Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring geometric phases with a dynamical quantum Zeno effect in a
  Bose-Einstein condensate   A closed-trajectory evolution of a quantum state generally imprints a phase
that contains both dynamical and geometrical contributions. While dynamical
phases depend on the reference system, geometric phase factors are uniquely
defined by the properties of the outlined trajectory. Here, we generate and
measure geometric phases in a Bose-Einstein condensate of $^{87}$Rb using a
combination of dynamical quantum Zeno effect and measurement-free evolution. We
show that the dynamical quantum Zeno effect can inhibit the formation of a
geometric phase without altering the dynamical phase. This can be used to
extract the geometric Aharonov-Anandan phase from any closed-trajectory
evolution without requiring knowledge or control of the Hamiltonian.

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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th