Synopsis: Cultivating Extra Dimensions

Ultracold atoms could be used to simulate physical phenomena beyond three spatial dimensions.
Synopsis figure
O. Boada et al., Phys. Rev. Lett. (2012)

The rapid development of ultracold atomic physics has catalyzed efforts to harness atoms for simulating other kinds of matter, such as exotic phases in condensed-matter physics, that may be inaccessible to experiments or difficult to crack theoretically. But condensed-matter physics is not the only arena for ultracold atom simulators: writing in Physical Review Letters, Octavi Boada at the University of Barcelona, Spain, and colleagues propose a way to simulate physics in extra dimensions, a topic dear to the hearts of those who toil in the vineyards of particle physics and quantum gravity.

The search for ways to unify and understand physical phenomena goes back to Kaluza and Klein, who in the 1920s tried to combine electromagnetism with gravity by adding a fourth spatial dimension to the usual three (plus time). More recent theoretical work has suggested that a theory of everything may need 11 spacetime dimensions. Boada et al. are suggesting an experimental strategy for investigating how matter behaves in extra dimensions. Their idea is to encode a fourth spatial dimension in an internal degree of freedom offered by atoms trapped in an optical lattice, and do it in such a way as to exactly reproduce the physics described by a 4D Hamiltonian. The authors show two ways of observing such effects: one is to look for single-particle effects, such as rates of decay of excited states as a function of dimensionality; another is to search for many-body effects such as insulator-to-superfluid transitions that depend on the number of dimensions. – David Voss


More Announcements »

Subject Areas

Atomic and Molecular PhysicsParticles and Fields

Previous Synopsis

Next Synopsis

Biological Physics

Group Mentality

Read More »

Related Articles

Viewpoint: Connecting the Higgs Mass with Cosmic History

Viewpoint: Connecting the Higgs Mass with Cosmic History

A theoretical proposal ties the puzzling light mass of the Higgs particle to a hypothetical new particle that plays an important role during the big bang. Read More »

Synopsis: LHC Data Might Reveal Nature of Neutrinos
Particles and Fields

Synopsis: LHC Data Might Reveal Nature of Neutrinos

A long-standing question over whether the neutrino is its own antiparticle might be answered by looking at decays of W bosons. Read More »

Viewpoint: Cool Physics with Warm Ions
Atomic and Molecular Physics

Viewpoint: Cool Physics with Warm Ions

Ultrafast laser pulses can be used to control and characterize the quantum motion of a single trapped ion over 5 orders of magnitude in temperature. Read More »

More Articles