Thursday, March 4, 2010

Entanglement in quantum chemistry

Today I gave a talk at the weekly UQ Condensed Matter Theory group meeting (cake meeting because someone always brings a cake!) on the possible role of entanglement measures in quantum chemistry. I only got through the first half of these notes and so will continue next week.
Any comments welcome.


  1. Question: How is entanglement in molecules (in atomic bonds for example) protected against decoherence from the environment?

  2. Good question.
    The energy scale associated with the entanglement is the energy different between a singlet and a triplet state. Usually this is of order of an eV. This is much larger than the fluctuating energy scales associated with the environment.
    The down side is that this large energy scale means it is very difficult to manipulate and control the entanglement.