<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I don’t really know the tebd code, but the mps_evolve has the same features and it is definitely able to conserve quantum numbers as well as running other models.<div class=""><a href="https://alps.comp-phys.org/mediawiki/index.php/ALPS_2_Tutorials:_MPS-05_bhquench" class="">https://alps.comp-phys.org/mediawiki/index.php/ALPS_2_Tutorials:_MPS-05_bhquench</a></div><div class=""><br class=""></div><div class="">We never really rewrote the text of the tutorial, but in the installation directory you will find a script that runs the bhquench example, as well as others.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Best,<br class=""><div class="">
<span class="Apple-style-span" style="border-collapse: separate; font-variant-ligatures: normal; font-variant-east-asian: normal; font-variant-position: normal; line-height: normal; border-spacing: 0px;"><div class="">Michele</div><div class=""><br class=""></div></span><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On 27 Aug 2017, at 16:52, Sun Rongyang <<a href="mailto:sun-rongyang@outlook.com" class="">sun-rongyang@outlook.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" dir="ltr" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear ALPS users,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">When I follow the ALPS TEBD tutorial about hard-core boson model(<a href="http://alps.comp-phys.org/mediawiki/index.php/ALPS_2_Tutorials:TEBD-01_bhquench" class="OWAAutoLink" id="LPlnk305156" previewremoved="true">http://alps.comp-phys.org/mediawiki/index.php/ALPS_2_Tutorials:TEBD-01_bhquench</a>) by Python, I measured the average particle number for each site, i.e. 'Avg Number' except the<span class="Apple-converted-space"> </span><span style="font-size: 12pt;" class="">'Loschmidt Echo' and 'V' by the following python code:</span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-size: 12pt;" class=""><br class=""></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">data = pyalps.load.loadTimeEvolution(pyalps.getResultFiles(prefix='1D_HardcoreBosonModel'), measurements=['Loschmidt Echo', 'V', 'Avg Number'])<span style="font-size: 12pt;" class=""><br class=""></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Then I found the <span style="font-size: 12pt;" class="">'Avg Number' equals 0.3! This means that the total particle number is 0.3*10=3, not 5. In the tutorial, the conserved quantum number is 'N_total': 5. When I change the 'N_total' to 1 and 10, I got the same 'Avg Number'=0.3</span></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><span style="font-size: 12pt;" class=""><br class=""></span></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Can any one give me some help? Thanks a lot!</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Best regards,</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Rongyang Sun</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div id="Signature" class=""><div id="divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif, Helvetica, EmojiFont, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols, Helvetica, EmojiFont, 'Apple Color Emoji', 'Segoe UI Emoji', NotoColorEmoji, 'Segoe UI Symbol', 'Android Emoji', EmojiSymbols;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">-----------------------------------------------------------------</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Rongyang Sun</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Ph.D. Candidate</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Theoretical Quantum Matter Physics</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Institute for Advanced Study, Tsinghua University, Beijing 100084, China</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">E-mail:<span class="Apple-converted-space"> </span><a href="mailto:sunry15@mails.tsinghua.edu.cn" class="">sunry15@mails.tsinghua.edu.cn</a>;<span class="Apple-converted-space"> </span><a href="mailto:sun-rongyang@outlook.com" class="">sun-rongyang@outlook.com</a></div><p style="margin-top: 0px; margin-bottom: 0px;" class=""> </p><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div></div></div></div><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; 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