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Curated by: Qiskit (180 videos)
Episode 155 This week's speaker is Andi Gu. In his own words: I will discuss my recent work revealing a surprising interplay between magic and entanglement in quantum information theory. First, I introduce the phenomenon of 'pseudomagic' - families of quantum states with low magic that are computationally indistinguishable from highly magical states. Pseudomagic challenges our intuition about magic's role in quantum properties like chaos and leads to applications in cryptography and stabilizer testing. Second, I establish a computational separation between an ‘entanglement-dominated’ and ‘magic-dominated’ phase, with sharp distinctions in the ability to efficiently measure and manipulate entanglement between these phases. Applications in witnessing and testing entanglement, as well as implications for many-body physics models, will be discussed. Together, these works elucidate conceptual connections between entanglement and magic while leading to operational insights at the boundary between the classical and quantum. Bio: I am a PhD student at Harvard University in the Quantum Science and Engineering program. I work at the intersection between quantum information and physics. Broadly speaking, I am interested in complexity, both in the statistical mechanical sense (physical systems) and computer science sense (algorithms).