Tunable deconfined quantum criticality and interplay of different valence-bond solid phases
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DOI: 10.1088/1674-1056/ab889b
Abstract: We use quantum Monte Carlo simulations to study a quantum $S=1/2$ spin model with competing multi-spin interactions. We find a quantum phase transition between a columnar valence-bond solid (cVBS) and a Neel antiferromagnet (AFM), as… read more here.
Keywords: deconfined quantum; bond solid; valence bond; transition ... See more keywords
Self-duality protected multicriticality in deconfined quantum phase transitions
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DOI: 10.1103/physrevb.104.205142
Abstract: Duality places an important constraint on the renormalization group flows and the phase diagrams. For self-dual theories, the self-duality can be promoted as a symmetry, this leads to the multicriticalities. This work investigates a description… read more here.
Keywords: duality; deconfined quantum; self duality; quantum criticality ... See more keywords
Higher-rank deconfined quantum criticality at the Lifshitz transition and the exciton Bose condensate
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DOI: 10.1103/physrevb.98.125105
Abstract: Deconfined quantum critical points are characterized by the presence of an emergent gauge field and exotic fractionalized particles, which exist as well-defined excitations only at the critical point. We here demonstrate the existence of quantum… read more here.
Keywords: theory; deconfined quantum; quantum critical; bose condensate ... See more keywords
Ising ferromagnet to valence bond solid transition in a one-dimensional spin chain: Analogies to deconfined quantum critical points
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.075103
Abstract: We study a one-dimensional (1D) system that shows many analogies to proposed two-dimensional (2D) deconfined quantum critical points (DQCP). Our system is a translationally invariant spin-1/2 chain with onsite Z_2×Z_2 symmetry and time-reversal symmetry. It… read more here.
Keywords: critical points; quantum critical; deconfined quantum; symmetry ... See more keywords
Deconfined quantum critical point in one dimension
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.165143
Abstract: We perform a numerical study of a spin-1/2 model with $\mathbb{Z}_2 \times \mathbb{Z}_2$ symmetry in one dimension which demonstrates an interesting similarity to the physics of two-dimensional deconfined quantum critical points (DQCP). Specifically, we investigate… read more here.
Keywords: one dimension; quantum critical; deconfined quantum; phase ... See more keywords
Adventure in Topological Phase Transitions in 3+1 -D: Non-Abelian Deconfined Quantum Criticalities and a Possible Duality
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review X"
DOI: 10.1103/physrevx.9.021034
Abstract: Continuous quantum phase transitions that are beyond the conventional paradigm of fluctuations of a symmetry breaking order parameter are challenging for theory. These phase transitions often involve emergent deconfined gauge fields at the critical points… read more here.
Keywords: theory; non abelian; deconfined quantum; phase transitions ... See more keywords