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Unconventional phases in quantum spi...

Xu, Cenke.

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Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices./
Author:	Xu, Cenke.
Description:	233 p.
Notes:	Adviser: Joel E. Moore.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Physics, Condensed Matter. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275658
ISBN:	9780549171409

Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices.
Xu, Cenke.

Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices. - 233 p.

Adviser: Joel E. Moore.

Thesis (Ph.D.)--University of California, Berkeley, 2007.

Several examples of quantum spin systems and pseudo spin systems have been studied, and unconventional states of matters and phase transitions have been realized in all these systems under consideration.

ISBN: 9780549171409Subjects--Topical Terms:

1018743
Physics, Condensed Matter.

Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices.
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020 $a 9780549171409
035 $a (UMI)AAI3275658
035 $a AAI3275658
040 $a UMI $c UMI
100 1 $a Xu, Cenke. $3 1266236
245 1 0 $a Unconventional phases in quantum spin and pseudospin systems in two dimensional and three dimensional lattices.
300 $a 233 p.
500 $a Adviser: Joel E. Moore.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5312.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2007.
520 $a Several examples of quantum spin systems and pseudo spin systems have been studied, and unconventional states of matters and phase transitions have been realized in all these systems under consideration.
520 $a In the p +/- ip superconductor Josephson lattice and the p--band cold atomic system trapped in optical lattices, novel phases which behave similarly to 1+1 dimensional systems are realized, despite the fact that the real physical systems are in two or three dimensional spaces. For instance, by employing a spin-wave analysis together with a new duality transformation, we establish the existence and stability of a novel gapless "critical phase", which we refer to as a "bond algebraic liquid". This novel critical phase is analogous to the 1+1 dimensional algebraic boson liquid phase. The reason for the novel physics is that there is a quasilocal gauge symmetry in the effective low energy Hamiltonian.
520 $a In a spin-1 system on the kagome lattice, and a hard-core boson system on the honeycomb lattice, the low energy physics is controlled by two components of compact U(1) gauge symmetries that emerge at low energy. Making use of the confinement nature of the 2+1 dimensional compact gauge theories and the powerful duality between gauge theories and height field theories, the crystalline phase diagrams are studied for both systems, and the transitions to other phases are also considered. These phase diagrams might be accessible in strongly correlated materials, or atomic systems in optical lattices.
520 $a A novel quantum ground state of matter is realized in a bosonic model on three dimensional fcc lattice with emergent low energy excitations. The novel phase obtained is a stable gapless boson liquid phase, with algebraic boson density correlations. The stability of this phase is protected against the instanton effect and superfluidity by self-duality and large gauge symmetries on both sides of the duality. The gapless collective excitations of this phase closely resemble the graviton, although they have a soft w &sim; k2 dispersion relation. The dynamics of this novel phase is described by a new set of Maxwell's equations.
590 $a School code: 0028.
650 4 $a Physics, Condensed Matter. $3 1018743
650 4 $a Physics, Theory. $3 1019422
690 $a 0611
690 $a 0753
710 2 $a University of California, Berkeley. $3 687832
773 0 $t Dissertation Abstracts International $g 68-08B.
790 $a 0028
790 1 0 $a Moore, Joel E., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275658