ENCUTGWSOFT - Revision history

Kresse: document the change from squeezed Coulomb kernel to smoothed one for newer VASP versions.

2024-08-29T05:42:27Z

document the change from squeezed Coulomb kernel to smoothed one for newer VASP versions.

← Older revision		Revision as of 05:42, 29 August 2024
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	{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}		{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}
	{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}		{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}
	Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy		Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for the response function, such that it allows to truncate the Coulomb kernel slowly between the energy
	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.
	----		----
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	This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}.		This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}.
			For GW type calculations the squeezed Coulomb kernel was the default (when {{TAGBL\|ENCUTGWSOFT}} was set in the INCAR file) before version vasp.6.3, but
			in newer releases the code always defaults to a smoothed Coulomb kernel (both for GW and RPA type calculations). If one desires to recover the behavior
			of vasp.6.2 and older versions, {{TAG\|LSCK}}=.TRUE. must be set in the INCAR file for GW type calculations if {{TAGBL\|ENCUTGWSOFT}} is set in the INCAR file.


	{{NB\|mind\|The infinite basis set limit extrapolation for RPA/ACFDT is described in more detail [[ACFDT/RPA_calculations#Basis_set_convergence\|here]].}}		{{NB\|mind\|The infinite basis set limit extrapolation for RPA/ACFDT is described in more detail [[ACFDT/RPA_calculations#Basis_set_convergence\|here]].}}
	== Related tags and articles ==		== Related tags and articles ==

Kaltakm at 14:18, 24 April 2023

2023-04-24T14:18:28Z

← Older revision		Revision as of 14:18, 24 April 2023
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	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.
	----		----
			RPA/ACFDT correlation energies converge very slowly with respect to <math>\mathbf{G}_{\rm max }</math>.
			Thus VASP automatically extrapolates to the infinite basis set limit using a linear regression to the equation: {{cite\|harl:2008}}{{cite\|harl:2010}}{{cite\|klimes:2014}}

			<math>E_{\mathrm{c}}({\mathbf{G}})=E_{\mathrm{c}}(\infty)+\frac{A}{{\mathbf{G}}^3}</math>.

	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.
	The modified Coulomb kernel is in this case:		The modified Coulomb kernel is in this case:
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	\qquad \mbox{for} \quad \mathrm{ENCUTGWSOFT}=\frac{\hbar^2G_{min}^2}{2m_e}<\frac{\hbar^2 G^2}{2m_e}<\frac{\hbar^2G_{max}^2}{2m_e}=\mathrm{ENCUTGW}</math>		\qquad \mbox{for} \quad \mathrm{ENCUTGWSOFT}=\frac{\hbar^2G_{min}^2}{2m_e}<\frac{\hbar^2 G^2}{2m_e}<\frac{\hbar^2G_{max}^2}{2m_e}=\mathrm{ENCUTGW}</math>

	This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}. ~~Effectively, this extrapolates the RPA correlation energy to the~~ {{~~TAG~~\|~~ENCUTGW}} <math>\to \infty</math> limit, assuming that the~~ basis set ~~incompleteness error falls off as <math>1~~/~~\mathrm{ENCUTGW~~}~~^{3/2~~}~~</math>.~~		This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}.
			{{NB\|mind\|The infinite basis set limit extrapolation for RPA/ACFDT is described in more detail [[ACFDT/RPA_calculations#Basis_set_convergence\|here]].}}
	== Related tags and articles ==		== Related tags and articles ==
	{{TAG\|PRECFOCK}},		{{TAG\|PRECFOCK}},

Kaltakm: /* Related tags and articles */

2023-04-24T14:09:09Z

Kaltakm: /* Related tags and articles */

2023-04-24T14:08:55Z

Huebsch at 10:00, 19 July 2022

2022-07-19T10:00:33Z

← Older revision		Revision as of 10:00, 19 July 2022
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	----		----

	[[Category:INCAR tag]][[Category:Many-~~Body Perturbation Theory~~]][[Category:GW]]		[[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:GW]]

