scholarly journals Measuring gravitational time dilation with delocalized quantum superpositions

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Albert Roura ◽  
Christian Schubert ◽  
Dennis Schlippert ◽  
Ernst M. Rasel
Keyword(s):  
Time Dilation ◽  
Quantum Superpositions

scholarly journals Gravitational time dilation induced decoherence in spontaneous emission

2017 ◽  
Vol 31 (23) ◽  
pp. 1750214
Author(s):  
Dong Xie ◽  
Chunling Xu ◽  
An Min Wang
Keyword(s):  
Reference Frame ◽  
Spontaneous Emission ◽  
Reference Frames ◽  
Delayed Feedback ◽  
Time Dilation ◽  
Superposition State ◽  
Quantum Superpositions ◽  
Time Delayed Feedback ◽  
Position State ◽  
Decoherence Effect

We investigate decoherence of quantum superpositions induced by gravitational time dilation and spontaneous emission between two atomic levels. It has been shown that gravitational time dilation can be a universal decoherence source by Pikovski et al. Here, we consider the decoherence induced by the gravitational time dilation only in the situation of spontaneous emission. We obtain the analytical results of the coherence of particle’s position state. Then, we obtain that the coherence of particle’s position state depends on reference frame because the time dilation changes the distinguishability of emitted photons from two positions of particle in different reference frames. For observing the decoherence effect induced by the gravitational time dilation, time-delayed feedback can be utilized to increase the decoherence of particle’s superposition state.

The Equivalence Principle

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
General Relativity ◽  
Special Relativity ◽  
Equivalence Principle ◽  
Time Dilation ◽  
Gravitational Redshift ◽  
Coordinate Systems ◽  
Spacetime Metric

The equivalence principle is an important thinking tool to bootstrap our thinking from the inertial coordinate systems of special relativity to the more complex coordinate systems that must be used in the presence of gravity (general relativity). The equivalence principle posits that at a given event gravity accelerates everything equally, so gravity is equivalent to an accelerating coordinate system.This conjecture is well supported by precise experiments, so we explore the consequences in depth: gravity curves the trajectory of light as it does other projectiles; the effects of gravity disappear in a freely falling laboratory; and gravitymakes time runmore slowly in the basement than in the attic—a gravitational form of time dilation. We show how this is observable via gravitational redshift. Subsequent chapters will build on this to show how the spacetime metric varies with location.

Energy and Momentum

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Time Dilation ◽  
Speed Of Light ◽  
Massless Particles ◽  
The Everyday ◽  
Low Speeds ◽  
Energy And Momentum ◽  
Deep Relationship ◽  
Insight Into ◽  
Momentum Relation

Tis chapter explains the famous equation E = mc2 as part of a wider relationship between energy, mass, and momentum. We start by defning energy and momentum in the everyday sense. We then build on the stretching‐triangle picture of spacetime vectors developed in Chapter 11 to see how energy, mass, and momentum have a deep relationship that is not obvious at everyday low speeds. When momentum is zero (a mass is at rest) this energy‐momentum relation simplifes to E = mc2, which implies that mass at rest quietly stores tremendous amounts of energy. Te energymomentum relation also implies that traveling near the speed of light (e.g., to take advantage of time dilation for interstellar journeys) will require tremendous amounts of energy. Finally, we look at the simplifed form of the energy‐momentum relation when the mass is zero. Tis gives us insight into the behavior of massless particles such as the photon.

scholarly journals Time Dilation and Contraction for Programmable Analog Devices with Jaunt

2018 ◽  
Vol 53 (2) ◽  
pp. 229-242
Author(s):  
Sara Achour ◽  
Martin Rinard
Keyword(s):  
Time Dilation ◽  
Programmable Analog

scholarly journals Utilizing relativistic time dilation for time-resolved studies

2021 ◽  
Vol 154 (11) ◽  
pp. 111107
Author(s):  
Hazem Daoud ◽  
R. J. Dwayne Miller
Keyword(s):  
Time Dilation ◽  
Time Resolved ◽  
Relativistic Time

scholarly journals Attosecond XUV probing of vibronic quantum superpositions in Br2+

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Yuki Kobayashi ◽  
Daniel M. Neumark ◽  
Stephen R. Leone
Keyword(s):  
Quantum Superpositions

scholarly journals Quantum time dilation in atomic spectra

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Piotr T. Grochowski ◽  
Alexander R. H. Smith ◽  
Andrzej Dragan ◽  
Kacper Dębski
Keyword(s):  
Time Dilation ◽  
Atomic Spectra ◽  
Quantum Time

scholarly journals Probing macroscopic quantum superpositions with nanorotors

2018 ◽  
Vol 20 (12) ◽  
pp. 122001 ◽  
Author(s):  
Benjamin A Stickler ◽  
Birthe Papendell ◽  
Stefan Kuhn ◽  
Björn Schrinski ◽  
James Millen ◽  
...  
Keyword(s):  
Macroscopic Quantum ◽  
Quantum Superpositions
Sign in / Sign up

Export Citation Format

Share Document