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<title>Ian Affleck</title>

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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Ian Affleck</span></h1>

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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="de" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="de" dir="ltr"><p><b>Ian Affleck</b> (* <a href="2._Juli" title="2. Juli">2. Juli</a> <a href="1952" title="1952">1952</a> in <a href="Vancouver" title="Vancouver">Vancouver</a>; † <a href="4._Oktober" title="4. Oktober">4. Oktober</a> <a href="2024" title="2024">2024</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>) war ein kanadischer theoretischer <a href="Physiker" title="Physiker">Physiker</a>.

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<div class="mw-heading mw-heading2"><h2 id="Leben_und_Werk">Leben und Werk</h2></div>

<p>Affleck studierte an der <a href="Trent_University" title="Trent University">Trent University</a> in <a href="Peterborough_(Ontario)" title="Peterborough (Ontario)">Peterborough (Ontario)</a> (<a href="Bachelor" title="Bachelor">Bachelor</a>-Abschluss 1975) und der <a href="Harvard_University" title="Harvard University">Harvard University</a>, wo er 1976 seinen <a href="Master" title="Master">Master</a>-Abschluss machte und 1979 bei <a href="Sidney_Coleman" title="Sidney Coleman">Sidney Coleman</a> <a href="Promotion_(Doktor)" title="Promotion (Doktor)">promoviert</a> wurde. 1979 bis 1981 war er Junior Fellow in Harvard. 1981 bis 1987 war er Assistant Professor an der <a href="Princeton_University" title="Princeton University">Princeton University</a>, unterbrochen von einem Aufenthalt am Kernforschungszentrum in <a href="Saclay" title="Saclay">Saclay</a> 1984/85. Er war ab 1987 Professor an der <a href="University_of_British_Columbia" title="University of British Columbia">University of British Columbia</a>.

</p><p>Affleck begann Anfang der 1980er Jahre mit Arbeiten in der <a href="Teilchenphysik" title="Teilchenphysik">Elementarteilchenphysik</a> und <a href="Quantenfeldtheorie" title="Quantenfeldtheorie">Quantenfeldtheorie</a>, zum Beispiel untersuchte er die Rolle von <a href="Instanton" title="Instanton">Instantonen</a> in verschiedenen Quantenfeldtheorien. Mit <a href="Michael_Dine" title="Michael Dine">Michael Dine</a> und anderen schrieb er frühe Arbeiten über dynamischen Bruch der <a href="Supersymmetrie" title="Supersymmetrie">Supersymmetrie</a> und entwickelte den Affleck-Dine-Mechanismus zur <a href="Baryogenese" title="Baryogenese">Baryogenese</a>. Später wandte er sich der <a href="Festk%C3%B6rperphysik" title="Festkörperphysik">Festkörperphysik</a> zu, wo er quantenfeldtheoretische Methoden aus der Elementarteilchenphysik anwandte, wie zum Beispiel <a href="Konforme_Feldtheorie" title="Konforme Feldtheorie">konforme Feldtheorien</a>, das Konzept der lokalen <a href="Eichtheorie" title="Eichtheorie">Eichinvarianz</a> oder nichtabelsche <a href="Boson" title="Boson">Bosonisierung</a>. In der Festkörperphysik beschäftigte er sich mit <a href="Hochtemperatursupraleiter" title="Hochtemperatursupraleiter">Hochtemperatursupraleitern</a>, niedrigdimensionalen magnetischen Systemen (wie quasi-eindimensionale <a href="Antiferromagnet" class="mw-redirect" title="Antiferromagnet">Antiferromagneten</a><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>) und magnetischen Störstellen in Metallen (<a href="Kondo-Effekt" title="Kondo-Effekt">Kondo-Modell</a>)<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> sowie mit Randbedingungen verbundener kritischer Phänomene.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

