Quantum Levitation
Laura Mikelevičiūtė
QUANTUM LEVITATION. ITS DIFFICULTIES AND PROBLEMS
INTRODUCTION
The main objective of my research is difficulties and problems of using Quantum levitation for society needs. This summary will introduce the capacity of superconductivity and how it influences human health.
KEY TERMS
Super conductivity - materials that conduct electricity with no resistance. This means that unlike the more familiar conductors such as copper or steel a superconductor can carry a current indefinitely without losing any energy. They also have several other very important properties such as the fact that no magnetic field can exist within a superconductor.
Meissner effect - the expulsion of magnetic flux when a material becomes superconducting in a magnetic field.
Quantum physics -Quantum physics is necessary to understand the properties of solids, atoms, nuclei, subnuclear particles and light. In order to understand these natural phenomena, quantum principles have required fundamental changes in how humans view nature.
Magnetic field - a region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Maglev trains – trains that float/levitate on a cushion of air above ground without any direct physical contact with the guidway/track, and thus avoid any friction normally involved in the movement of traditional trains.
Phenomenon - extraordinary occurrence or circumstance.
SUMMARY
Quantum levitation (sourse, year) as it is called is a process where scientists use the properties of quantum physics to levitate an object (specifically, a superconductor) over a magnetic source (specifically a quantum levitation track designed for this purpose). Superconductors and magnetic field ‚don‘t like each other‘ and pushes one another. This phenomenon is called the Meissner effect. Because of this process, superconductor can levitate. If you just placed a superconductor on top of a magnet, then the superconductor would just float off the magnet, sort of like trying to balance two south magnetic poles of bar magnets against each other. Floating superconductor could hold much more than its own weight. For example, super-thin 3-inch disk levitate something 70,000 times its own weight. . It is very beneficial to use because the superconductor is able to maneuver without almost any loss of energy. But how humanity can use this phenomenon for their needs? For instance, Japan (sourse, year) has already used Quantum levitation for transport. Japan resumed high speed tests on experimental magnetic levitation train in early 2013. Unfortunately, the current intensity of this effect is such that we will not have flying cars for quite some time, because of a umber of reasons (sourse, year).
- First of all, this Quantum levitation process would only work if the magnetic field is very strong. Also, magnetic field decreases, so it has to be changed from time to time.
- Secondly, superconductor must reach its critical temperature, which is usually very low and it is hard to create such setting.
- There is a difficulty of achieving stability in magnetic levitation. The levitated object (the bottom magnet) once displaced from its equilibrium position, should remain steady via restoration of force in all directions horizontally and vertically without any sideways slip. It is obvious that a delicate balance is required between the distance of the two magnets and the effective overall combined opposing forces of magnetic fields and gravity to achieve stable levitation of the object.
- Strong magnetic field is dangerous for human health. Magnetism is neither felt by the human senses in any obvious way nor there is any substantial evidence that it is harmful. Yet, it does have subtle effects on vision and heart performance.
Despite the fact, that there are some disadvantages of using Quantum levitation, the concept is known for years, the technology has now advanced enough to encourage commercial interest primarily in transportation. This phenomenon of Quantum physics is very perspective. It is believed that there would be floating cars, levitating trains at the end of this century because of this phenomenon.
REFERENCES
http://www.nytimes.com/1983/02/22/science/do-enormous-magnets-affect-the-human-body.html
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