restart RT-TDDFT


Just Got Here
Hello,

After running a simple RT-TDDFT simulation I am not able to continue the dynamics using the restart command. The idea is to use the restart command to extend the simulation time. Here I present a minimal example of the problem.

This is my first input file:

title "Water TD-PBE0 absorption spectrum"
echo

start water

geometry "system" units angstroms nocenter noautoz noautosym
  O     0.00000000    -0.00001441    -0.34824012
  H    -0.00000000     0.76001092    -0.93285191
  H     0.00000000    -0.75999650    -0.93290797
end

set geometry "system"

basis
 * library 6-31G
end

dft
 xc pbe0
end

task dft energy

unset rt_tddft:*
rt_tddft
  tmax 3.0
  dt 0.2

  tag "kick_x"
  nchecks *
  nrestarts * 
  print * 

  field "kick"
    type delta
    polarization x
    max 0.0001
  end

  excite "system" with "kick"
 end
task dft rt_tddft


After running this file the water.db and water.movecs and water.rt_restart are created in the working directory. Then I run the following input file:

title "Water TD-PBE0 absorption spectrum"
echo
restart water

rt_tddft
  tmax 10.0
  dt 0.2

  tag "kick_x2"
  nchecks *
  nrestarts * 
  print * 
end

task dft rt_tddft


However, inspecting the output (eg dipole moment) it seems that the dynamics do not continue but instead it starts again from the beginning (but without the kick).

I appreciate any help. Thank you.

Forum Regular
Hi,

Basically, for the restart phase, add a load restart in the rt block

rt_tddft
load restart
tmax 10.0
dt 0.2
tag "kick_x2"
nchecks *
nrestarts *
print *
end

Please try this and let me know. Thanks for reporting this. We will document this better.

Best,
-Niri
niri.govind@pnnl.gov

Clicked A Few Times
how must be command run ?
before destroy run:
nwchem input >> out
after break the run and for restart the job in the same foder with existed files:
again I have to type "nwchem input >> out" for loading the out information?


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