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Home > Zero-point energy


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In a quantum mechanical system such as the particle in a box or the quantum harmonic oscillator, the lowest possible energy is called the zero-point energy.

1 Existence

Does electromagnetic zero-point energy exist, and if so, are there any practical applications and does it have any connection with dark energy? The theoretical basis for electromagnetic zero-point energy is clear. According to Sciama (1991):

"Even in its ground state, a quantum system possesses fluctuations and an associated zero-point energy, since otherwise the uncertainty principle would be violated. In particular the vacuum state of a quantum field has these properties. For example, the electric and magnetic fields in the electromagnetic vacuum are fluctuating quantities."

The Casimir effect is an example of a one-loop effect in quantum electrodynamics that can be simply explained by the zero-point energy.

2 History

The concept of zero-point energy originated with Max Planck in 1911. The average energy of a harmonic oscillator in this hypothesis is (where is Planck's constant and is frequency):

At the same time Einstein and Hopf ( 1910) and Einstein and Stern ( 19131913 is a common year starting on Wednesday. click on link for calendar) Events January-March January 30 House of Lords rejects Irish Home Rule Bill February 1 New York City's Grand Central Station opens as the world's largest train station. February 3 Th) were also studying the properties of zero-point energy. Shortly thereafter Nernst ( 19161916 is a leap year starting on Saturday (link will take you to calendar) Events January 1 -The first successful blood transfusion using blood that had been stored and cooled. Impressionist Monet paints Water Lilies'. January 8 Allied forces withdraw from) proposed that empty space was filled with zero-point electromagnetic radiationElectromagnetic radiation is a combination of oscillating electric and magnetic fields in perpendicular orientation to each other, moving through space, effectively transporting energy from one place to another. Visible light is a form of electromagnetic. Then in 1925Centuries: 19th century 20th century 21st century Decades: 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s Years: 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 See also 1925 in aviation 1925 in film 1925 in literature 1925 in mu the existence of zero-point energy was shown to be “required by quantum mechanics, as a direct consequence of Heisenberg's uncertainty principle” (Sciama 19911991 like 2002, is a palindromic year. It also has the same calendar as 2002, including Easter on March 31. It is a common year starting on Tuesday. Events January January 2 Sharon Pratt Dixon is sworn in as mayor of Washington, DC becoming the first blac). As any textbook on quantum opticsQuantum optics is a field of research in physics, dealing with the application of quantum mechanics to phenomena involving light and its interactions with matter. History of Quantum Optics Light is made up of particles and hence inherently "grainy"; quant will show (e.g. Loudon 1983), the way to quantize the electromagnetic field is to associate each mode of the field with a harmonic oscillator with the result that the minimum energy per mode of the electromagnetic quantum vacuum is .



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