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  <doc>
    <id>881</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2005-11-24</completedDate>
    <publishedDate>2005-11-24</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Probing the Aoki phase with N_f=2 Wilson fermions at finite temperature</title>
    <abstract language="eng">In this letter we report on a numerical investigation of the Aoki phase in the case of finite temperature which continues our former study at zero temperature. We have performed simulations with Wilson fermions at $\beta=4.6$ using lattices with temporal extension $N_{\tau}=4$. In contrast to the zero temperature case, the existence of an Aoki phase can be confirmed for a small range in $\kappa$ at $\beta=4.6$, however, shifted slightly to lower $\kappa$. Despite fine-tuning $\kappa$ we could not separate the thermal transition line from the Aoki phase.</abstract>
    <identifier type="serial">05-48</identifier>
    <identifier type="opus3-id">881</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-8812</identifier>
    <author>Ernst-Michael Ilgenfritz</author>
    <author>Werner Kerler</author>
    <author>Michael Müller-Preussker</author>
    <author>Andre Sternbeck</author>
    <author>Hinnerk Stüben</author>
    <series>
      <title>ZIB-Report</title>
      <number>05-48</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Wilson fermions</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>phase diagram</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>parity-flavor symmetry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Aoki phase</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>finite temperature</value>
    </subject>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="pacs" number="11.15.Ha">Lattice gauge theory (see also 12.38.Gc Lattice QCD calculations)</collection>
    <collection role="pacs" number="12.38.Gc">Lattice QCD calculations (see also 11.15.Ha Lattice gauge theory)</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/881/ZR-05-48.pdf</file>
    <file>https://opus4.kobv.de/opus4-zib/files/881/ZR-05-48.ps</file>
  </doc>
  <doc>
    <id>593</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2000-07-25</completedDate>
    <publishedDate>2000-07-25</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Parallel tempering and decorrelation of topological charge in full QCD</title>
    <abstract language="eng">The improvement of simulations of QCD with dynamical Wilson fermions by combining the Hybrid Monte Carlo algorithm with parallel tempering is studied on $10^4$ and $12^4$ lattices. As an indicator for decorrelation the topological charge is used.</abstract>
    <identifier type="serial">00-25</identifier>
    <identifier type="opus3-id">594</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-5930</identifier>
    <enrichment key="SourceTitle">A completely revised version appeared as ZR 01-33 and in: Phys. Rev. D 65 (2002) 094506</enrichment>
    <author>Ernst-Michael Ilgenfritz</author>
    <author>Werner Kerler</author>
    <author>Michael Müller-Preussker</author>
    <author>Hinnerk Stüben</author>
    <series>
      <title>ZIB-Report</title>
      <number>00-25</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>QCD</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>parallel tempering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>topological charge</value>
    </subject>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="pacs" number="11.15.Ha">Lattice gauge theory (see also 12.38.Gc Lattice QCD calculations)</collection>
    <collection role="pacs" number="12.38.Gc">Lattice QCD calculations (see also 11.15.Ha Lattice gauge theory)</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/593/ZR-00-25.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/593/ZR-00-25.pdf</file>
  </doc>
  <doc>
    <id>659</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2001-11-16</completedDate>
    <publishedDate>2001-11-16</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Parallel tempering in full QCD with Wilson fermions</title>
    <abstract language="eng">We study the performance of QCD simulations with dynamical Wilson fermions by combining the Hybrid Monte Carlo algorithm with parallel tempering on $10^4$ and $12^4$ lattices. In order to compare tempered with standard simulations, covariance matrices between sub-ensembles have to be formulated and evaluated using the general properties of autocorrelations of the parallel tempering algorithm. We find that rendering the hopping parameter $\kappa$ dynamical does not lead to an essential improvement. We point out possible reasons for this observation and discuss more suitable ways of applying parallel tempering to QCD.</abstract>
    <identifier type="serial">01-33</identifier>
    <identifier type="opus3-id">660</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-6593</identifier>
    <enrichment key="SourceTitle">Appeared in: Phys. Rev. D 65 (2002) 094506</enrichment>
    <author>Ernst-Michael Ilgenfritz</author>
    <author>Werner Kerler</author>
    <author>Michael Müller-Preussker</author>
    <author>Hinnerk Stüben</author>
    <series>
      <title>ZIB-Report</title>
      <number>01-33</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>QCD</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>parallel tempering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>correlation analysis</value>
    </subject>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="pacs" number="11.15.Ha">Lattice gauge theory (see also 12.38.Gc Lattice QCD calculations)</collection>
    <collection role="pacs" number="12.38.Gc">Lattice QCD calculations (see also 11.15.Ha Lattice gauge theory)</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/659/ZR_01_33.orig.Vers.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/659/ZR-01-33.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/659/ZR-01-33.pdf</file>
  </doc>
</export-example>
