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Quantum criticality in an Ising chain: experimental evidence for emergent E8 symmetry.

Abstract:

Quantum phase transitions take place between distinct phases of matter at zero temperature. Near the transition point, exotic quantum symmetries can emerge that govern the excitation spectrum of the system. A symmetry described by the E8 Lie group with a spectrum of eight particles was long predicted to appear near the critical point of an Ising chain. We realize this system experimentally by using strong transverse magnetic fields to tune the quasi-one-dimensional Ising ferromagnet CoNb2O6 (...

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Publication status:
Published

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Publisher copy:
10.1126/science.1180085

Authors


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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Tennant, DA More by this author
Wheeler, EM More by this author
Wawrzynska, E More by this author
Prabhakaran, D More by this author
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Journal:
Science (New York, N.Y.)
Volume:
327
Issue:
5962
Pages:
177-180
Publication date:
2010-01-05
DOI:
EISSN:
1095-9203
ISSN:
0036-8075
URN:
uuid:f67d60f9-f309-4f3e-b4fd-67b64430002a
Source identifiers:
155079
Local pid:
pubs:155079
Language:
English
Keywords:

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