Transformation devices: event carpets in space and space-time

P. Kinsler, M. W. McCall

    Department of Physics, 
    Imperial College,
    Prince Consort Road,
    London SW7 2AZ, 
    United Kingdom.


    Phys. Rev. A89 063818 (2014) 
    doi:10.1103/PhysRevA.89.063818
    arXiv:1308.3358

   Here we extend the theory of space-time or event cloaking into that
based on the carpet or ground-plane reflective surface. Further, by
recasting and generalizing a scalar acoustic wave model into a new
mathemati- cally covariant form, we also show how transformation
theories for optics and acoustics can be combined into a single
prescription. The single prescription, however, still respects the
fundamental differences between electromagnetic and acoustic waves,
which then provide us with an existence test for any desired
transformation device ­ are the required material properties (the
required constitutive parameters) physically permitted by the wave
theory for which it is being designed? Whilst electromagnetism is a
flexible theory permitting almost any transformation-device (T-device)
design, we show that the acoustic model used here is more restricted.




Email: Dr.Paul.Kinsler@physics.org