    2000 fs simulation
     &cntrl
      imin=0,
      ntx=1,irest=0,
      ntpr=50,ntwr=50,ntwx=100,
      ntc=2,ntf=2,ntb=1,cut=10,
      igb=0,
      ntr=0,
      nstlim=2000,dt=0.001,nscm=5000,nrespa=1,
      ntt=3,gamma_ln=1,tempi=300,temp0=300,ig=233,
      ntp=0,taup=2.0,pres0=1,
      icfe=1,klambda=6,clambda=0.5
     /
