Miguel Alcubierre
Encyclopedia
Miguel Alcubierre Moya is a Mexican
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 theoretical physicist. Born in Mexico City
Mexico City
Mexico City is the Federal District , capital of Mexico and seat of the federal powers of the Mexican Union. It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole...

, he obtained a degree in physics
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...

, and a Master of Science
Master of Science
A Master of Science is a postgraduate academic master's degree awarded by universities in many countries. The degree is typically studied for in the sciences including the social sciences.-Brazil, Argentina and Uruguay:...

 in theoretical physics
Theoretical physics
Theoretical physics is a branch of physics which employs mathematical models and abstractions of physics to rationalize, explain and predict natural phenomena...

 at the School of Science of Universidad Nacional Autónoma de México (UNAM).

At the end of 1990, Alcubierre moved to Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 to attend graduate school
Graduate school
A graduate school is a school that awards advanced academic degrees with the general requirement that students must have earned a previous undergraduate degree...

 at the University of Wales, Cardiff
Cardiff University
Cardiff University is a leading research university located in the Cathays Park area of Cardiff, Wales, United Kingdom. It received its Royal charter in 1883 and is a member of the Russell Group of Universities. The university is consistently recognised as providing high quality research-based...

. He received his Ph.D.
Ph.D.
A Ph.D. is a Doctor of Philosophy, an academic degree.Ph.D. may also refer to:* Ph.D. , a 1980s British group*Piled Higher and Deeper, a web comic strip*PhD: Phantasy Degree, a Korean comic series* PhD Docbook renderer, an XML renderer...

 in the area of Numerical relativity
Numerical relativity
Numerical relativity is one of the branches of general relativity that uses numerical methods and algorithms to solve and analyze problems. To this end, supercomputers are often employed to study black holes, gravitational waves, neutron stars and many other phenomena governed by Einstein's Theory...

 in 1994. After leaving Wales in 1996, he worked at the Max Planck Institute for Gravitational Physics
Max Planck Institute for Gravitational Physics
The Max Planck Institute for Gravitational Physics is a Max Planck Institute whose research is aimed at investigating Einstein’s theory of relativity and beyond: Mathematics, quantum gravity, astrophysical relativity, and gravitational wave astronomy...

 in Potsdam
Potsdam
Potsdam is the capital city of the German federal state of Brandenburg and part of the Berlin/Brandenburg Metropolitan Region. It is situated on the River Havel, southwest of Berlin city centre....

, Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

, where he developed new numerical techniques to describe the physics of black hole
Black hole
A black hole is a region of spacetime from which nothing, not even light, can escape. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that...

s. Since 2002, he has worked at the Nuclear Sciences Institute of the National Autonomous University of Mexico
National Autonomous University of Mexico
The Universidad Nacional Autónoma de México is a university in Mexico. UNAM was founded on 22 September 1910 by Justo Sierra as a liberal alternative to the Roman Catholic-sponsored Royal and Pontifical University of Mexico The Universidad Nacional Autónoma de México (UNAM) (National Autonomous...

 (UNAM), where he conducts research in numerical relativity, employing computers to formulate and solve the physical equations first proposed by Albert Einstein
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

.

Alcubierre's solitary wave
Solitary wave
In mathematics and physics, a solitary wave can refer to* The solitary wave or wave of translation, as observed by John Scott Russell in the Union Canal, near Edinburgh in 1834...

 solutions of the Einstein field equations offer the unexpected possibility that general relativity
General relativity
General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics...

 may prove consistent with the experimentally verified non-locality of quantum mechanics
Quantum mechanics
Quantum mechanics, also known as quantum physics or quantum theory, is a branch of physics providing a mathematical description of much of the dual particle-like and wave-like behavior and interactions of energy and matter. It departs from classical mechanics primarily at the atomic and subatomic...

. This assuages the anticipation that quantum, non-locality would ultimately require abandoning the mathematical structure of relativity.

Alcubierre is best known for his May 1994 paper "The Warp Drive: Hyper-fast travel within general relativity" (which appeared in the science journal Classical and Quantum Gravity). In this, he describes the Alcubierre drive
Alcubierre drive
The Alcubierre drive, also known as the Alcubierre metric, is a speculative, but valid solution of the Einstein field equations. It is a mathematical model of a spacetime exhibiting features reminiscent of the fictional "warp drive" from Star Trek, which can travel "faster than light", although...

, a theoretical means of traveling faster than light that does not violate the physical principle that nothing can locally travel faster than light.

In his paper, he reversed the regular way general relativity is applied; instead of going from massive objects to space-time curvature, he constructed a model that could transport a volume of flat space inside a "bubble" of highly curved space, much like a crease in a sheet. This bubble is driven forward by a purely local expansion of space-time behind it, and an opposite contraction in front of it. In this way, a spaceship
Spacecraft
A spacecraft or spaceship is a craft or machine designed for spaceflight. Spacecraft are used for a variety of purposes, including communications, earth observation, meteorology, navigation, planetary exploration and transportation of humans and cargo....

 will be pushed away from the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

 and pulled towards a distant star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 by space-time itself. One can then invert the process to come back to Earth, taking an arbitrarily small time to complete the round trip. As a result, motion faster than light as seen by observers outside this disturbed region is possible. Faster than light velocity would be possible because the starship would be, strictly speaking, stationary (relative to the space of its bubble) while space-time itself would be moving.

The key to generate a distortion of spacetime like that is the so-called "exotic matter
Exotic matter
In physics, exotic matter is a term which refers to matter which would somehow deviate from the norm and have "exotic" properties. There are several uses of the term....

". Exotic matter has the provoking property of having negative energy density
Energy density
Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume. Often only the useful or extractable energy is quantified, which is to say that chemically inaccessible energy such as rest mass energy is ignored...

. (While two "normal" particle
Subatomic particle
In physics or chemistry, subatomic particles are the smaller particles composing nucleons and atoms. There are two types of subatomic particles: elementary particles, which are not made of other particles, and composite particles...

s would attract each other by their gravity, an exotic particle would repel a "normal" particle.)

Miguel Alcubierre also made a special appearance on the TV productions "How William Shatner Changed the World" and Michio Kaku's "Sci-Fi Science", in which his warp bubble theory was discussed. Further mentioned on the Star Trek Memory Alpha article http://www.memory-alpha.org/en/index.php/How_William_Shatner_Changed_the_World
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