Karsai at 14:13, 8 April 2022

2022-04-08T14:13:17Z

← Older revision		Revision as of 14:13, 8 April 2022
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	This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}. Effectively, this extrapolates the RPA correlation energy to the {{TAG\|ENCUTGW}} <math>\to \infty</math> limit, assuming that the basis set incompleteness error falls off as <math>1/\mathrm{ENCUTGW}^{3/2}</math>.		This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}. Effectively, this extrapolates the RPA correlation energy to the {{TAG\|ENCUTGW}} <math>\to \infty</math> limit, assuming that the basis set incompleteness error falls off as <math>1/\mathrm{ENCUTGW}^{3/2}</math>.
	== Related ~~Tags~~ and ~~Sections~~ ==		== Related tags and articles ==
	{{TAG\|PRECFOCK}},		{{TAG\|PRECFOCK}},
	{{TAG\|ENCUT}},		{{TAG\|ENCUT}},
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	{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}		{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}
	----		----
	~~[[The_VASP_Manual\|Contents]]~~

	[[Category:INCAR]][[Category:Many-Body Perturbation Theory]][[Category:GW]]		[[Category:INCAR tag]][[Category:Many-Body Perturbation Theory]][[Category:GW]]

Kaltakm at 12:43, 23 November 2021

2021-11-23T12:43:06Z

← Older revision		Revision as of 12:43, 23 November 2021
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	{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}		{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}
	Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy		Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy
	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}}.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.
	----		----
	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.

Kaltakm at 12:37, 23 November 2021

2021-11-23T12:37:52Z

← Older revision		Revision as of 12:37, 23 November 2021
Line 7:		Line 7:
	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.
	The modified Coulomb kernel is in this case:		The modified Coulomb kernel is in this case:
	<math>v_~~{\bold~~{G}} = \frac{4 \pi e^2} {G^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} G^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)		<math>v_{G} = \frac{4 \pi e^2} {G^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} G^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)
	\qquad \mbox{for} \quad \frac{\hbar^2 G^2 }{2 m_e} > \mathrm{ENCUTGWSOFT}</math>		\qquad \mbox{for} \quad \frac{\hbar^2 G^2 }{2 m_e} > \mathrm{ENCUTGWSOFT}</math>

	If {{TAG\|LSCK}} is set to .TRUE., the squeezed Coulomb kernel is used instead of the cosine window:{{cite\|riemelmoser:jcp:2020}}		If {{TAG\|LSCK}} is set to .TRUE., the squeezed Coulomb kernel is used instead of the cosine window:{{cite\|riemelmoser:jcp:2020}}

	<math>v_~~{\bold~~{G}} = ~~\frac{~~4 \pi e^2} {~~\| \bold~~{G}\|^2} ~~\frac~~{1}{2} \~~left( 1 +~~ \~~cos~~ \~~left(~~ \~~pi \, \frac~~{ \frac{\hbar^{2} \|\~~bold~~{G}\|^2 }{~~2 m_e~~} - \~~mathrm{ ENCUTGWSOFT} }~~{ \~~mathrm~~{~~ENCUTGW} - \mathrm{ENCUTGWSOFT~~}} ~~\right) \right)~~		<math>v_{G} = 4 \pi e^2 \frac{
	~~\qquad \mbox~~{~~for~~} \~~quad G_~~{~~min}<G<G_{max~~} </math>		(G_{max}-G_{min})(G_{max}-G)
			}{
			(G_{min}^2 - G(2G_{min}-G_{max}))^2
			}
			\qquad \mbox{for} \quad \mathrm{ENCUTGWSOFT}=\frac{\hbar^2G_{min}^2}{2m_e}<\frac{\hbar^2 G^2}{2m_e}<\frac{\hbar^2G_{max}^2}{2m_e}=\mathrm{ENCUTGW}</math>

