Hi Dr. Paulatto,

Thank you for your quick response, I will look into that module file and look 
at the equation.

Sincerely,
Roshan Sameer Annam
Co-Chair - Graduate Student Community (GSC)
Graduate Teaching and Research Assistant
Micro/Nano Heat Transfer Lab
School of Aerospace and Mechanical Engineering
University of Oklahoma
________________________________
From: users <[email protected]> on behalf of Lorenzo 
Paulatto <[email protected]>
Sent: Wednesday, August 20, 2025 10:38:13 AM
To: [email protected] <[email protected]>
Subject: Re: [QE-users] Linewidths

Thank you for letting me know, I've not reviewed the doc in a while, and those 
factors 1/2 are pesky. If you check the recompute_sam. m script in tool/ there 
is the equation explicitly written down in a relatively easy to understand 
form. On
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Thank you for letting me know, I've not reviewed the doc in a while, and those 
factors 1/2 are pesky. If you check the recompute_sam.m script in tool/ there 
is the equation explicitly written down in a relatively easy to understand form.

On 19/08/2025 18:55, Annam, Roshan Sameer wrote:
Hi,

Thank you for your quick response.

 I was going through thermals 2 documentation in the D3Q package folder, where 
under the d3_tk.x code documentation in the header where it describes output 
files, it says that the output file with lw_ will give full width half maximum 
line widths.

 So, I am still a little confused. Any clarification is greatly appreciated.

Sincerely,
Roshan Sameer Annam
Co-Chair - Graduate Student Community (GSC)
Graduate Teaching and Research Assistant
Micro/Nano Heat Transfer Lab
School of Aerospace and Mechanical Engineering
University of Oklahoma
________________________________
From: users 
<[email protected]><mailto:[email protected]>
 on behalf of Lorenzo Paulatto 
<[email protected]><mailto:[email protected]>
Sent: Tuesday, August 19, 2025 2:25:48 AM
To: [email protected]<mailto:[email protected]> 
<[email protected]><mailto:[email protected]>
Subject: Re: [QE-users] Linewidths

I was wondering if anyone can help me understand if the linewidths computed 
this way represents full width half maximums or half width half maximums. 
Hello, they are the imaginary part of the self energy, i. e. half-width 
half-maximum. The lifetime
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I was wondering if anyone can help me understand if the linewidths computed 
this way represents full width half maximums or half width half maximums.


Hello, they are the imaginary part of the self energy, i.e. half-width 
half-maximum. The lifetime is tau=1/(2 lw)

kind regards.


Your help is greatly appreciated.

Sincerely,
Roshan Sameer Annam
Co-Chair - Graduate Student Community (GSC)
Graduate Teaching and Research Assistant
Micro/Nano Heat Transfer Lab
School of Aerospace and Mechanical Engineering
University of Oklahoma



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IR IMPMC - CNRS UMR 7590 / Sorbonne Université / MNHN
phone: +33 (0)1 442 79822 / telegram: lpaulatto
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