We show that four-dimensional systems may exhibit a topological phase transition analogous to the well-known Berezinskii-Kosterlitz-Thouless vortex unbinding in two-dimensional systems. The realisation of an engineered quantum system, where predicted shall occur, is also presented. study suitable generalization sine-Gordon model four dimensions and renormalization group flow equation its coupli...

Quantum vortices in superfluids have been an important research area for many decades. Naturally, on this topic has focused two and three-dimensional superfluids, which vortex cores form points lines, respectively. Very recently, however, there growing interest the quantum simulation of systems with four spatial dimensions; raises question how would behave a higher-dimensional superfluid. In pa...

Ought parents, in general, to value being biologically tied to their children? Is it important, in particular, that both parents be biologically tied to their children? I will address these fundamental questions by looking at a fairly new practice within IVF treatments, so-called IVF-with-ROPA (Reception of Oocytes from Partner), which allows lesbian couples to 'share motherhood', with one part...

In the autumn of 1995 the Haymarket Theatre, Leicester, UK, staged two plays which offer a dramatic treatment of the politics of motherhood: Timberlake Wertenbaker's The Break of Day (Haymarket Mainhouse, first performance 26 October 1995) and Ruth Carter's A Yearning (Haymarket Studio, 31 October to 4 November 1995). Neither play had significant box-office success, and The Break of Day receive...