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GHZ state is a multipartite state (involves more than one party) that is entangled, but Cat state is a single-party state that involves superposition of (possibly macroscopic) components. These two are completely different things that should be described in two different articles. — Preceding unsigned comment added by 70.55.50.158 ( talk) 21:37, 2 September 2014 (UTC)
GHZ and cat states both are non-classical superposition states, but this already the extent of their similarities. Experimental creation and verification protocols, and the communities dealing with either state are not the same. — Preceding unsigned comment added by 81.194.35.225 ( talk) 11:24, 21 October 2013 (UTC)
I have a first degree in physics, and as far as I know a cat state is a (normalized) sum of two coherent states. The latters could be thought of as marcscopic states.-- 89.139.55.163 ( talk) 15:10, 31 July 2010 (UTC)
I know that Greenberger–Horne–Zeilinger state requires N > 2, unlike this article. But it is a weak excuse to existence of two separate articles. Incnis Mrsi ( talk) 18:55, 12 February 2013 (UTC)
The fact that any two subsystems are unentangled in a GHZ state, although it is possibly maximally entangled as a whole, gives it a different conceptual status. This does not appear for cat states in N=2, which may justify a distinct entry.
Do not merge this article with GHZ-states. Both topics are used rather independently in science and despite some similarities they are completely different things. For instance a GHZ-state consists of a distinct number of particles, whereas cat states can have any real α and are often described in terms of continuous variables. Both topics are important enough on their own to deserve distinct articles. Geek3 ( talk) 23:05, 20 September 2015 (UTC)
@ Geek3: could you please confirm that "Wigner distribution" in figure one refers to Wigner quasi-probability distribution? Currently it is pointing to a disambiguation page Wigner distribution.-- MaoGo ( talk) 14:48, 11 June 2019 (UTC)
I've just made an that I hope is helpful... I found the article was a bit confusing since it started out discussing GHZ states in the lead, then suddenly jumped to optical mode cat states. So I've put the GHZ stuff in its own section and left the lead to be general.
On that note, there is this section on the Schrodinger's Cat article which is perhaps useful.
Previous comments seem to lean towards GHZ states not being counted as cat states, perhaps true, in which case this article might need a lot more work. But I wonder if this is a clash between different subcommunities of physics? -- Nanite ( talk) 06:41, 1 July 2020 (UTC)
![]() | This article is rated Start-class on Wikipedia's
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GHZ state is a multipartite state (involves more than one party) that is entangled, but Cat state is a single-party state that involves superposition of (possibly macroscopic) components. These two are completely different things that should be described in two different articles. — Preceding unsigned comment added by 70.55.50.158 ( talk) 21:37, 2 September 2014 (UTC)
GHZ and cat states both are non-classical superposition states, but this already the extent of their similarities. Experimental creation and verification protocols, and the communities dealing with either state are not the same. — Preceding unsigned comment added by 81.194.35.225 ( talk) 11:24, 21 October 2013 (UTC)
I have a first degree in physics, and as far as I know a cat state is a (normalized) sum of two coherent states. The latters could be thought of as marcscopic states.-- 89.139.55.163 ( talk) 15:10, 31 July 2010 (UTC)
I know that Greenberger–Horne–Zeilinger state requires N > 2, unlike this article. But it is a weak excuse to existence of two separate articles. Incnis Mrsi ( talk) 18:55, 12 February 2013 (UTC)
The fact that any two subsystems are unentangled in a GHZ state, although it is possibly maximally entangled as a whole, gives it a different conceptual status. This does not appear for cat states in N=2, which may justify a distinct entry.
Do not merge this article with GHZ-states. Both topics are used rather independently in science and despite some similarities they are completely different things. For instance a GHZ-state consists of a distinct number of particles, whereas cat states can have any real α and are often described in terms of continuous variables. Both topics are important enough on their own to deserve distinct articles. Geek3 ( talk) 23:05, 20 September 2015 (UTC)
@ Geek3: could you please confirm that "Wigner distribution" in figure one refers to Wigner quasi-probability distribution? Currently it is pointing to a disambiguation page Wigner distribution.-- MaoGo ( talk) 14:48, 11 June 2019 (UTC)
I've just made an that I hope is helpful... I found the article was a bit confusing since it started out discussing GHZ states in the lead, then suddenly jumped to optical mode cat states. So I've put the GHZ stuff in its own section and left the lead to be general.
On that note, there is this section on the Schrodinger's Cat article which is perhaps useful.
Previous comments seem to lean towards GHZ states not being counted as cat states, perhaps true, in which case this article might need a lot more work. But I wonder if this is a clash between different subcommunities of physics? -- Nanite ( talk) 06:41, 1 July 2020 (UTC)