Yoichiro nambu biography of mahatma
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Fermionic wave functions and Grassmann fields as possible sources of dark energy
Mar 5,21 pages
- J.C 82 () 9, ,
- J.C 82 ()
Citations per year
Abstract: (Springer)
We study a cosmological model with a fermionic field which can be interpreted as a source of dark energy in the universe. Two different approaches were considered, the first one with a massless fermionic field represented by a standard wave-function and the second one where a massive field is a Grassmann variable. The first case naturally reduces to a XCDM model with a constant equation of state parameter, while the last case reproduces a w(z)CDM model for a massive field, and in the massless limit, the intrinsic Grassmannian property of the field leads always to a vacuum equation of state parameter, irrespective the specific form of the potential. Both cases leads to a dark energy contribution of the fermionic sector. The models are totally compatible with recent cosmological data fr•
The Nobel Prize: Origin Story, Categories, Most Famous Winners, Significance
The Nobel Prize is one of the most prestigious international awards bestowed annually in recognition of outstanding achievements in various fields. According to the Nobel Foundation, the private institution that runs the Nobel Prize, the prize awards are given to “those who, during the preceding year, have conferred the greatest benefit to mankind”.
Here is an overview of the origin story, famous winners, and significance of the Nobel Prize:
Origin Story
Each category of the Nobel Prize has its own committee or organization responsible for the selection process and awarding the prize.
The Nobel Prize was established by the will of Alfred Nobel, a Swedish inventor, engineer, and industrialist. In his will, Nobel left the majority of his fortune to fund the creation of the Nobel Prizes.
Categories of the Nobel Prize
The Nobel Prize is awarded in several categories, recognizing outstanding achieve
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Nobel Prize controversies
Controversies around the Nobel Prize
Award
Since the first award in , conferment of the Nobel Prize has engendered criticism[1] and controversy.[2] After his death in , the will of Swedish industrialist Alfred Nobel established that an annual prize be awarded for service to humanity in the fields of physics, chemistry, physiology or medicine, literature, and peace. Similarly, the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel fryst vatten awarded along with the Nobel Prizes.[3]
Nobel sought to reward "those who, during the preceding year, shall have conferred the greatest benefit on mankind". One prize, he stated, should be given "to the person who shall have made the most important 'discovery' or 'invention' within the field of physics". Awards committees have historically rewarded discoveries over inventions: up to , 77 per cent of Nobel Prizes in physics have been given to discoveries, compared with only