Relativistically invariant extension of the de Broglie-Bohm theory of quantum mechanics

We show that quantum mechanics can be given a Lorentz-invariant realistic interpretation by applying our recently proposed relativistic extension of the de Broglie-Bohm theory to deduce non-locally correlated, Lorentz-invariant individual particle motions for the Einstein-Podolsky-Rosen experiment and the double-interferometer experiment proposed by Horne, Shimony and Zeilinger.Comment: Revised version thanks to the referees comments. 4 pages, 4 figure

Forget Photography: The Arts Council and the Disappearance of Independent Photography in Neoliberal Britain.

This paper starts from the perspective that for some time we have been living with photography’s afterlife in which contemporary photography is a ruined territory populated by archaic knowledge practices. The way out of photography explored in this paper is through forgetting the spectral presence of photography in order, on the one hand, to see the new conditions of the image and on the other, to witness the trauma of photography’s several deaths. This is achieved by a trick of adopting the future present from which photographic knowledge practices of collection, exhibition and archiving appear as discontinuous with the present and capable of cold case reinvestigation. The art museum has absorbed photography through a process of modernist purification, continually expunging the hybrids of the contemporary image and hence, paradoxically, admits not a medium capable of examining the present, but photography as heritage. In November 2014, Tate released a press statement announcing its ‘continuing commitment to photography’. Like a guilty secret, the phrase introduces a note of doubt on the very thing it claims to have, a commitment to photography, as if Tate knew there was a whispering campaign which said, ‘Tate has never been committed to photography’. Photography in Britain, under the odd title ‘independent photography’ delineated a category of documentary photography distinct from the commercial and industrial. Independent photography was also considered distinct from photography in contemporary art and was championed and supported by the Arts Council of Great Britain through a photography committee established by Barry Lane. Lane built up considerable influence within Visual Arts at the Arts Council, with an increasing annual budget to support independent photographers and award grants to independent photography and galleries. British independent photography was forged by the consequences of deindustrialisation and the callous support of a Conservative led state, which was resisted by communities and trade unions and led to social strife and displacement. This was the context in which renewed social documentary and community photographic practices emerged, which were disdained by the British art establishment. Barry Lane left the Arts Council in 1995 as a consequence of its decision to dissolve the photography panel, annexing its budget to visual arts on the very argument that there was no longer any distinction between photography and art. Thus, one obstacle to admitting photography to the art museum had been removed.

Forget Photography Chapter 1

Forgetting photography attempts to develop a systematic method for revealing the limits and prescriptions of thinking with photography, which no amount of revisionism of post-photographic theory can get beyond. The world urgently needs to unthink photography and go beyond it in order to understand the present constitution of the image as well as the reality or world it shows. Forgetting photography will require a different way of organizing knowledge about the visual in culture that involves crossing different knowledges of visual culture, technologies, and mediums. It will also involve thinking differently about routine and creative labor and its knowledge practices within the institutions and organization of visual reproduction

Higher-dimensional tree structures

AbstractVarious generalizations of tree-characterization theorems are developed for n-dimensional complexes. In particular, generalizations of three conditions satisfied by trees T are studied: T is connected, T is acyclic, |V(T)| − |E(T)| = 1, where V(T) and E(T) denote the vertex and edge sets of T, respectively.Earlier work by Beineke and Pippert is extended in generalizing these conditions and studying which combinations of such conditions yield characterizations of the n-dimensional trees treated here

Measurement, Decoherence and Chaos in Quantum Pinball

The effect of introducing measuring devices in a ``quantum pinball'' system is shown to lead to a chaotic evolution for the particle position as defined in Bohm's approach to Quantum Mechanics.Comment: Latex, uses ioplppt style, two figures. Also can be ftp'd anonymously from: ftp://zaphod.phys.port.ac.uk/pub/papers/paper2

A non-local, Lorentz-invariant, hidden-variable interpretation of relativistic quantum mechanics based on particle trajectories

We demonstrate how to construct a lorentz-invariant, hidden-variable interpretation of relativistic quantum mechanics based on particle trajectories. The covariant theory that we propose employs a multi-time formalism and a lorentz-invariant rule for the coordination of the space-time points on the individual particle trajectories. In this way we show that there is no contradiction between nonlocality and lorentz invariance in quantum mechanics. The approach is illustrated for relativistic bosons, using a simple model to discuss the individual non-locally correlated particle motion which ensues when the wavefunction is entangled. A simple example of measurement is described.Comment: 12 pages, 2 figure