	~~where~~ <math>~~\hbar^2~~ G_{max} = \mathrm{ENCUTGW}</math>		This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}. Effectively, this extrapolates the RPA correlation energy to the {{TAG\|ENCUTGW}} <math>\to \infty</math> limit, assuming that the basis set incompleteness error falls off as <math>1/\mathrm{ENCUTGW}^{3/2}</math>.
	== Related Tags and Sections ==		== Related Tags and Sections ==
	{{TAG\|PRECFOCK}},		{{TAG\|PRECFOCK}},

Kaltakm at 12:26, 23 November 2021

2021-11-23T12:26:05Z

← Older revision		Revision as of 12:26, 23 November 2021
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	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.
	The modified Coulomb kernel is in this case:		The modified Coulomb kernel is in this case:
			<math>v_{\bold{G}} = \frac{4 \pi e^2} {G^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} G^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)
			\qquad \mbox{for} \quad \frac{\hbar^2 G^2 }{2 m_e} > \mathrm{ENCUTGWSOFT}</math>

			If {{TAG\|LSCK}} is set to .TRUE., the squeezed Coulomb kernel is used instead of the cosine window:{{cite\|riemelmoser:jcp:2020}}

	<math>v_{\bold{G}} = \frac{4 \pi e^2} {\| \bold{G}\|^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} \|\bold{G}\|^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)		<math>v_{\bold{G}} = \frac{4 \pi e^2} {\| \bold{G}\|^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} \|\bold{G}\|^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)
	\qquad \mbox{for} \quad ~~\frac{\hbar^2 \|\bold~~{G~~}\|^2 }{2 m_e} > \mathrm~~{~~ENCUTGWSOFT~~}</math>		\qquad \mbox{for} \quad G_{min}<G<G_{max} </math>

			where <math>\hbar^2 G_{max} = \mathrm{ENCUTGW}</math>
	== Related Tags and Sections ==		== Related Tags and Sections ==
	{{TAG\|PRECFOCK}},		{{TAG\|PRECFOCK}},
	{{TAG\|ENCUT}},		{{TAG\|ENCUT}},
	{{TAG\|ENCUTGW}},		{{TAG\|ENCUTGW}},
	{{TAG\|GW calculations}}		{{TAG\|GW calculations}},
			{{TAG\|LSCK}}

	{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}		{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}

Kaltakm at 13:29, 22 November 2021

2021-11-22T13:29:41Z

← Older revision		Revision as of 13:29, 22 November 2021
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	{{TAGDEF\|ENCUTGWSOFT\|[real]}}		{{TAGDEF\|ENCUTGWSOFT\|[real]}}
	{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}		{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}

	{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}		{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}

	Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy		Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy
	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}}.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}}.

← Older revision		Revision as of 05:42, 29 August 2024
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	{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}		{{DEF\|ENCUTGWSOFT\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| for {{TAG\|ALGO}}{{=}}''ACFDT''\|{{TAG\|ENCUTGW}}<math>\times 0.8</math>\| as of VASP.6.3 \| {{TAG\|ENCUTGW}}\|else}}
	{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}		{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}
	Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy		Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for the response function, such that it allows to truncate the Coulomb kernel slowly between the energy
	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.
	----		----
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	This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}.		This kernel ''squeezes'' contributions from large wave vectors <math>G>G_{max}</math> into the window given by {{TAGBL\|ENCUTGWSOFT}}.
			For GW type calculations the squeezed Coulomb kernel was the default (when {{TAGBL\|ENCUTGWSOFT}} was set in the INCAR file) before version vasp.6.3, but
			in newer releases the code always defaults to a smoothed Coulomb kernel (both for GW and RPA type calculations). If one desires to recover the behavior
			of vasp.6.2 and older versions, {{TAG\|LSCK}}=.TRUE. must be set in the INCAR file for GW type calculations if {{TAGBL\|ENCUTGWSOFT}} is set in the INCAR file.


