30 research outputs found
Past of a quantum particle: Common sense prevails
We analyze Vaidman's three-path interferometer with weak path marking [Phys.
Rev. A 87, 052104 (2013)] and find that common sense yields correct statements
about the particle's path through the interferometer. This disagrees with the
original claim that the particles have discontinuous trajectories at odds with
common sense. In our analysis, "the particle's path" has operational meaning as
acquired by a path-discriminating measurement. For a quantum-mechanical
experimental demonstration of the case, one should perform a single-photon
version of the experiment by Danan et al. [Phys. Rev. Lett. 111, 240402 (2013)]
with unambiguous path discrimination. We present a detailed proposal for such
an experiment.Comment: v1: 20 pages, 15 figures; v2 and v3: 20 pages, 16 figures, text and
figures edited, references update
Entanglement detection with minimal tomography using witness bases measurement
Master'sMASTER OF SCIENC
Progress in dark tourism and thanatourism research: An uneasy relationship with heritage tourism
This paper reviews academic research into dark tourism and thanatourism over the 1996–2016 period. The aims of this paper are threefold. First, it reviews the evolution of the concepts of dark tourism and thanatourism, highlighting similarities and differences between them. Second it evaluates progress in 6 key themes and debates. These are: issues of the definition and scope of the concepts; ethical issues associated with such forms of tourism; the political and ideological dimensions of dark tourism and thanatourism; the nature of demand for places of death and suffering; the management of such places; and the methods of research used for investigating such tourism. Third, research gaps and issues that demand fuller scrutiny are identified. The paper argues that two decades of research have not convincingly demonstrated that dark tourism and thanatourism are distinct forms of tourism, and in many ways they appear to be little different from heritage tourism