|  Canonical Quantum Gravity: Models | 
Spherical Symmetry > s.a. FLRW models;
  holography in gravitation; loop quantum gravity;
  quantum black holes; spherical symmetry.
  @ General references:
    Loustó & Mazzitelli IJMPA(91);
    Greensite IJMPA(91);
    Carlip & Teitelboim CQG(95)gq [black holes, opening angle at the horizon];
    Hollmann gq/96 [as sigma-model];
    Kenmoku G&C(99);
    Brahma PRD(15)-a1411 [densitized triad variables];
    Kagan a1512 [anomaly freedom];
    Casadio et al GRG(17)-a1605 [global gravitational radius operator].
  @ Symmetry reduction in lqg: Alesci & Cianfrani PRD(13)-a1301 [inhomogeneous Bianchi I];
    Bodendorfer & Zipfel CQG(16)-a1512;
    Hanusch CMP(16)-a1307,
    a1601-PhD [invariant connections and symmetry reduction];
    Bodendorfer et al PLB(15)-a1410;
    Ashtekar IJMPD(16)-a1605 [overview, and lqc];
    Bilski et al a1707
      [Quantum Reduced Loop Gravity, isotropic cosmology];
    Alesci et al PRD(18)-a1807 [evolving spherically symmetric black hole initial data sets];
    Bilski & Marcianò PRD(20)-a1905 [Quantum Reduced Loop Gravity, critical analysis];
    Kelly et al PRD(20)-a2006.
  @ Connection representation: Thiemann & Kastrup NPB(93)gq;
    Thiemann in(94)gq/99,
    in(94)gq/99 [+ Maxwell field];
    Thiemann NPB(95);
    Bojowald CQG(04)gq [states and operators];
    Bojowald & Swiderski CQG(04)gq [volume operator],
    CQG(06)gq/05 [Hamiltonian constraint];
    Bojowald PRL(05)gq [absence of singularities];
    Campiglia et al CQG(07)gq,
    AIP(08)-a0712;
    Gambini & Pullin PRL(08)-a0805 [Schwarzschild black holes],
    ASL(09)-a0807 [diffeomorphism symmetry];
    Kunstatter et al PRD(10)-a0910 [Einstein-Rosen wormhole throat, polymer];
    Borja et al CQG(12)-a1201 [with a massless scalar field];
    Chiou et al a1212
      [and maximally extended Schwarzschild spacetime];
    Corichi & Singh CQG(16)-a1506 [Schwarzschild interior];
    Mäkelä PRD-a1506 [thermodynamics];
    Bojowald et al PRD(15)-a1507 [abelianization and covariance];
    Gambini et al a2006 [improved dynamics].
  @ With matter shells: Berezin et al PRD(98)gq/97 [dust shells, black holes and wormholes];
    Hájíček NPB(01)ht/00 [null shell, group quantization];
    Ambrus & Hájíček PRD(05)gq [null dust];
    Gambini & Pullin CQG(15)-a1408,
    Campiglia et al CQG(16)-a1601 [null shells in a lqg spacetime];
    Kiefer a1512-MG14 [spherical dust shell];
    Ziprick et al PRD(16)-a1609 [polymer quantization].
  @ With a scalar field:
    Pinheiro & Khanna ht/00;
    Husain & Winkler PRD(05)gq [black hole];
    Álvarez et al PRL(12)-a1111.
  @ Collapse: Hájíček et al PRD(92) [as Coulomb problem];
    Hájíček CMP(92),
    NPPS(00)gq/99;
    Hawkins PRD(94);
    Myers GRG(97)gq [pure/mixed states];
    Varadarajan PRD(98)gq;
    Vaz et al PRD(01) [with dust];
    Vaz & Witten PRD(01) [black holes from dust];
    Corichi et al PRD(02)gq/01 [dust shell];
    Hájíček LNP(03)gq/02;
    Husain & Winkler PRD(06)gq/06 [spherical];
    Vachaspati CQG(09)-a0711 [Schrödinger picture];
    Husain in(07)-a0801 [rev];
    Modesto IJTP(08) [minisuperspace, lqg methods];
    Husain & Terno PRD(10)-a0903 [with a scalar field];
    Greenwood PhD(10)-a1001;
    Kreienbuehl et al CQG(12)-a1011 [modified general relativity];
    Vaz & Witten GRG(11)-a1111 [spherical, dust];
    Tavakoli et al IJMPD(14)-a1303 [loop quantum dynamics];
    Saini & Stojković PRD(14)-a1401 [non-local but non-singular physics near the singularity];
    Vaz NPB(15)-a1407 [dust, no black hole];
    > s.a. 3D quantum gravity; gravitational collapse
      [semiclassical]; singularities in quantum gravity.
