---
res:
  bibo_abstract:
  - Semiconductor quantum dots (QDs) in planar germanium (Ge) heterostructures have
    emerged as front-runners for future hole-based quantum processors. Here, we present
    strong coupling between a hole charge qubit, defined in a double quantum dot (DQD)
    in planar Ge, and microwave photons in a high-impedance (Zr = 1.3 kΩ) resonator
    based on an array of superconducting quantum interference devices (SQUIDs). Our
    investigation reveals vacuum-Rabi splittings with coupling strengths up to g0/2π = 260 MHz,
    and a cooperativity of C ~ 100, dependent on DQD tuning. Furthermore, utilizing
    the frequency tunability of our resonator, we explore the quenched energy splitting
    associated with strong Coulomb correlation effects in Ge QDs. The observed enhanced
    coherence of the strongly correlated excited state signals the presence of distinct
    symmetries within related spin functions, serving as a precursor to the strong
    coupling between photons and spin-charge hybrid qubits in planar Ge. This work
    paves the way towards coherent quantum connections between remote hole qubits
    in planar Ge, required to scale up hole-based quantum processors.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Franco
      foaf_name: De Palma, Franco
      foaf_surname: De Palma
  - foaf_Person:
      foaf_givenName: Fabian
      foaf_name: Oppliger, Fabian
      foaf_surname: Oppliger
  - foaf_Person:
      foaf_givenName: Wonjin
      foaf_name: Jang, Wonjin
      foaf_surname: Jang
  - foaf_Person:
      foaf_givenName: Stefano
      foaf_name: Bosco, Stefano
      foaf_surname: Bosco
  - foaf_Person:
      foaf_givenName: Marian
      foaf_name: Janik, Marian
      foaf_surname: Janik
      foaf_workInfoHomepage: http://www.librecat.org/personId=396A1950-F248-11E8-B48F-1D18A9856A87
    orcid: 0009-0003-9037-8831
  - foaf_Person:
      foaf_givenName: Stefano
      foaf_name: Calcaterra, Stefano
      foaf_surname: Calcaterra
  - foaf_Person:
      foaf_givenName: Georgios
      foaf_name: Katsaros, Georgios
      foaf_surname: Katsaros
      foaf_workInfoHomepage: http://www.librecat.org/personId=38DB5788-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0001-8342-202X
  - foaf_Person:
      foaf_givenName: Giovanni
      foaf_name: Isella, Giovanni
      foaf_surname: Isella
  - foaf_Person:
      foaf_givenName: Daniel
      foaf_name: Loss, Daniel
      foaf_surname: Loss
  - foaf_Person:
      foaf_givenName: Pasquale
      foaf_name: Scarlino, Pasquale
      foaf_surname: Scarlino
  bibo_doi: 10.1038/s41467-024-54520-7
  bibo_volume: 15
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001362684200001
  dct_isPartOf:
  - http://id.crossref.org/issn/2041-1723
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_title: Strong hole-photon coupling in planar Ge for probing charge degree and
    strongly correlated states@
  fabio_hasPubmedId: '39580488'
...