Shedding light on the fabric of space-time

Overcoming classical measurement limits through entanglement in photon number: an introduction

“…In the last few years this common wisdom has been challenged [26][27][28][29][30][31][32]. A first series of testable proposals concerned photons propagating over cosmological distances [26][27][28], with the problem of extracting QG effects from a limited (and uncontrollable) observational sample affected by various propagation effects.…”

“…In the last few years this common wisdom has been challenged [26][27][28][29][30][31][32]. A first series of testable proposals concerned photons propagating over cosmological distances [26][27][28], with the problem of extracting QG effects from a limited (and uncontrollable) observational sample affected by various propagation effects. More recently, effects in interferometers connected to non-commutativity of position variables in different directions [29][30][31] have been considered both for cavities with microresonators [29] and for an apparatus based on two coupled interferometers [30,31], as in the case of the so-called "holometer", i.e.…”

The OPERA neutrino velocity result and the synchronisation of clocks

“…ns than that expected if they traveled at the speed of light c. If true, such a claim would have profound consequences for our understanding of fundamental physics. Various authors have already commented on more or less exotic Lorentz violating theories for the neutrino that may account for the result [2][3][4][5][6][7][8][9][10]. Here we address the question of whether the stated measurement of the neutrino velocity is self-consistent.…”

Overcoming classical measurement limits through entanglement in photon number: an introduction

“…A first series of testable proposals concerned photons propagating over cosmological distances [26][27][28], with the problem of extracting QG effects from a limited (and uncontrollable) observational sample affected by various propagation effects. More recently, effects in interferometers connected to non-commutativity of position variables in different directions [29][30][31] have been considered both for cavities with microresonators [29] and for an apparatus based on two coupled interferometers [30,31], as in the case of the so-called "holometer", i.e.…”

“…In the last few years this common wisdom has been challenged [26][27][28][29][30][31][32]. A first series of testable proposals concerned photons propagating over cosmological distances [26][27][28], with the problem of extracting QG effects from a limited (and uncontrollable) observational sample affected by various propagation effects.…”