Re: [Kwant] Difference between hop[0].tag and hop[1].tag
Dear Adel, I do thank you for link. Everything is clear now since the linke describes in detains (site, family, tag, etc) Regards Adel Le mar. 10 sept. 2019 à 09:40, Abbout Adel a écrit : > Dear Adel, > > It seems that you did not get it correctly. A hopping is a tuple of two > sites which make a bond in your lattice. So the direction is not important. > > Hop=(site1,site2) > Hop[0]=site1 > Hop[1]=site2 > > I suggest to you to have a look at the frequently asked questions in kwant > [1]. It explains a lot of interesting things. > > I hope this helps. > Regards, > Adel > > [1] https://kwant-project.org/doc/1/tutorial/faq > > On Mon, Sep 9, 2019 at 2:15 PM Adel Belayadi wrote: > >> Dear Joseph. >> Thank you for your reply. If I got it well, you mean the first site the >> hopping along x direction and second site the hopping in the y direction. >> Best >> A.BELAYADI >> >> Le lun. 2 sept. 2019 à 09:15, Joseph Weston >> a écrit : >> >>> Hello, >>> >>> >>> What is the difference between hop[0].tag and hop[1].tag >>> >>> hop[0].tag is the tag of the first site in the hopping and hop[1].tag is >>> the tag of the second site in the hopping. >>> >>> >>> >>> My second question >>> the onsite fuction for example: def onsite(site, V):return V >>> >>> why it depends on site where the shape functions for example >>> def circle(pos): rsq = pos[0] ** 2 + pos[1] ** 2 >>> depends on pos >>> >>> Because when creating a shape in realspace you typically only care >>> about the position, whereas your onsite matrix elements could potentially >>> depend on other things (e.g. the lattice that the site is from) >>> >>> >>> Happy Kwanting, >>> >>> >>> Joe >>> >> > > -- > Abbout Adel >
Re: [Kwant] Difference between hop[0].tag and hop[1].tag
Dear Adel, It seems that you did not get it correctly. A hopping is a tuple of two sites which make a bond in your lattice. So the direction is not important. Hop=(site1,site2) Hop[0]=site1 Hop[1]=site2 I suggest to you to have a look at the frequently asked questions in kwant [1]. It explains a lot of interesting things. I hope this helps. Regards, Adel [1] https://kwant-project.org/doc/1/tutorial/faq On Mon, Sep 9, 2019 at 2:15 PM Adel Belayadi wrote: > Dear Joseph. > Thank you for your reply. If I got it well, you mean the first site the > hopping along x direction and second site the hopping in the y direction. > Best > A.BELAYADI > > Le lun. 2 sept. 2019 à 09:15, Joseph Weston a > écrit : > >> Hello, >> >> >> What is the difference between hop[0].tag and hop[1].tag >> >> hop[0].tag is the tag of the first site in the hopping and hop[1].tag is >> the tag of the second site in the hopping. >> >> >> >> My second question >> the onsite fuction for example: def onsite(site, V):return V >> >> why it depends on site where the shape functions for example >> def circle(pos): rsq = pos[0] ** 2 + pos[1] ** 2 >> depends on pos >> >> Because when creating a shape in realspace you typically only care about >> the position, whereas your onsite matrix elements could potentially depend >> on other things (e.g. the lattice that the site is from) >> >> >> Happy Kwanting, >> >> >> Joe >> > -- Abbout Adel
Re: [Kwant] Difference between hop[0].tag and hop[1].tag
Dear Joseph. Thank you for your reply. If I got it well, you mean the first site the hopping along x direction and second site the hopping in the y direction. Best A.BELAYADI Le lun. 2 sept. 2019 à 09:15, Joseph Weston a écrit : > Hello, > > > What is the difference between hop[0].tag and hop[1].tag > > hop[0].tag is the tag of the first site in the hopping and hop[1].tag is > the tag of the second site in the hopping. > > > > My second question > the onsite fuction for example: def onsite(site, V):return V > > why it depends on site where the shape functions for example > def circle(pos): rsq = pos[0] ** 2 + pos[1] ** 2 > depends on pos > > Because when creating a shape in realspace you typically only care about > the position, whereas your onsite matrix elements could potentially depend > on other things (e.g. the lattice that the site is from) > > > Happy Kwanting, > > > Joe >
Re: [Kwant] Difference between hop[0].tag and hop[1].tag
Hello, > > What is the difference between hop[0].tag and hop[1].tag > hop[0].tag is the tag of the first site in the hopping and hop[1].tag is the tag of the second site in the hopping. > > My second question > the onsite fuction for example: def onsite(site, V):return V > > why it depends on site where the shape functions for example > def circle(pos): rsq = pos[0] ** 2 + pos[1] ** 2 > depends on pos Because when creating a shape in realspace you typically only care about the position, whereas your onsite matrix elements could potentially depend on other things (e.g. the lattice that the site is from) Happy Kwanting, Joe signature.asc Description: OpenPGP digital signature
