



01052nas a2200145   4500008004100000245005700041210005600098260001500154490000700169520062400176100002700800700002300827700001900850856003700869       2013                        eng d00aQuantum Cherenkov Radiation and Non-contact Friction0 aQuantum Cherenkov Radiation and Noncontact Friction  c2013/10/210 v883 a  We present a number of arguments to demonstrate that a quantum analog of
Cherenkov effect occurs when two dispersive objects are in relative motion.
Specifically we show that two semi-infinite plates experience friction beyond a
threshold velocity which, in their center-of-mass frame, is the phase speed of
light within their medium. The loss in mechanical energy is radiated away
through the plates before getting fully absorbed in the form of heat. By
deriving various correlation functions inside and outside the two plates, we
explicitly compute the radiation, and discuss its dependence on the reference
frame.
1 aMaghrebi, Mohammad, F.1 aGolestanian, Ramin1 aKardar, Mehran  uhttp://arxiv.org/abs/1304.4909v201136nas a2200145   4500008004100000245005800041210005600099260001300155490000700168520070900175100002700884700002300911700001900934856003700953       2013                        eng d00aA Scattering Approach to the Dynamical Casimir Effect0 aScattering Approach to the Dynamical Casimir Effect  c2013/1/70 v873 a  We develop a unified scattering approach to dynamical Casimir problems which
can be applied to both accelerating boundaries, as well as dispersive objects
in relative motion. A general (trace) formula is derived for the radiation from
accelerating boundaries. Applications are provided for objects with different
shapes in various dimensions, and undergoing rotational or linear motion.
Within this framework, photon generation is discussed in the context of a
modulated optical mirror. For dispersive objects, we find general results
solely in terms of the scattering matrix. Specifically, we discuss the vacuum
friction on a rotating object, and the friction on an atom moving parallel to a
surface.
1 aMaghrebi, Mohammad, F.1 aGolestanian, Ramin1 aKardar, Mehran  uhttp://arxiv.org/abs/1210.1842v2