firstname = "Juan Mateos" lastname = "Guilarte" email = "guilarte@usal.es" affiliation = "Universidad de Salamanca" city = "Salamanca" country = "Espaņa" visa = "yes" passportname = "Juan Maria Mateos Guilarte" birthday = "15-02-1949" citizenship = "Spanish" passportnumber = "AA413690 R" passportissued = "23-02-2004" passportexpire = "23-02-2014" workplace = "Universidad de Salamanca. Catedratico" workaddress = "Departamento de Fisica Fundamental. " visadates = "30-09-2013 / 5-10-2013" transfer = "yes" talktitle = "False vacua, tunnel determinants, zeta functions" section = "A - Particle physics" talkabstract = " The tunneling amplitudes between degenerate absolute vacua or relative and absolute classical minima in quantum systems are proportional to an exponentially decaying factor involving the classical action of instantons or bounces. The factor of proportionality is the determinant of a differential operator of Schrodinger type that usually is dealt with ā la Gelfand/Yaglom form. My plan is to show how the Ray-Singer definition of elliptic operator determinants from the derivative of their spectral zeta function can help in the determination of the tunnel determinants. In particular this technique is very useful in dealing with the worrysome zero modes." comments = " Because there is still a great lapse of time to go until the dates of the workshop the Title and the Abstract proposed above must be understood as a zero order approximation." submit = 0