ghosting names a corporeal trace that is ‘left’ when the main event evaporates or is destroyed but still manages to produce an offset. freud famously clarified this via the role of the unconscious and the trace effect of trauma left on it by the experiences in everyday life. freud’s simple example: take a wax block and paper. write something on the paper; pull the paper off the block– the paper has ‘no trace’ of the work, but the wax still have a corporeal impression. now shift this to computing wave functions: an offset may be produced when suddenly an interference pattern (like peaks and troughs destroying each other depending on whether they are in phase) are out of sync. the ghosting is born