Format results
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General conditions for universality of Quantum Hamiltonians
Tamara Kohler - Complutense University of Madrid
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Multipartite entanglement: combinatorics, topology, and ... astronomy
Karol Zyczkowski - Jagiellonian University
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Efficient simulatability of continuous-variable circuits with large Wigner negativity
Laura García-Álvarez - Chalmers University of Technology
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Quantum preparation games
Mirjam Weilenmann - Austrian Academy of Sciences
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Area law, topological quantum field theory, and the quantum marginal problem
Isaac Kim - University of California, Davis
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The theory of quantum information: channels, capacities, and all that
Graeme Smith - University of Colorado Boulder
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Collisions of false-vacuum bubble walls in a quantum spin chain
Ashley Milsted - California Institute of Technology
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Entangled subspaces and generic local state discrimination with pre-shared entanglement
Benjamin Lovitz - Institute for Quantum Computing (IQC)
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Complexity phase diagrams
Abinhav Deshpande - University of Maryland, College Park
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Non-local quantum computation and holography
Alex May - Perimeter Institute for Theoretical Physics
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General conditions for universality of Quantum Hamiltonians
Tamara Kohler - Complutense University of Madrid
Recent work has defined what it means for one quantum system to simulate the full physics of another, and demonstrated that—within a very demanding definition of simulation —there exist families of local Hamiltonians that are universal, in the sense that they can simulate all other quantum… -
Multipartite entanglement: combinatorics, topology, and ... astronomy
Karol Zyczkowski - Jagiellonian University
A brief introduction to entanglement of multipartite pure quantum states will be given. As the Bell states are known to be maximally entangled among all two-qubit quantum states, a natural question arises: What is the most entangled state for the quantum system consisting of N sub-systems with d… -
Fast estimation of outcome probabilities for quantum circuits
Hakop Pashayan - Foxconn
We present two classical algorithms for the simulation of universal quantum circuits on n qubits constructed from c instances of Clifford gates and t arbitrary-angle Z-rotation gates such as T gates. Our algorithms complement each other by performing best in different parameter regimes. The Estimate… -
Speck of Chaos
Lea Santos - Yeshiva University
It has been shown that, despite being local, a perturbation applied to a single site of the one-dimensional XXZ model is enough to bring this interacting integrable spin-1/2 system to the chaotic regime. In this talk, we show that this is not unique to the XXZ model, but happens also to the spin-1/2… -
Efficient simulatability of continuous-variable circuits with large Wigner negativity
Laura García-Álvarez - Chalmers University of Technology
Discriminating between quantum computing architectures that can provide quantum advantage from those that cannot is of crucial importance. From the fundamental point of view, establishing such a boundary is akin to pinpointing the resources for quantum advantage; from the technological point of view… -
Quantum preparation games
Mirjam Weilenmann - Austrian Academy of Sciences
To analyze the performance of adaptive measurement protocols for the detection and quantification of state resources, we introduce the framework of quantum preparation games. A preparation game is a task whereby a player sequentially sends a number of quantum states to a referee, who probes each of… -
Area law, topological quantum field theory, and the quantum marginal problem
Isaac Kim - University of California, Davis
Many physical states of interest, such as ground states of gapped quantum many-body systems, are expected to obey an area law of entanglement entropy. I will report on a series of recent results that suggest a deep connection between area law and two seemingly unrelated subjects: topological quantum… -
The theory of quantum information: channels, capacities, and all that
Graeme Smith - University of Colorado Boulder
Information theory offers mathematically precise theory of communication and data storage that guided and fueled the information age. Initially, quantum effects were thought to be an annoying source of noise, but we have since learned that they offer new capabilities and vast opportunities. Quantum… -
Collisions of false-vacuum bubble walls in a quantum spin chain
Ashley Milsted - California Institute of Technology
We study the real-time dynamics of a small bubble of "false vacuum'' in a quantum spin chain near criticality, where the low-energy physics is described by a relativistic (1+1)-dimensional quantum field theory. Such a bubble can be thought of as a confined kink-antikink pair (a meson). We carefully… -
Entangled subspaces and generic local state discrimination with pre-shared entanglement
Benjamin Lovitz - Institute for Quantum Computing (IQC)
Walgate and Scott have determined the maximum number of generic pure quantum states in multipartite space that can be unambiguously discriminated by an LOCC measurement [Journal of Physics A: Mathematical and Theoretical, 41:375305, 08 2008]. In this work, we determine this number in a more general… -
Complexity phase diagrams
Abinhav Deshpande - University of Maryland, College Park
In this talk, I argue that the question of whether a physical system can be simulated on a computer is important not just from a practical perspective but also a fundamental one. We consider the complexity of simulating Hamiltonians with respect to both dynamics and equilibrium properties. This… -
Non-local quantum computation and holography
Alex May - Perimeter Institute for Theoretical Physics
Relativistic quantum tasks are quantum computations which have inputs and outputs that occur at designated spacetime locations. Understanding which tasks are possible to complete, and what resources are required to complete them, captures spacetime-specific aspects of quantum information. In this…