A superoperator has the same relation to an ordinary linear operator as the linear operator has to a state vector. The notation "superoperator" was suggested by Crawford 1 . However, a variety of superoperators had been operating for many years before they were classified collectively as "...
On the exponential solution of differential equations for a linear operator . W Magnus - 《Communications on Pure & Applied Mathematics》 被引量: 898发表: 2010年 A comparison of different propagation schemes for the time dependent Schrdinger equation A comparison of three widely used time propagatio...
arisk-defusing operator 风险拆除的雷管的操作员[translate] a既然希望过得更好,有这样的信念,就会有种动力努力学习. Since hoped crosses well, has such faith, can have plants the power to study diligently.[translate] a宝宝幸福 Baby happiness[translate] ...
A new operational semantics for "pure" CCS is proposed that considers the parallel operator as a first class one, and permits a description of the calculus... P Degano,RD Nicola,U Montanari - 《Theoretical Computer Science》 被引量: 185发表: 1990年 Towards a semantics for Erlang Timestamps...
where \({\hat{S}}_{\alpha }\) is a spin projection operator for α = (x, y, z) axis, index s = ± denotes two electron subbands, \({\varepsilon }_{k}^{s}\) and \(|{u}_{k}^{s}\rangle \) are the energy and the Bloch amplitude of an electron in the state...
aoperator window.[translate] athis ensured that the Regiment was fully engaged with regional activities and meant that many members of the Permanent Staff of the Regiment were able to find attractive, full time employment when they retired from the Regular Army. 这保证军团充分地地方活动与$$4相...
In the interaction picture correlation in time is carried by the part of the time-ordering operator T which is antisymmetric in time. It is this part of T that gives nonequal weight to the time ordering of the interactions causing the electron transitions. The antisymmetric part of T is non...
Motivated by the noncommutativity\nbetween time-ordering and time derivation, and related problems raised recently\nin statistical physics, we introduce a generalization of the Magnus expansion.\nWhereas the classical expansion computes the logarithm of the evolution\noperator of a linear differential ...
In the interaction picture correlation in time is carried by the part of the time-ordering operator T which is antisymmetric in time. It is this part of T that gives nonequal weight to the time ordering of the interactions causing the electron transitions. The antisymmetric part of T is non...
Whereas the classical expansion computes the logarithm of the evolution operator of a linear differential equation, our generalization addresses the same problem, including however directly a non-trivial initial condition. As a by-product we recover a variant of the time ordering operation, known as ...