A Plan for Hybrid Entanglement

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A Plan for HybridEntanglement
Christopher Monroe and Edo Waks

• Quantum entanglement, a condition in which the
  states of two different objects become so
  inextricably linked that neither can be described
  separately, is an essential element of any future
  quantum computer. Scientists have succeeded in
  entangling many sorts of entities, typically
  identical atom or photon systems. But it has
  never been accomplished between an atomic system
  and a solid-state system such as a quantum dot in
  a semiconductor microcavity.
• Now two researchers have devised an experiment in
  which the quantum state of a single trapped atom
  will be entangled with that of a quantum dot
  through the intervention of a laser beam that
  serves as an interface between the two. This is a
  difficult challenge, because each object radiates
  light of substantially different characteristics.
• Such a hybrid entanglement would be able to
  exploit the particular advantages of each
  component Atoms can sustain delicate quantum
  states for a very long time, whereas quantum dots
  can interact rapidly and strongly with light.

Protocol for Hybrid Entanglement Between a
Trapped Atom and a Semiconductor Quantum Dot,
Edo Waks and Christopher Monroe, Phys. Rev. A 80,
062330 (2009)