Approximate ground state in a model with spontaneous symmetry breakdown |
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Authors: | J Ho?ek |
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Institution: | (1) Nuclear Physics Institute, Czechosl. Acad. Sci., e , 250 68 e near, Prague, Czechoslovakia |
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Abstract: | The spontaneous symmetry breakdown is treated by means of a variational approach. Use is made of coherent states of Glauber and of pairing states of BCS-type as the translationally invariant vacuum states for the discussion of the real scalar field ![lambda](/content/t68j531p0881863v/xxlarge955.gif) 4 withm
0
2
0. The first type of trial states reproduces the usual approach to spontaneous symmetry breakdown (![phiv](/content/t68j531p0881863v/xxlarge981.gif) - ) in the tree approximation (which is possible only form
0
2
<0), while the second type of trial states offers the possibility of spontaneous symmetry breakdown even form
0
2
=0. |
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Keywords: | |
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