Results 1 to 10 of about 2,637,115 (207)

Deriving Three-Outcome Permutationally Invariant Bell Inequalities

Entropy
We present strategies to derive Bell inequalities valid for systems composed of many three-level parties. This scenario is formalized by a Bell experiment with N observers, each of which performs one out of two possible three-outcome measurements on ...
Albert Aloy, Guillem Müller-Rigat, Jordi Tura, Matteo Fadel   +3 more
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Understanding the Quantum Computational Speed-up via De-quantisation [PDF]

Electronic Proceedings in Theoretical Computer Science, 2010
While it seems possible that quantum computers may allow for algorithms offering a computational speed-up over classical algorithms for some problems, the issue is poorly understood.
Cristian S. Calude, Alastair A. Abbott
doaj   +1 more source

Discovering emergent connections in quantum physics research via dynamic word embeddings

Machine Learning: Science and Technology
As the field of quantum physics evolves, researchers naturally form subgroups focusing on specialized problems. While this encourages in-depth exploration, it can limit the exchange of ideas across structurally similar problems in different subfields. To
Felix Frohnert, Xuemei Gu, Mario Krenn, Evert van Nieuwenburg   +3 more
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Nonlocality, integrability and quantum chaos in the spectrum of Bell operators

npj Quantum Information
We introduce a permutationally invariant multipartite Bell inequality for many-body three-level systems and use it to investigate a connection between Bell nonlocality and (lack of) quantum chaos.
Albert Aloy, Guillem Müller-Rigat, Maciej Lewenstein, Jordi Tura, Matteo Fadel   +4 more
doaj   +1 more source

Three-outcome multipartite Bell inequalities: applications to dimension witnessing and spin-nematic squeezing in many-body systems

npj Quantum Information
We present a three-outcome Bell inequality, which we show to be naturally suited to explore nonlocal correlations in many-body spin-1 systems or SU(3) models.
Guillem Müller-Rigat, Albert Aloy, Maciej Lewenstein, Matteo Fadel, Jordi Tura   +4 more
doaj   +1 more source

Hybrid VQE-CVQE algorithm using diabatic state preparation

New Journal of Physics
We propose a hybrid variational quantum algorithm that has variational parameters used by both the quantum circuit and the subsequent classical optimization.
John P T Stenger, C Stephen Hellberg, Daniel Gunlycke   +2 more
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Fermion-to-qubit mappings with varying resource requirements for quantum simulation

New Journal of Physics, 2018
The mapping of fermionic states onto qubit states, as well as the mapping of fermionic Hamiltonian into quantum gates enables us to simulate electronic systems with a quantum computer.
Mark Steudtner, Stephanie Wehner
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On the expressivity of embedding quantum kernels

Machine Learning: Science and Technology
One of the most natural connections between quantum and classical machine learning has been established in the context of kernel methods. Kernel methods rely on kernels, which are inner products of feature vectors living in large feature spaces.
Elies Gil-Fuster, Jens Eisert, Vedran Dunjko   +2 more
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Quantum circuits cannot control unknown operations

New Journal of Physics, 2014
One of the essential building blocks of classical computer programs is the ‘ if ’ clause, which executes a subroutine depending on the value of a control variable.
Mateus Araújo, Adrien Feix, Fabio Costa, Časlav Brukner   +3 more
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Exact and efficient simulation of concordant computation

New Journal of Physics, 2015
Concordant computation is a circuit-based model of quantum computation for mixed states, that assumes that all correlations within the register are discord-free (i.e. the correlations are essentially classical) at every step of the computation.
Hugo Cable, Daniel E Browne
doaj   +1 more source