno effect only occurs in contextual models. We utilize a noncontextual model of operational process theories to find a probability bound of successfully freezing this evolution.
3 weeks
CQI Seminar: Andrea Franzetti
by william.schober＠usi.ch
Dear friends,
On September 8th at 11:00 in D4.01 we'll have a guest seminar by Andrea Franzetti, who just completed a MSc. in Physics from the University of Pavia. Andrea will be telling us about quantifying magicness of ferminonic non-Gaussianity in the framework of Quantum Resource Theories, title and abstract below.
Best regards,
Will Schober
Title: Towards Fermionic Resource Theories of Computational Advantage
Abstract: "The stabilizer formalism relies on the Gottesman-Knill theorem: every quantum computer composed of Clifford unitaries and Pauli measurements is efficiently simulable by a classical computer. Non-stabilizerness, or magic, is the resource associated with the departure from this classically simulable regime, and is necessary for universal quantum computation. In this seminar, magic will be described within the framework of Quantum Resource Theories (QRTs), where stabilizer states are the free states and stabilizer operations (SO) are the free operations. We address the quantification of magic through suitable resource-measuring functions, called monotones. In particular, we will show that the 𝛼-Stabilizer Rényi Entropies fail to completely characterize magic in the single-shot regime. Additionaly, we will focus on non-classical simulability in fermionic systems, showing that the fermionic Gaussian simulability paradigm is intrinsically different from the stabilizer one. This motivates a QRT of fermionic non-Gaussianity, where fermionic Gaussian states and operations (FGO) are free. We will introduce a novel monotone, the entropy of non-Gaussianity, defined as the quantum relative entropy between a fermionic state and its Gaussianization, establishing its key properties."
3 weeks, 5 days