Probing quantum coherent states in bilayer graphene

Matthew J. Gilbert, John Shumway

Research output: Contribution to journalArticlepeer-review


An active area of post-CMOS device research is to study the possibility of realizing and exploiting exotic quantum states in nanostructures. In this paper we consider one such system, two layers of graphene separated by an oxide insulator. This system has been predicted to have an excitonic condensate that survives above room temperature. We describe a computational technique - path integral quantum Monte Carlo (PIMC) - that directly simulates many-body quantum phenomena, including excitonic condensation. Starting from a simplified quasiparticle model, the many-body PIMC simulations show excitonic pairing and a confirm a superfluid phase that persists above room temperature. We then present an atomistic PIMC model that captures more details of graphene than our quasiparticle model, and discuss how to extract parameters for a non-equilibrium Green's function calculation.

Original languageEnglish (US)
Pages (from-to)51-59
Number of pages9
JournalJournal of Computational Electronics
Issue number2
StatePublished - 2009


  • Exciton condensate
  • Graphene
  • Path integral
  • Quantum Monte Carlo
  • Superfluidity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • Electrical and Electronic Engineering


Dive into the research topics of 'Probing quantum coherent states in bilayer graphene'. Together they form a unique fingerprint.

Cite this