Can we create a public ticket in Jira such that an external person can also view and comment ?

[Keerti Joshi]

Can we create a public ticket in Jira such that an external person can also view and comment ?

I need to give access to only a particular ticket, not the access to see other tickets on a project. It can be public ticket as well which is not part of the closed project. Is it possible to attain this? If yes, how? 

Thanks!