21 citations · 39 across the 3 of their papers we have counts for
3 papers
quant-ph2009
The effect of linear terms in a quadratic Hamiltonian
Mark Andrews
For a non-relativistic particle subject to a Hamiltonian that is quadratic in position and momentum, with coefficients that may vary with time, it is shown that the effect of the l…
quant-ph2007★ 21 cited
The evolution of free wave packets
Mark Andrews
We discuss four general features of force-free evolution: (1) The spatial spread of any packet changes with time in a very simple way. (2) Over sufficiently short periods of time (…
quant-ph2007★ 18 cited
Bounds to unitary evolution
Mark Andrews
Upper and lower bounds are established for the survival probability of a quantum state, in terms of the energy moments . Introducing a cut-of…