</p><p>Von 1983 bis 1987 war er <a href="Sloan_Research_Fellowship" title="Sloan Research Fellowship">Sloan Research Fellow</a>. 1988 erhielt er den Steacie-Preis, 1990 die Hertzberg-Medaille, 1991 die <a href="Rutherford_Medal" class="mw-redirect" title="Rutherford Medal">Rutherford Medal</a>, 1992 den <span lang="en"><i>Killam Prize</i></span> und den <span lang="en"><i>Jacob Biely Prize</i></span> und 2012 den <a href="Lars-Onsager-Preis" title="Lars-Onsager-Preis">Lars-Onsager-Preis</a>. Er war Fellow der <a href="Royal_Society_of_Canada" title="Royal Society of Canada">Royal Society of Canada</a> und wurde 2002 Fellow der <a href="American_Physical_Society" title="American Physical Society">American Physical Society</a> sowie 2010 der <a href="Royal_Society" title="Royal Society">Royal Society</a> und 2016 Mitglied der <a href="Acad%C3%A9mie_des_sciences" title="Académie des sciences">Académie des sciences</a>.

</p><p>In der Laudatio für die Wahl in die Royal Society wurden seine <i>zahlreichen wegweisenden Beiträge über einen breiten Bereich der theoretischen Physik</i> hervorgehoben.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Schriften">Schriften</h2></div>

<ul><li><i>Field Theory Methods and Quantum Critical Phenomena.</i> In: Zinn-Justin Brezin (Herausgeber): <i>Fields, Strings and Critical Phenomena.</i> Les Houches Lectures, North Holland 1990, S. 563–640.</li></ul>

<div class="mw-heading mw-heading2"><h2 id="Weblinks">Weblinks</h2></div>

<ul><li><a rel="nofollow" class="external text" href="http://www.phas.ubc.ca/~iaffleck/">Homepage</a></li>

<li><a rel="nofollow" class="external text" href="http://axion.physics.ubc.ca/theory/affleck.html">Weitere Homepage in biographischen Angaben</a></li>

<li><a rel="nofollow" class="external text" href="http://www.science.ca/scientists/scientistprofile.php?pID=24&pg=3">Affleck, CV</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>

<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="cite"><a rel="nofollow" class="external text" href="https://phas.ubc.ca/memoriam-ian-affleck-1952-2024"><i>In Memoriam: Ian Affleck (1952-2024).</i></a> In: <i>ubc.ca.</i> 8. Oktober 2024,<span class="Abrufdatum"> abgerufen am 9. Oktober 2024</span> (englisch).</span><span style="display: none;" class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2Fde.wikipedia.org%3AIan+Affleck&rft.title=In+Memoriam%3A+Ian+Affleck+%281952-2024%29&rft.description=In+Memoriam%3A+Ian+Affleck+%281952-2024%29&rft.identifier=https%3A%2F%2Fphas.ubc.ca%2Fmemoriam-ian-affleck-1952-2024&rft.date=2024-10-08&rft.language=en"> </span></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">Ian Affleck: <cite style="font-style:italic">Bose condensation in quasi-one-dimensional antiferromagnets in strong fields</cite>. In: <cite style="font-style:italic">Physical Review B</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>43</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>4</span>, 1. Februar 1991, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>3215–3222</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1103/PhysRevB.43.3215">10.1103/PhysRevB.43.3215</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Bose+condensation+in+quasi-one-dimensional+antiferromagnets+in+strong+fields&rft.au=Ian+Affleck&rft.date=1991-02-01&rft.doi=10.1103%2FPhysRevB.43.3215&rft.genre=journal&rft.issue=4&rft.jtitle=Physical+Review+B&rft.pages=3215-3222&rft.volume=43" style="display:none"> </span></span>

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<li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Ian Affleck, Greg F. Wellman: <cite style="font-style:italic">Longitudinal modes in quasi-one-dimensional antiferromagnets</cite>. In: <cite style="font-style:italic">Physical Review B</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>46</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>14</span>, 1. Oktober 1992, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>8934–8953</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1103/PhysRevB.46.8934">10.1103/PhysRevB.46.8934</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Longitudinal+modes+in+quasi-one-dimensional+antiferromagnets&rft.au=Ian+Affleck%2C+Greg+F.+Wellman&rft.date=1992-10-01&rft.doi=10.1103%2FPhysRevB.46.8934&rft.genre=journal&rft.issue=14&rft.jtitle=Physical+Review+B&rft.pages=8934-8953&rft.volume=46" style="display:none"> </span></span>

