Turbulence-free space-time quantum imaging

2013 ◽  
Author(s):  
Ronald E. Meyers ◽  
Keith S. Deacon ◽  
Arnold Tunick
Keyword(s):  
Free Space ◽  
Space Time ◽  
Quantum Imaging ◽  
Time Quantum

Space-time quantum imaging

2013 ◽  
Author(s):  
Ronald E. Meyers ◽  
Keith S. Deacon ◽  
Arnold Tunick
Keyword(s):  
Space Time ◽  
Quantum Imaging ◽  
Time Quantum

scholarly journals Space-Time Quantum Imaging

Entropy ◽  
2015 ◽  
Vol 17 (3) ◽  
pp. 1508-1534 ◽  
Author(s):  
Ronald Meyers ◽  
Keith Deacon
Keyword(s):  
Space Time ◽  
Quantum Imaging ◽  
Time Quantum

scholarly journals Shaping Dynamical Casimir Photons

Universe ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 189
Author(s):  
Diego A. R. Dalvit ◽  
Wilton J. M. Kort-Kamp
Keyword(s):  
Optical Properties ◽  
Lattice Structure ◽  
Casimir Effect ◽  
Surface Profile ◽  
Microscopic Theory ◽  
Space Time ◽  
Quantum Vacuum ◽  
Dynamical Casimir Effect ◽  
Photon Pairs ◽  
Time Quantum

Temporal modulation of the quantum vacuum through fast motion of a neutral body or fast changes of its optical properties is known to promote virtual into real photons, the so-called dynamical Casimir effect. Empowering modulation protocols with spatial control could enable the shaping of spectral, spatial, spin, and entanglement properties of the emitted photon pairs. Space–time quantum metasurfaces have been proposed as a platform to realize this physics via modulation of their optical properties. Here, we report the mechanical analog of this phenomenon by considering systems in which the lattice structure undergoes modulation in space and in time. We develop a microscopic theory that applies both to moving mirrors with a modulated surface profile and atomic array meta-mirrors with perturbed lattice configuration. Spatiotemporal modulation enables motion-induced generation of co- and cross-polarized photon pairs that feature frequency-linear momentum entanglement as well as vortex photon pairs featuring frequency-angular momentum entanglement. The proposed space–time dynamical Casimir effect can be interpreted as induced dynamical asymmetry in the quantum vacuum.

Momentum space techniques for curved space–time quantum field theory

1979 ◽  
Vol 367 (1728) ◽  
pp. 123-141 ◽  
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Momentum Space ◽  
Nuclear Physics ◽  
Space Time ◽  
Coordinate Space ◽  
Quantum Field ◽  
Curved Space ◽  
Time Quantum ◽  
Space Formulation

A momentum space formulation of curved space–time quantum field theory is presented. Such a formulation allows the riches of momentum space calculational techniques already existing in nuclear physics to be exploited in the application of quantum field theory to cosmology and astrophysics. It is demonstrated that one such technique can allow exact, or very accu­rate approximate, results to be obtained in cases which are intractable in coordinate space. An efficient method of numerical solution is also described.

Complex Permittivity and Thickness Evaluation of Low-Loss Dielectrics From Uncalibrated Free-Space Time-Domain Measurements

2021 ◽  
pp. 1-10
Author(s):  
Ugur Cem Hasar ◽  
Yunus Kaya ◽  
Hamdullah Ozturk ◽  
Mucahit Izginli ◽  
Joaquim Jose Barroso ◽  
...  
Keyword(s):  
Time Domain ◽  
Complex Permittivity ◽  
Free Space ◽  
Space Time ◽  
Low Loss ◽  
Thickness Evaluation
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