Quantum matter is weakly entangled at low energies
Samuel Garratt
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Multiparty Entanglement in Quantum Matter
Liuke Lyu - Université de Montreal - Département de physique
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Local Topological Markers for Disordered, Interacting, and Mixed States
Julia Hannukainen
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Quantum Breakdown Model and the Exponential U(1) Symmetry
Biao Lian - Princeton University
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Quantum matter is weakly entangled at low energies
Samuel Garratt
The study of entanglement in the ground states of locally interacting many-body quantum systems has provided connections between spectral properties and the computational resources required for tensor-network calculations. Generic quantum states have volume-law entanglement, but ground states are… -
Multiparty Entanglement in Quantum Matter
Liuke Lyu - Université de Montreal - Département de physique
Entanglement provides a powerful framework for characterizing quantum phases. The reduced density matrix (RDM) of a local region is known to encode non-trivial information about the phase of matter, as demonstrated by topological entanglement entropy and the Li-Haldane conjecture. We argue that this… -
Entanglement bootstrap for quantum phases of matter
Xiang Li
Entanglement bootstrap (EB) is a framework that aims to explain all the universal properties of quantum phases of matter from entanglement conditions. In this seminar, I will talk about our efforts in building such an EB framework for 2+1D chiral gapped phases. Many interesting properties that do… -
Remote detection in abelian fracton phases - Quantum Matter Seminar
Evan Wickenden
Gapped phases without symmetry are largely characterized by the fusion and statistics of their fractionalized quasiparticles. This is best understood for 2D topological phases. An important constraint on statistical data in this case is the principle of remote detectability, which implies that any… -
Designs from magic-augmented Clifford circuits
Yimu Bao
In this talk, I will introduce magic-augmented Clifford circuits -- architectures in which Clifford circuits are preceded and/or followed by constant-depth circuits of non-Clifford (``magic") gates -- as a resource-efficient way to realize approximate k-designs. We prove that shallow Clifford… -
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Complexity of quantum many-body dynamics - Quantum Matter Seminar
Xiehang Yu
In this talk, I will discuss the projects I have done in my Ph.D. https://scholar.google.com/citations?user=SiMLZi8AAAAJ&hl=en. My research lies at the intersection of quantum many-body physics and quantum information, aiming to unravel the intrinsic complexity of many-body dynamics using both… -
Local Topological Markers for Disordered, Interacting, and Mixed States
Julia Hannukainen
The topology of crystalline insulators and superconductors is characterized by established momentum-space invariants such as the Chern number. In amorphous and other disordered systems, however, momentum is no longer a good quantum number, and recent observations of topological edge states in… -
Quantum Breakdown Model and the Exponential U(1) Symmetry
Biao Lian - Princeton University
I will talk about the 1D quantum breakdown model in boson and spin systems, which has an exponential U(1) symmetry with charge decaying exponentially in space. We show that the ground state of the model exhibits a phase transition from a symmetric paramagnetic phase to a quantum breakdown condensate… -
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Cooling algorithms for quantum many-body state preparation
Jerome Lloyd
Preparation of thermal and ground states of many-body systems is a central challenge for quantum processors, needed e.g. as the starting point for many quantum physics experiments or for quantum chemistry applications. In this talk, I will discuss recent work on efficient state preparation using… -
Many-body localization in quasiperiodic systems
Yi-Ting Tu
Although many-body localization (MBL) is most widely studied for systems with random potentials, various interesting phenomena occur naturally in quasiperiodic potentials. In particular, there is the lack of low-disorder rare regions which may destabilize MBL, the existence of a regime which is non…