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what is the difference between "ecut" and "ecutwfn" in GW?

From: Xiaohong Zheng <zheng@chips.ncsu.edu>
To: forum@abinit.org
Subject: what is the difference between "ecut" and "ecutwfn" in GW?
Date: Sun, 28 Oct 2007 23:10:33 -0400

Hello, every one,

what is the difference between "ecut" and "ecutwfn" in GW calculations? They
look like two cutoff energies of wave functions. What are the difference between them? Why do we
need two different sets of wave functions in the GW calculations?

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what is the difference between "ecut" and "ecutwfn" in GW?, Xiaohong Zheng, 10/29/2007
- Re: [abinit-forum] what is the difference between "ecut" and "ecutwfn" in GW?, Matteo Giantomassi, 10/29/2007
  - Re: [abinit-forum] what is the difference between "ecut" and "ecutwfn" in GW?, Xiaohong Zheng, 10/29/2007
    - Re: [abinit-forum] what is the difference between "ecut" and "ecutwfn" in GW?, Matteo Giantomassi, 10/29/2007
      - Re: [abinit-forum] what is the difference between "ecut" and "ecutwfn" in GW?, Xiaohong Zheng, 10/30/2007