Abstract
Variational calculations of the effective potential, going beyond the Gaussian innthe context of λO 4 theory. Following Polley and Ritschel we use trial wave functionals obtained by a nontrivial unitary operator U=e −isB acting on a Gaussian wave functional. We discuss in detail two cases in which the operator B has the forms (i) B=π 3 , and (ii) B=π R O T 2 , where O isthe field operator and π is its canonical conjugate. [R and T refer to radial and transverse directions in the O(N)-symmetric case.] We calculate the expectation value of the Hamiltonian in the non-Gaussian trial states thus generated, and obtain the optimization equations for the variational-parameter functions of the ansatz
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
