[QE-users] Linewidths

[Lorenzo Paulatto]

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 <users-bounces at lists.quantum-espresso.org> on behalf of 
> Lorenzo Paulatto <lorenzo.paulatto at cnrs.fr>
> *Sent:* Tuesday, August 19, 2025 2:25:48 AM
> *To:* users at lists.quantum-espresso.org <users at lists.quantum-espresso.org>
> *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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> -- 
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Dr. Lorenzo Paulatto
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phone: +33 (0)1 442 79822 / telegram: lpaulatto
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