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Mean Field Approximation for Identical Bosons on the Complete Graph

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arxiv 1910.14521 v1 pith:PSMIX5BB submitted 2019-10-31 quant-ph math-phmath.MP

classification quant-phmath-phmath.MP
keywords approximationfieldmeanagreementbosonscompletegraphidentical
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abstract

Non-linear dynamics in the quantum random walk setting have been shown to enable conditional speedup of Grover's algorithm. We examine the mean field approximation required for the use of the Gross-Pitaevskii equation on identical bosons evolving on the complete graph. We show that the states of such systems are parameterized by the basis of Young diagrams and determine their one- and two-party marginals. We find that isolated particles are required for good agreement with the mean field approximation, proving that without isolated particles the matrix fidelity agreement is bounded from above by $1/2$.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. From spin squeezing to fast state discrimination

    quant-ph 2024-10 unverdicted novelty 5.0 of 10

    In the large-N limit, spin squeezing torsion yields a nonlinear qubit governed by the two-state Gross-Pitaevskii equation that solves single-input state discrimination on the Bloch sphere.

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