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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Tunable multiple layered Dirac cones in optical lattices.

Z Lan1, A Celi, W Lu

  • 1SUPA, Department of Physics, Heriot-Watt University, EH14 4AS, Edinburgh, United Kingdom.

Physical Review Letters
|January 17, 2012
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate multiple layered Dirac cones in cold fermionic gases. This allows tuning of fermion properties and simulation of fundamental physics phenomena like neutrino oscillations.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Simulation
  • Atomic Physics

Background:

  • Dirac cones are fundamental to understanding massless fermions in condensed matter.
  • Cold atomic gases in optical lattices provide a versatile platform for simulating quantum phenomena.

Purpose of the Study:

  • To investigate the emergence of multiple layered Dirac cones in multicomponent cold fermionic gases.
  • To explore the tunability of these Dirac cones and their constituent Dirac fermions.
  • To demonstrate the potential for simulating fundamental physics phenomena.

Main Methods:

  • Utilizing multicomponent cold fermionic gases in optical lattices.
  • Engineering the band structure to create layered Dirac cones.
  • Applying on-site microwave Raman transitions to mix Dirac species.

Main Results:

  • Successfully generated multiple layered Dirac cones with tunable Fermi velocities.
  • Demonstrated control over Dirac species mixing, leading to Dirac point splitting or preservation.
  • Showcased the ability to simulate neutrino oscillations and exotic particle dispersions (E~p(N)).

Conclusions:

  • Multiple layered Dirac cones are achievable in engineered cold atom systems.
  • These systems offer a tunable platform for exploring relativistic quantum mechanics and fundamental physics.
  • The findings pave the way for novel quantum simulations of particle physics phenomena.