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<li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">I Affleck: <cite style="font-style:italic">Quantum spin chains and the Haldane gap</cite>. In: <cite style="font-style:italic">Journal of Physics: Condensed Matter</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>1</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>19</span>, 15. Mai 1989, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>3047–3072</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1088/0953-8984%2F1%2F19%2F001">10.1088/0953-8984/1/19/001</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Quantum+spin+chains+and+the+Haldane+gap&rft.au=I+Affleck&rft.date=1989-05-15&rft.doi=10.1088%2F0953-8984%2F1%2F19%2F001&rft.genre=journal&rft.issue=19&rft.jtitle=Journal+of+Physics%3A+Condensed+Matter&rft.pages=3047-3072&rft.volume=1" style="display:none"> </span></span>

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<li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text">Ian Affleck, Andreas W.W. Ludwig: <cite style="font-style:italic">Critical theory of overscreened Kondo fixed points</cite>. In: <cite style="font-style:italic">Nuclear Physics B</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>360</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>2–3</span>, 19. August 1991, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>641–696</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1016/0550-3213%2891%2990419-X">10.1016/0550-3213(91)90419-X</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Critical+theory+of+overscreened+Kondo+fixed+points&rft.au=Ian+Affleck%2C+Andreas+W.W.+Ludwig&rft.date=1991-08-19&rft.doi=10.1016%2F0550-3213%2891%2990419-X&rft.genre=journal&rft.issue=2-3&rft.jtitle=Nuclear+Physics+B&rft.pages=641-696&rft.volume=360" style="display:none"> </span></span>

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<li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text">Ian Affleck, Andreas W. W. Ludwig: <cite style="font-style:italic">Exact critical theory of the two-impurity Kondo model</cite>. In: <cite style="font-style:italic">Physical Review Letters</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>68</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>7</span>, 17. Februar 1992, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>1046–1049</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1103/PhysRevLett.68.1046">10.1103/PhysRevLett.68.1046</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Exact+critical+theory+of+the+two-impurity+Kondo+model&rft.au=Ian+Affleck%2C+Andreas+W.+W.+Ludwig&rft.date=1992-02-17&rft.doi=10.1103%2FPhysRevLett.68.1046&rft.genre=journal&rft.issue=7&rft.jtitle=Physical+Review+Letters&rft.pages=1046-1049&rft.volume=68" style="display:none"> </span></span>

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<li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text">Ian Affleck, Andreas W. W. Ludwig: <cite style="font-style:italic">Universal noninteger “ground-state degeneracy” in critical quantum systems</cite>. In: <cite style="font-style:italic">Physical Review Letters</cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>67</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>2</span>, 8. Juli 1991, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>161–164</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1103/PhysRevLett.67.161">10.1103/PhysRevLett.67.161</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Ian+Affleck&rft.atitle=Universal+noninteger+%E2%80%9Cground-state+degeneracy%E2%80%9D+in+critical+quantum+systems&rft.au=Ian+Affleck%2C+Andreas+W.+W.+Ludwig&rft.date=1991-07-08&rft.doi=10.1103%2FPhysRevLett.67.161&rft.genre=journal&rft.issue=2&rft.jtitle=Physical+Review+Letters&rft.pages=161-164&rft.volume=67" style="display:none"> </span></span>

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<li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">↑</a></span> <span class="reference-text"><i>Ian Affleck has made numerous ground-breaking contributions across a wide range of theoretical physics.</i>, <a rel="nofollow" class="external text" href="http://www.physics.ubc.ca/News/">Zitat aus der Laudatio</a></span>

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Normdaten (Person): <a href="Gemeinsame_Normdatei" title="Gemeinsame Normdatei">GND</a>: <span class="-print"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/142828343">142828343</a></span> | <a href="Virtual_International_Authority_File" title="Virtual International Authority File">VIAF</a>: <span class="-print"><a rel="nofollow" class="external text" href="https://viaf.org/viaf/160271672/">160271672</a></span> | </div>

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