Harvard University Department of Physics

Error message

Agenda: Bad call to list events. Check Google API Key or Calendar Address.

exception 'Google_Service_Exception' with message 'Error calling GET https://www.googleapis.com/calendar/v3/calendars/iitamp.si.hu%40gmail.com/events?orderBy=startTime&singleEvents=true&timeMin=2017-06-25T00%3A00%3A00-04%3A00&timeMax=2017-07-25T00%3A00%3A00-04%3A00&maxResults=10&timeZone=America%2FNew_York&key=AIzaSyCDxb1iD3czvVjvnoz0N6-VvQ2GOjY2BbI: (404) Not Found' in /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php:83
Stack trace:
#0 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php(41): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client))
#1 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Client.php(564): Google_Http_REST::execute(Object(Google_Client), Object(Google_Http_Request))
#2 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Service/Resource.php(227): Google_Client->execute(Object(Google_Http_Request))
#3 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Service/Calendar.php(1561): Google_Service_Resource->call('list', Array, 'Google_Service_...')
#4 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(498): Google_Service_Calendar_Events_Resource->listEvents('iitamp.si.hu@gm...', Array)
#5 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(316): _agenda_load_google('iitamp.si.hu@gm...', 'public', Object(stdClass))
#6 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(213): agenda_get_events(Object(stdClass))
#7 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(160): agenda_display_block('3')
#8 [internal function]: agenda_block_view('3')
#9 /usr/share/drupal7/includes/module.inc(799): call_user_func_array('agenda_block_vi...', Array)
#10 /usr/share/drupal7/modules/block/block.module(854): module_invoke('agenda', 'block_view', '3')
#11 /usr/share/drupal7/modules/block/block.module(674): _block_render_blocks(Array)
#12 /usr/share/drupal7/modules/block/block.module(318): block_list('sidebar_second')
#13 /usr/share/drupal7/modules/block/block.module(268): block_get_blocks_by_region('sidebar_second')
#14 /usr/share/drupal7/includes/common.inc(5643): block_page_build(Array)
#15 /usr/share/drupal7/includes/common.inc(2606): drupal_render_page('

Agenda: Bad call to list events. Check Google API Key or Calendar Address.

exception 'Google_Service_Exception' with message 'Error calling GET https://www.googleapis.com/calendar/v3/calendars/230tsk6c9dtlc4592urh65cql8%40group.calendar.google.com/events?orderBy=startTime&singleEvents=true&timeMin=2017-06-25T00%3A00%3A00-04%3A00&timeMax=2017-07-25T00%3A00%3A00-04%3A00&maxResults=10&timeZone=America%2FNew_York&key=AIzaSyCDxb1iD3czvVjvnoz0N6-VvQ2GOjY2BbI: (404) Not Found' in /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php:83
Stack trace:
#0 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php(41): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client))
#1 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Client.php(564): Google_Http_REST::execute(Object(Google_Client), Object(Google_Http_Request))
#2 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Service/Resource.php(227): Google_Client->execute(Object(Google_Http_Request))
#3 /etc/drupal/7/sites/all/libraries/google-api-php-client/src/Google/Service/Calendar.php(1561): Google_Service_Resource->call('list', Array, 'Google_Service_...')
#4 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(498): Google_Service_Calendar_Events_Resource->listEvents('230tsk6c9dtlc45...', Array)
#5 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(316): _agenda_load_google('230tsk6c9dtlc45...', 'public', Object(stdClass))
#6 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(213): agenda_get_events(Object(stdClass))
#7 /etc/drupal/7/sites/web.physics.harvard.edu/modules/agenda/agenda.module(160): agenda_display_block('3')
#8 [internal function]: agenda_block_view('3')
#9 /usr/share/drupal7/includes/module.inc(799): call_user_func_array('agenda_block_vi...', Array)
#10 /usr/share/drupal7/modules/block/block.module(854): module_invoke('agenda', 'block_view', '3')
#11 /usr/share/drupal7/modules/block/block.module(674): _block_render_blocks(Array)
#12 /usr/share/drupal7/modules/block/block.module(318): block_list('sidebar_second')
#13 /usr/share/drupal7/modules/block/block.module(268): block_get_blocks_by_region('sidebar_second')
#14 /usr/share/drupal7/includes/common.inc(5643): block_page_build(Array)
#15 /usr/share/drupal7/includes/common.inc(2606): drupal_render_page('
  

      
  
    
        
  
  
      
        
      
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UPCOMING EVENTS

Tuesday, June 27th

CMP Special Seminar: Andrea Young (UCSB), hosted by Philip Kim
Start: 02:00pm - End: 03:00pm
- 02:00pm
- Title: New Fractional quantum Hall states in graphene heterostructures
  
  Abstract: I will discuss magnetocapacitance experiments from a new generation of ultra-clean graphene heterostructures, realized by replacing conventional gate metallization with single crystal graphite flakes. In the first part of the talk, I will discuss bilayer graphene as a platform for exploring the half-filled Landau level (LL), focusing on the observation of robust, single component even-denominator fractional quantum Hall states at filling ν=-5/2, -1/2, 3/2, and 7/2. Numerical simulations of the blayer graphene ZLL suggest this state is in the Pfaffian phase, consistent with the experimentally observation of a 7/13 and weak 8/17 incompressible state—predicted Pfaffian ‘daughter’ states. Unlike in conventional systems, magnetic field directly changes the single particle wavefunction, tuning the mixture of lowest and first LL amplitudes within a single component level. We observe this pseudopotential tuning as rise and subsequent near-collapse of the ½ gap at high field, indicating the presence of a nearby Pfaffian-composite fermi liquid transition. A similar transition can be tuned by engineering a level crossing between N=0 and N=1 LLs in different valleys. Here, we find that the Pfaffian-CFL transition is mediated by an unexpected gapped phase, characterized by large valley imbalance but a persistent charge gap.
  
  In the second part of the talk, I will describe the effects of a superlattice on the nature of the fractional quantum Hall effect. At high magnetic field in devices where the graphene is aligned with one or both adjacent hBN crystals, a substrate-induced moiré superlattice gives rise to a variety of Hofstadter bands with Chern numbers . Trajectories of energy gaps in the density () magnetic flux () plane follow linear trajectories parameterized by integers and , Contrary to single particle theory—which predicts a fractal band structure, with each band subdivided into a recursive hierarchy of minibands—we find robust incompressible states at fractional filling of these Chern bands, characterized by fractional and/or fractional . Basic arguments, supplemented by numerical DMRG calculations, support two kinds of correlated states: states with integer and fractional break lattice symmetry, while states with both fractional and fractional do not break lattice symmetry. These latter, known as fractional Chern insulators, constitute a fractional quantum Hall effect ‘without Landau levels.’
- View in Google Calendar

Wednesday, June 28th

Prof. Mathias Kolle - MIT
Start: 05:30pm - End: 07:00pm
- 05:30pm
- View in Google Calendar