  @ With other matter: Thiemann IJMPD(94)gq/99,
    NPB(95)gq/99 [lqg + electromagnetism + cosmological constant];
    Gambini et al CQG(09)-a0906 [uniform discretization + master constraint],
    GRG(11)-a1105 [scalar propagator and Lorentz invariance];
    > s.a. semiclassical gravity.
Other Reductions to Fewer Degrees of Freedom
  > s.a. loop quantum gravity [special solutions].
  * Midisuperspace models:
    A theory with infinitely many degrees of freedom (a field theory) obtained
    by reducing the superspace of a parent gravitational theory to a proper
    subset of metrics, usually through a symmetry reduction; Examples are
    spherical symmetry and cylindrical symmetry.
  * Minisuperspace models: A
    canonical gravitational theory in which the number of degrees of freedom
    has been reduced to a finite number.
  @ Models: Torre IJTP(99)gq/98-in [general theory];
    Beetle ATMP(98)gq [toroidal];
    Alexandrov et al CQG(98) [SU(2)-invariant];
    Bojowald & Kastrup CQG(00)ht/99 [symmetry reduction];
    Brodbeck & Zagermann CQG(00)gq/99 [in self-dual representation];
    Glinka ONCP(09)-a0809 [one-dimensional, classical limit];
    Christodoulakis et al CQG(10)-a0901 [geometries admitting maximally-symmetric 2D surfaces];
    Alesci & Cianfrani a1506-PoS,
    Bilski et al PRD(15)-a1506 [quantum reduced];
    Gerhardt a1608 [AdS black holes];
    Gambini et al CQG(20)-a2001 [axisymmetric];
    > s.a. minisuperspace; quantum black holes;
      quantum cosmology.
  @ Midisuperspace models: Husain & Pullin MPLA(90) [one Killing vector field, connection and loop representations];
    Barbero & Villaseñor LRR(10)-a1010 [rev];
    Adelman et al CQG(15)-a1401 [Minkowski space];
    > s.a. gowdy spacetimes.
  @ Plane waves:
    Berger & Matsuki PRD(89);
    Ashtekar & Pierri JMP(96)gq;
    Neville PRD(97),
    PRD(97) [connection representation];
    Mena & Montejo PRD(98)gq,
    PRD(00)gq/99;
    Barbero et al PRD(04)gq [Fock spaces];
    Adelman et al CQG(15)-a1401 [volume and length fluctuations].
  @ Plane waves, lqg techniques:
    Hinterleitner & Major PRD(11)-a1006,
    CQG(12)-a1106;
    Neville a1305 [semiclassical limit];
    Hinterleitner a1703.
  @ Cylindrical waves: Kuchař PRD(71);
    Mena PRD(96)gq/95;
    Korotkin & Samtleben PRL(98)gq/97;
    Cruz et al PLB(98)gq;
    Varadarajan CQG(00)gq/99;
    Niedermaier & Samtleben NPB(00)ht/99;
    Angulo & Mena IJMPD(00)gq;
    Barbero et al PRD(03)gq [choice of time];
    Cho & Varadarajan CQG(06);
    Varadarajan IJMPD(06).
  @ Cylindrical + matter: Barbero et al PRL(05)gq,
    PRD(06)gq [massless scalar].
  @ Timelike symmetries: Korotkin & Nicolai PRL(95)ht/94 [stationary axisymmetric];
    Ma PRD(02)gq/01 [static → 2+1 Euclidean gravity + Klein-Gordon field].
Other Types of Metrics > s.a. connection representation;
  quantum black holes; quantum geometry.
  @ Perturbations: Vaz et al PRD(03) [around a black hole, thermal bath].
  @ Degenerate metrics: Bojowald CQG(06)gq/05 [lqg].
  @ Fractional dimensions: Tibrewala PRD(16)-a1503 [spherically symmetric].
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