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- Universidad Autónoma de MadridES618 papers
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21 papers · 2 filters
Fundamental limitations in the purifications of tensor networks
G. De las Cuevas, T. S. Cubitt, J. I. Cirac +2
We show a fundamental limitation in the description of quantum many-body mixed states with tensor networks in purification form. Namely, we show that there exist mixed states which…
Size-Driven Quantum Phase Transitions
Johannes Bausch, Toby S. Cubitt, Angelo Lucia +2
Can the properties of the thermodynamic limit of a many-body quantum system be extrapolated by analysing a sequence of finite-size cases? We present a model for which such an appro…
Survey on Nonlocal Games and Operator Space Theory
Carlos Palazuelos, Thomas Vidick
This review article is concerned with a recently uncovered connection between operator spaces, a noncommutative extension of Banach spaces, and quantum nonlocality, a striking phen…
Generalized isotropic Lipkin-Meshkov-Glick models: ground state entanglement and quantum entropies
Jose A. Carrasco, Federico Finkel, Artemio Gonzalez-Lopez +2
We introduce a new class of generalized isotropic Lipkin-Meshkov-Glick models with su spin and long-range non-constant interactions, whose non-degenerate ground state is a D…
Logically reversible measurements: Construction and application
Sunho Kim, Juncheng Wang, Asutosh Kumar +2
We show that for any von Neumann measurement, we can construct a logically reversible measurement such that Shannon entropies and quantum discords induced by the two measurements h…
An almost convincing scheme for discriminating the preparation basis of quantum ensemble and why it will not work
Sandeep K Goyal, Rajeev Singh, Sibasish Ghosh
Mixed states of a quantum system, represented by density operators, can be decomposed as a statistical mixture of pure states in a number of ways where each decomposition can be vi…