---
res:
  bibo_abstract:
  - Higgs and Goldstone modes are collective excitations of the amplitude and phase
    of an order parameter that is related to the breaking of a continuous symmetry.
    We directly studied these modes in a supersolid quantum gas created by coupling
    a Bose-Einstein condensate to two optical cavities, whose field amplitudes form
    the real and imaginary parts of a U(1)-symmetric order parameter. Monitoring the
    cavity fields in real time allowed us to observe the dynamics of the associated
    Higgs and Goldstone modes and revealed their amplitude and phase nature. We used
    a spectroscopic method to measure their frequencies, and we gave a tunable mass
    to the Goldstone mode by exploring the crossover between continuous and discrete
    symmetry. Our experiments link spectroscopic measurements to the theoretical concept
    of Higgs and Goldstone modes.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Julian
      foaf_name: Leonard, Julian
      foaf_surname: Leonard
      foaf_workInfoHomepage: http://www.librecat.org/personId=b75b3f45-7995-11ef-9bfd-9a9cd02c3577
  - foaf_Person:
      foaf_givenName: Andrea
      foaf_name: Morales, Andrea
      foaf_surname: Morales
  - foaf_Person:
      foaf_givenName: Philip
      foaf_name: Zupancic, Philip
      foaf_surname: Zupancic
  - foaf_Person:
      foaf_givenName: Tobias
      foaf_name: Donner, Tobias
      foaf_surname: Donner
  - foaf_Person:
      foaf_givenName: Tilman
      foaf_name: Esslinger, Tilman
      foaf_surname: Esslinger
  bibo_doi: 10.1126/science.aan2608
  bibo_issue: '6369'
  bibo_volume: 358
  dct_date: 2017^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0036-8075
  - http://id.crossref.org/issn/1095-9203
  dct_language: eng
  dct_publisher: American Association for the Advancement of Science@
  dct_title: Monitoring and manipulating Higgs and Goldstone modes in a supersolid
    quantum gas@
  fabio_hasPubmedId: '29242343'
...