1550-7998=20 We discuss prospects for direct measurement of stochastic gravitational wave background around 0.1– 1 Hz with future space missions. It is assumed to use correlation analysis technique with the optimal timedelay-interferometry (TDI) variables for two sets of LISA-type interferometers. The signal to noise for detection of the background and the estimation errors for its basic parame...

With seismic interferometry a virtual source can be created inside a medium, assuming a receiver is present at the position of the virtual source. Here we discuss a method that creates a virtual source inside a medium from reflection data, without needing a receiver inside the medium. Apart from the reflection data, an estimate of the direct arrivals is required. However, no information about t...

Using general two-and one-way representations for scattered wavefields, we fully describe two-and one-way extended images obtained in wave-equation imaging. This formulation explicitly connects the wavefield correlations done in seismic imaging with the theory and practice of wavefield interferometry. We show that extended images actually behave as local scattered fields in the image domain. Th...

Holographie Interferometry methods have been successfully employed to characterize the materials and behavior of diverse types of structures under stress 1'2'3• Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior4• Such applications ofholographic technique offer some ofthe most effective methods of modal and dynamic analys...

We study the phase sensitivity of SU(2) and SU(1,1) interferometers fed by two-mode field states which are intelligent states for Hermitian generators of the SU(2) and SU(1,1) groups, respectively. Intelligent states minimize uncertainty relations and this makes possible an essential reduction of the quantum noise in interferometers. Exact closed expressions for the minimum detectable phase shi...

A theory of BEC interferometry in an unsymmetrical doublewell trap has been developed for small boson numbers, based on the two-mode approximation. The bosons are initially in the lowest mode of a single well trap, which is split into a double well and then recombined. Possible fragmentations into separate BEC states in each well during the splitting/recombination process are allowed for. The B...

Physical models of circumstellar disks surrounding pre-main sequence stars are currently constrained primarily by the spectral energy distribution (SED) of the system. Here we present first results from a survey of nearby Herbig Ae stars using nulling interferometry. We measure the spatial extent of the mid-IR emission for the stars HD 150193, HD 163296, and HD 179218. The results indicate the ...

A novel nondestructive testing (NDT) method where measurement of large object deformations using temporal evolution of the speckles in speckle interferometry is reported. Basic principle of the method is continuous object deformation is introduced and the fluctuations in the phase of the speckle as intensity modulation is recorded. Acquiring a large number of frames of the object motion the pha...

Continued excessive extraction of groundwater may lead to significant land subsidence, which causes economic loss. The aim of this research is to investigate ground subsidence in several Australian capital cities using the Persistent Scatterer Interferometry approach. Such studies may help improve our understanding of the deformation of terrain and built structures, and evaluate the effectivene...

Seismic interferometry refers to the process of retrieving new seismic responses by crosscorrelating seismic observations at different receiver locations. Seismic migration is the process of forming an image of the subsurface by wavefield extrapolation. Comparing the expressions for backward propagation known from migration literature with the Green’s function representations for seismic interf...