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  "authors": [
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Max-Planck-Institut f\u00fcr Gravitationsphysik (Albert-Einstein-Institut), Am M\u00fchlenberg 1, Golm, Potsdam, D-14476, Germany", 
          "organization": "Max-Planck-Institut f\u00fcr Gravitationsphysik (Albert-Einstein-Institut)"
        }
      ], 
      "surname": "Alonso-Serrano", 
      "email": "ana.alonso.serrano@aei.mpg.de", 
      "full_name": "Alonso-Serrano, Ana", 
      "given_names": "Ana"
    }, 
    {
      "affiliations": [
        {
          "country": "Canada", 
          "value": "Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada", 
          "organization": "University of Waterloo"
        }, 
        {
          "country": "Canada", 
          "value": "Institute for Quantum Computing, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada", 
          "organization": "University of Waterloo"
        }
      ], 
      "surname": "Tjoa", 
      "email": "erickson.tjoa@uwaterloo.ca", 
      "full_name": "Tjoa, Erickson", 
      "given_names": "Erickson"
    }, 
    {
      "affiliations": [
        {
          "country": "Spain", 
          "value": "Departamento de F\u00edsica Te\u00f3rica and IPARCOS, Universidad Complutense de Madrid, Plaza de las Ciencias 1, Madrid, 28040, Spain", 
          "organization": "Universidad Complutense de Madrid"
        }, 
        {
          "country": "Spain", 
          "value": "Instituto de Estructura de la Materia (IEM-CSIC), Serrano 121, Madrid, 28006, Spain", 
          "organization": "Instituto de Estructura de la Materia (IEM-CSIC)"
        }
      ], 
      "surname": "Garay", 
      "email": "luisj.garay@ucm.es", 
      "full_name": "Garay, Luis", 
      "given_names": "Luis"
    }, 
    {
      "affiliations": [
        {
          "country": "Canada", 
          "value": "Department of Applied Mathematics, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada", 
          "organization": "University of Waterloo"
        }, 
        {
          "country": "Canada", 
          "value": "Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada", 
          "organization": "University of Waterloo"
        }, 
        {
          "country": "Canada", 
          "value": "Perimeter Institute for Theoretical Physics, 31 Caroline St N, Waterloo, Ontario, N2L 2Y5, Canada", 
          "organization": "Perimeter Institute for Theoretical Physics"
        }
      ], 
      "surname": "Mart\u00edn-Mart\u00ednez", 
      "email": "emartinmartinez@uwaterloo.ca", 
      "full_name": "Mart\u00edn-Mart\u00ednez, Eduardo", 
      "given_names": "Eduardo"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "The time traveler\u2019s guide to the quantization of zero modes"
    }
  ], 
  "dois": [
    {
      "value": "10.1007/JHEP12(2021)170"
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  "publication_info": [
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      "page_end": "33", 
      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2021", 
      "artid": "JHEP12(2021)170", 
      "year": 2021, 
      "page_start": "1", 
      "journal_issue": "12"
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    "submission_number": "8aef394c664711ecbc4196e84b9c3210"
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  "page_nr": [
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  "license": [
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      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
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  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2021"
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  "control_number": "66816", 
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      "value": "2108.07274"
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  ], 
  "abstracts": [
    {
      "source": "Springer", 
      "value": "We study the relationship between the quantization of a massless scalar field on the two-dimensional Einstein cylinder and in a spacetime with a time machine. We find that the latter picks out a unique prescription for the state of the zero mode in the Einstein cylinder. We show how this choice arises from the computation of the vacuum Wightman function and the vacuum renormalized stress-energy tensor in the time-machine geometry. Finally, we relate the previously proposed regularization of the zero mode state as a squeezed state with the time-machine warp parameter, thus demonstrating that the quantization in the latter regularizes the quantization in an Einstein cylinder."
    }
  ], 
  "imprints": [
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      "date": "2021-12-23", 
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