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Department News and Colloquium

Physics & Astronomy Colloquium at CSU Long Beach


Large Graphs in Physics: From Statistical Mechanics of Networks to Quantum Cosmology

Dmitri Krioukov,
University of California San Diego

Monday April 28, 2014
11:15am, PH2-110

(Refreshments served at 10:45 am, HSCI-224)

Fig: Hyperbolic geometry is the hidden geometry of complex networks.

Graphs are useful abstractions of complex systems consisting of distinguishable elements (nodes) and their interactions (edges). Examples include the Internet, social networks, brain, and quantum networks representing the large-scale structure of space- time in our accelerating universe. The semantics of nodes and edges in graphs representing these completely different complex systems is completely different. However, the large-scale structure of these graphs is remarkably similar. This similarity has been recently explained as a consequence of the unexpected dynamical equivalence between large-scale growth dynamics of these graphs. This suggests that some unknown fundamental laws govern the dynamics of complex systems as different as the brain, the Internet, and the universe. I will review the basic concepts behind graphs and networks, describing the examples of real networks mentioned above. I will show that random geometric graphs in some non-Euclidean spaces accurately model the structure and dynamics of real networks, ranging from the Internet to our Universe.

See the colloquium schedule and its archive of previous talks

Time and Place

Colloquia are scheduled to start Mondays at 11:15am sharp in Peterson Hall 2, Room 110 (PH2-110, map). Refreshments are served from 10:45am to 11:05am in Room HSCI-224 (next to the department office) and everyone is invited to mingle with faculty and students!


For information and suggestions about the colloquium please contact the colloquium coordinator:
Prof. Prashanth Jaikumar, Phone: 562-985-5592, Email: pjaikuma@csulb.edu

Directions to Campus

  • Access to Campus
  • Campus Maps
  • Parking on campus: contact the coordinator of the colloquium. If not reachable, call the department office (562) 985-7925. If none of these are available at the time you need information, call (562) 985-4146 or go to the drive-through information booth at the main campus entrance (on Beach Drive, near the crossing to Bellflower).
  • Walk (or ask for a ride on an on-campus shuttle) to the department office: Hall of Sciences, Room 220 (HSCI-220). The coordinator will provide the necessary informations.
  • Any question or problem: call the colloquium coordinator or the department office (562) 985-7925.

Colloquia Sponsors:

We acknowledge with gratitude donations and support from the following present sponsors:

  • H.E. and H.B. Miller
  • Benjamin Carter
  • The American Physical Society
  • Anonymous

We also acknowledge with gratitude our past donors: The Forty-Niner Shops, Inc., The Northrop Grumman Foundation, Sandra Dana, Anonymous.

If you wish to support the Colloquium, please contact the colloquium coordinator or the department chair. Thank you!

Academic Year 2013-2014

Date Title Speaker and Affiliation
January 27 Laser Eye Surgery: Applied Physics at its Finest F. Raksi
February 3 Computational Approach to Undergraduate Physics Laboratory Zoltan Papp, CSULB
February 10 Superconducting States in pseudo-Landau levels of Strained Graphene Yafis Barlas, UCR
February 17 Heating up the Vacuum: a new Spin on QCD at RHIC Kenneth R. Barish, UCR
February 24 My Favorite Elementary Particle: The Neutrino James Hill, CSUDH
March 3 Space Situational Awareness: Providing advanced, innovative space surveillance technologies to the warfighter Kenneth A. Abeloe
Integrity Applications Incorporated
March 10 Nonlinear dynamics and phase transitions in heart cells Y. Shiferaw, CUN
March 17 Quantum Transport and Correlated Phenomena in Bilayer and Trilayer Graphene Membranes J. Lau, UCR
March 24 Effective Field Theory A. Manohar, UCSD
April 7 Engineering Light Matter Interactions with Colloidal Systems Regina Ragan, UCR
April 14 X-ray and Infrared Observational Studies of Star Formation Across the Milky Way Matthew Povich, CSPUP
April 21 Planet Formation Revealed by High-Contrast Imaging Michael Fitzgerald, UCLA
April 28 Large Graphs in Physics: From Statistical Mechanics of Networks to Quantum Cosmology Dmitri Krioukov, USCD

Colloquia Schedule

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