Limitation to Quantum Measurements of Space-Time Distancesa

Relativity as the quantum mechanics of space-time measurements

Can a simple microscopic model of space and time demonstrate Special Relativity as the macroscopic (aggregate) behavior of an ensemble ? The question will be investigated in three parts. First, it is shown that the Lorentz transformation formally stems from the First Relativity Postulate (FRP) alone if space-time quantization is a fundamental law of physics which must be included as part of the...

Time in quantum measurements.

We analyze canonical measurements involving momentum and position and show that they require a finite duration. A formalism that we have developed for a realistic description of quantum measurements is generalized to the multitime case. This enables us to derive rigorous and unambiguous time-energy uncertainty relations. For a free particle, we find that T6H 2 f, where 6H is the variance in the...

Space-Time Approach to Quantum Chaos

The Quantum Space-Time

Rapporteur talk at the 2011 Solvay Conference

Space-Time Quantum Imaging

We report on an experimental and theoretical investigation of quantum imaging where the images are stored in both space and time. Ghost images of remote objects are produced with either one or two beams of chaotic laser light generated by a rotating ground glass and two sensors measuring the reference field and bucket field at different space-time points. We further observe that the ghost image...