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--- theorems:goldstones_theorem [2018/05/15 06:59]
jakobadmin
+++ theorems:goldstones_theorem [2018/05/15 07:00]
jakobadmin
@@ Line 111: / Line 111: @@
 <cite>http://www.jstor.org/stable/pdf/10.1086/518324.pdf</cite>
 </blockquote>
+----
+**Examples**
+--> Landau phonons in Bose-Einstein condensates#
+"The Bose-Einstein condensation is characterized by the
+breaking of a global U(1) gauge group (acting on the Bose particle field
+as the U(1) group of Example 1), as very clearly displayed by the free
+Bose gas.5 The U(1) breaking leads to the existence of Goldstone
+modes, the so-called Landau phonons, and the existence of such excitations
+may in turn indicate the presence of a broken U(1) symmetry" [[https://arxiv.org/pdf/1502.06540.pdf |Source]]
+<--
 ----
@@ Line 158: / Line 174: @@
 <cite>https://arxiv.org/pdf/1703.05448.pdf</cite>
 </blockquote>
-<tabbox Examples>
---> Landau phonons in Bose-Einstein condensates#
-"The Bose-Einstein condensation is characterized by the
-breaking of a global U(1) gauge group (acting on the Bose particle field
-as the U(1) group of Example 1), as very clearly displayed by the free
-Bose gas.5 The U(1) breaking leads to the existence of Goldstone
-modes, the so-called Landau phonons, and the existence of such excitations
-may in turn indicate the presence of a broken U(1) symmetry" [[https://arxiv.org/pdf/1502.06540.pdf |Source]]
-<--