Quantum criticality in the (Cr98.4Al1.6)100-Mo alloy system
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Alloys and Compounds"
DOI: 10.1016/j.jallcom.2019.04.144
Abstract: Abstract Indications of quantum critical behaviour (QCB), driven by electron-hole pair breaking effects through Mo doping of Cr98.4Al1.6 are reported. Previous studies on the electrical resistivity ( ρ ) , Seebeck coefficient ( S )… read more here.
Keywords: system; alloy system; 4al1 100; cr98 4al1 ... See more keywords
Giant isotropic magneto-thermal conductivity of metallic spin liquid candidate Pr2Ir2O7 with quantum criticality
Sign Up to like & getrecommendations! Published in 2021 at "Nature Communications"
DOI: 10.1038/s41467-020-20562-w
Abstract: Spin liquids are exotic states with no spontaneous symmetry breaking down to zero-temperature because of the highly entangled and fluctuating spins in frustrated systems. Exotic excitations like magnetic monopoles, visons, and photons may emerge from… read more here.
Keywords: spin; metallic spin; spin liquid; quantum criticality ... See more keywords
Competing coherent and dissipative dynamics close to quantum criticality
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.100.052108
Abstract: We investigate the competition of coherent and dissipative dynamics in many-body systems at continuous quantum transitions. We consider dissipative mechanisms that can be effectively described by Lindblad equations for the density matrix of the system.… read more here.
Keywords: coherent dissipative; competing coherent; dissipative dynamics; quantum criticality ... See more keywords
Measurement-induced quantum criticality under continuous monitoring
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.054302
Abstract: We investigate entanglement phase transitions from volume-law to area-law entanglement in a quantum many-body state under continuous position measurement on the basis of the quantum trajectory approach. We find the signatures of the transitions as… read more here.
Keywords: criticality; measurement induced; quantum criticality; induced quantum ... See more keywords
Quantum criticality preempted by nematicity
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.103.165129
Abstract: Exotic physics often emerges around quantum criticality in metallic systems. Here we explore the nature of topological phase transitions between 3D double-Weyl semimetals and insulators (through annihilating double-Weyl nodes with opposite chiralities) in the presence… read more here.
Keywords: double weyl; nematicity; semimetals insulators; quantum criticality ... See more keywords
Self-duality protected multicriticality in deconfined quantum phase transitions
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
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
Scaling of the disorder operator at (2+1)d U(1) quantum criticality
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.l081109
Abstract: Yan-Cheng Wang,1 Meng Cheng,2, ∗ and Zi Yang Meng3, † 1School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China 2Department of Physics, Yale University, New Haven, CT 06520-8120, U.S.A… read more here.
Keywords: physics; scaling disorder; disorder operator; quantum criticality ... See more keywords
Quantum criticality in the coupled two-leg spin ladder Ba 2 CuTeO 6
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.184430
Abstract: We report on zero-field muon spin rotation, electron-spin resonance, and polarized Raman scattering measurements of the coupled quantum spin ladder ${\mathrm{Ba}}_{2}{\mathrm{CuTeO}}_{6}$. Zero-field muon spin rotation and electron-spin resonance probes disclose a successive crossover from a… read more here.
Keywords: spin ladder; spin; mathrm; cuteo ... See more keywords
Quantum criticality of bosonic systems with the Lifshitz dispersion
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.085140
Abstract: We study the quantum criticality of the Lifshitz $\varphi^4$-theory below the upper critical dimension. Two fixed points, one Gaussian and the other non-Gaussian, are identified with zero and finite interaction strengths, respectively. At zero temperature… read more here.
Keywords: chemical potential; bosonic systems; quantum criticality; interaction ... See more keywords
Quadrupolar quantum criticality on a fractal
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.184430
Abstract: We study the ground state ordering of quadrupolar ordered $S=1$ magnets as a function of spin dilution probability $p$ on the triangular lattice. In sharp contrast to the ordering of $S=1/2$ dipolar N\'eel magnets on… read more here.
Keywords: criticality fractal; quadrupolar quantum; criticality; quantum criticality ... See more keywords
In- and out-of-equilibrium quantum metrology with mean-field quantum criticality.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review. E"
DOI: 10.1103/physreve.101.052107
Abstract: We study the influence that collective transition phenomena have on quantum metrological protocols. The single spherical quantum spin (SQS) serves as stereotypical toy model that allows analytical insights on a mean-field level. First, we focus… read more here.
Keywords: quantum criticality; metrology; mean field; quantum ... See more keywords