	{{NB\|mind\|The infinite basis set limit extrapolation for RPA/ACFDT is described in more detail [[ACFDT/RPA_calculations#Basis_set_convergence\|here]].}}		{{NB\|mind\|The infinite basis set limit extrapolation for RPA/ACFDT is described in more detail [[ACFDT/RPA_calculations#Basis_set_convergence\|here]].}}
	== Related tags and articles ==		== Related tags and articles ==

← Older revision		Revision as of 14:09, 24 April 2023
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	{{TAG\|ENCUTGW}},		{{TAG\|ENCUTGW}},
	{{TAG\|GW calculations}},		{{TAG\|GW calculations}},
	{{TAG\|LSCK}}		{{TAG\|LSCK}},
	[[ACFDT/RPA_calculations#Basis_set_convergence\|RPA/ACFDT basis set convergence]]		[[ACFDT/RPA_calculations#Basis_set_convergence\|RPA/ACFDT basis set convergence]],
	{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}		{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}
	----		----

	[[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:GW]]		[[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:GW]]

← Older revision		Revision as of 14:08, 24 April 2023
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	{{TAG\|GW calculations}},		{{TAG\|GW calculations}},
	{{TAG\|LSCK}}		{{TAG\|LSCK}}
			[[ACFDT/RPA_calculations#Basis_set_convergence\|RPA/ACFDT basis set convergence]]
	{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}		{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}
	----		----

	[[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:GW]]		[[Category:INCAR tag]][[Category:Many-body perturbation theory]][[Category:GW]]

← Older revision		Revision as of 12:43, 23 November 2021
Line 3:		Line 3:
	{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}		{{NB\|important\|For vasp.6.3 and later releases {{TAG\|ENCUTGWSOFT}} always defaults to {{TAG\|ENCUTGW}}<math>\times 0.8</math>.}}
	Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy		Descprition: The flag {{TAG\|ENCUTGWSOFT}} sets the energy cutoff for response function, such that it allows to truncate the Coulomb kernel slowly between the energy
	specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}}.		specified by {{TAG\|ENCUTGWSOFT}} and {{TAG\|ENCUTGW}} using a cosine window function.
	----		----
	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.

← Older revision		Revision as of 12:26, 23 November 2021
Line 7:		Line 7:
	This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.		This usually leads to much smoother energy-volume curves in {{TAG\|ACFDT calculations}} and {{TAG\|MP2 calculations}}.
	The modified Coulomb kernel is in this case:		The modified Coulomb kernel is in this case:
			<math>v_{\bold{G}} = \frac{4 \pi e^2} {G^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} G^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)
			\qquad \mbox{for} \quad \frac{\hbar^2 G^2 }{2 m_e} > \mathrm{ENCUTGWSOFT}</math>

			If {{TAG\|LSCK}} is set to .TRUE., the squeezed Coulomb kernel is used instead of the cosine window:{{cite\|riemelmoser:jcp:2020}}

	<math>v_{\bold{G}} = \frac{4 \pi e^2} {\| \bold{G}\|^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} \|\bold{G}\|^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)		<math>v_{\bold{G}} = \frac{4 \pi e^2} {\| \bold{G}\|^2} \frac{1}{2} \left( 1 + \cos \left( \pi \, \frac{ \frac{\hbar^{2} \|\bold{G}\|^2 }{2 m_e} - \mathrm{ ENCUTGWSOFT} }{ \mathrm{ENCUTGW} - \mathrm{ENCUTGWSOFT}} \right) \right)
	\qquad \mbox{for} \quad ~~\frac{\hbar^2 \|\bold~~{G~~}\|^2 }{2 m_e} > \mathrm~~{~~ENCUTGWSOFT~~}</math>		\qquad \mbox{for} \quad G_{min}<G<G_{max} </math>

			where <math>\hbar^2 G_{max} = \mathrm{ENCUTGW}</math>
	== Related Tags and Sections ==		== Related Tags and Sections ==
	{{TAG\|PRECFOCK}},		{{TAG\|PRECFOCK}},
	{{TAG\|ENCUT}},		{{TAG\|ENCUT}},
	{{TAG\|ENCUTGW}},		{{TAG\|ENCUTGW}},
	{{TAG\|GW calculations}}		{{TAG\|GW calculations}},
			{{TAG\|LSCK}}

	{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}		{{sc\|ENCUTGWSOFT\|Examples\|Examples that use this tag}}