Analogue Gravity: History, Models and Prospects

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In summary, the authors present a review of analogue models of gravity, which have a long history and have recently seen a surge in development. They provide a simple example of an analogue model and discuss its potential applications, including quantum acoustic effects and analogue black holes. The review is intended as a comprehensive introduction to the field and is relevant to both theorists and experimentalists studying the interface between general relativity and quantum theory.
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Analogue Gravity
Authors: Carlos Barcelo (IAA, Granada), Stefano Liberati (SISSA/ISAS, Trieste), Matt Visser (Victoria University of Wellington)
Comments: 151 pages; 12 figures; 427 references. This is a draft of a "Living Review" that will shortly be submitted to the Journal "Living Reviews in General Relativity". Constructive comments are welcome

Analogue models of (and for) gravity have a long and distinguished history dating back to the earliest years of general relativity. In this review article we will discuss the history, aims, results, and future prospects for the various analogue models. We start the discussion by presenting a particularly simple example of an analogue model, before exploring the rich history and complex tapestry of models discussed in the literature. The last decade in particular has seen a remarkable and sustained development of analogue gravity ideas, leading to some hundreds of published articles, a workshop, two books, and this review article. Future prospects for the analogue gravity programme also look promising, both on the experimental front (where technology is rapidly advancing) and on the theoretical front (where variants of analogue models can be used as a springboard for radical attacks on the problem of quantum gravity).
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We then move on to discuss the basic principles of analogue gravity. We explain how the underlying physical ideas can be applied to a wide variety of physical systems. We also consider the general mathematical techniques needed in order to develop an analogue model, and explain how they can be used to construct the equations of motion for such models. Finally, we discuss some of the most promising applications of analogue models, including the so-called “quantum acoustic” effects, the “fluid analogue” of general relativity, and the various “analogue black holes”. This review article is intended as a comprehensive introduction to the field of analogue gravity. It should be of interest to both theorists and experimentalists, as well as those with a more general interest in the interface between general relativity and quantum theory.

Related to Analogue Gravity: History, Models and Prospects

1. What is analogue gravity?

Analogue gravity is a branch of physics that studies physical systems that mimic or simulate the behavior of gravity in a curved spacetime, even though they are not actually governed by the laws of general relativity. These systems are often referred to as "analogue models" or "analogue spacetimes."

2. How is analogue gravity related to general relativity?

Analogue gravity is inspired by the principles of general relativity, but it does not rely on the same mathematical framework. Instead, it uses concepts from other areas of physics, such as fluid mechanics, condensed matter physics, and quantum field theory, to create analogues of gravity. These analogues allow scientists to study and understand complex phenomena related to gravity in a more accessible and controllable setting.

3. What types of systems are used to study analogue gravity?

There are several types of systems that can be used to study analogue gravity, including flowing fluids, acoustic waves, and Bose-Einstein condensates. These systems are chosen because they exhibit similar behaviors to gravity, such as the formation of vortices and shock waves, and can be manipulated and studied in a laboratory setting.

4. What are some potential applications of analogue gravity?

Analogue gravity has the potential to provide new insights into the behavior of gravity in extreme conditions, such as black holes and the early universe. It may also have applications in other areas of physics, such as quantum gravity, cosmology, and condensed matter physics. Additionally, some scientists believe that analogue gravity could lead to the development of new technologies, such as improved sensors and detectors.

5. What are the prospects for future research in analogue gravity?

Analogue gravity is a relatively new field of study, and there is still much to be explored and understood. Scientists are continually developing new analogue models and techniques to better understand the behavior of gravity. As technology advances, it is likely that we will see even more sophisticated and accurate analogue models being developed, leading to exciting new discoveries and applications.

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