- PSI Researchers Seek Existence of Exotic Quantum Spin Ice.
- Quantum Spin Ice: Pyrochlore Quantum Magnet Tb2Ti2O7 at Ultra-Low.
- Spinon Walk in Quantum Spin Ice | PIRSA.
- (PDF) Quantum Excitations in Quantum Spin Ice - ResearchGate.
- Quantum Spin Ice: A Search for Gapless Quantum Spin Liquids in.
- Fingerprints of quantum spin ice in Raman scattering.
- PDF Topological Superconductivity in Metal/Quantum-Spin-Ice Heterostructures.
- Spin Ice | SpringerLink.
- Vindication of Yb2Ti2O7 as a model exchange quantum spin ice.
- Quantum ice: a quantum Monte Carlo study. - Abstract - Europe PMC.
- Synthesis, floating zone crystal growth and... - ScienceDirect.
- "Quantum spin liquid": Scientists squeeze water into a new.
- PDF Spin Ice and Quantum Spin Liquid in Geometrically Frustrated Magnets.
PSI Researchers Seek Existence of Exotic Quantum Spin Ice.
We implemented a two-dimensional (2D) spin ice of superconducting qubits—macroscopic quantum objects ( 14 )—in a quantum annealing (QA) system and drove it between low-energy quasi-classical states by means of primarily quantum rather than thermal fluctuations, thus opening the door to future studies of quantum phases in these systems ( 15, 16 ). The quantum spin ice system is distinguished by its much lower current damping rate than the classical spin ice systems. κ ( ω ) can be fitted to equation (1), which contains three independent. Quantum spin ice is a type of U(1) quantum spin liquid which might be observed in certain pyrochlore magnets. A U (1) spin liquid in three dimensions is a collective paramagnetic phase of matter with fractionalized excitations at low energy that are gapless , with linear dispersion ω ~ | k | and with two transverse polarizations.
Quantum Spin Ice: Pyrochlore Quantum Magnet Tb2Ti2O7 at Ultra-Low.
With experimental work demonstrating that the correlated ground state of the pyrochlore system Ce 2 Sn 2 O 7 is a quantum liquid of magnetic octupoles, an international team led by PSI researcher Romain Sibille establishes a fundamentally new state of matter: higher-rank multipole ice.. Spin ice is an intriguing state of matter. If magnetic moments are suitably arranged in a crystal structure.
Spinon Walk in Quantum Spin Ice | PIRSA.
Dep. Phys. Astron., Univ. Waterloo, Waterloo, Ont. N2L 3G1, Can. Search for more papers by this author. The neutron scattering response from Yb 2 Ti 2 O 7, a “quantum spin ice” material possibly on the edge of being a quantum spin liquid. If the material was conventional, the energy and momentum transfer of the neutrons is expected to show well-defined lines as in the left panel (calculation), but instead we see a “continuum” of.
(PDF) Quantum Excitations in Quantum Spin Ice - ResearchGate.
In view of the small size of its constrained Hilbert space, this marks out quantum spin ice as an ideal platform for studying exotic quantum field theories and a target for quantum simulation. The large α QSI implies that experiments probing candidate condensed-matter realizations of quantum spin ice should expect to observe phenomena arising. Synthesis, floating zone crystal growth and characterization of the quantum spin ice Pr 2 Zr 2 O 7 pyrochlore. Author links open overlay panel S.M. Koohpayeh a J.-J. Wen a B.A. Trump a b C.L. Broholm a T.M. McQueen a b. Show more.... Spin ice. B1. Pr 2 Zr 2 O 7. A1. Pyrochlore non-stoichiometry. 1. Introduction. Quantum Spin Ice: Pyrochlore Quantum Magnet Tb2Ti2O7 at Ultra-Low Temperatures font size decrease font size increase font size; Print; New research at the lab's High B/T facility supports the proposal that the disordered ground state of terbium titanate is a quantum spin ice.
Quantum Spin Ice: A Search for Gapless Quantum Spin Liquids in.
Motivated by the rapid experimental progress of quantum spin ice materials, we study the dynamical properties of pyrochlore spin ice in the U(1) spin liquid phases. In particular, we focus on the spinon excitations that appear in high energies and show up as an excitation continuum in the dynamic spin structure factor. The keen connection. Quantum Excitations in Quantum Spin Ice Kate A. Ross 1 , Lucile Savary 2 , Bruce D. Gaulin 1 , 3 , 4 & Leon Balents 5 , ∗ 1 Department of Physics and Astronomy , McMaster University , Hamilton.
Fingerprints of quantum spin ice in Raman scattering.
Quantum spin ice, modeled for magnetic rare-earth pyrochlores, has attracted great interest for hosting a U(1) quantum spin liquid, which involves spin-ice monopoles as gapped deconfined spinons, as well as gapless excitations analogous to photons. However, the global phase diagram under a [111] magnetic field remains open.. Emergent Fine Structure Constant of Quantum Spin Ice Is Large. Authors: Pace, Salvatore D.; Morampudi, Siddhardh C.; Moessner, Roderich; Laumann, Chris R. Award ID(s): 1752727 Publication Date: 2021-09-01 NSF-PAR ID: 10339570 Journal Name: Physical Review Letters Volume: 127 Issue: 11 ISSN: 0031-9007..
PDF Topological Superconductivity in Metal/Quantum-Spin-Ice Heterostructures.
LOS ALAMOS, N.M., July 15, 2021—Using a D-Wave quantum-annealing computer as a testbed, scientists at Los Alamos National Laboratory have shown that it is possible to isolate so-called emergent magnetic monopoles,... They realized an artificial spin ice by using the superconducting qubits of the quantum machine as a magnetic building block. We develop a theory of the dynamical response of a minimal model of quantum spin ice (QSI) by means of inelastic light scattering. In particular, we are interested in the Raman response of the fractionalized U(1) spin liquid realized in the XXZ QSI.We show that the low-energy Raman intensity is dominated by spinon and gauge fluctuations.
Spin Ice | SpringerLink.
This vindicates Yb2Ti2O7 as a model quantum spin ice. We find that in the perturbative weak quantum regime, such a system has a ferrimagnetic ordered ground state, with two peaks in C(T): a Schottky anomaly signaling the paramagnetic to spin ice crossover, followed at a lower temperature by a sharp peak accompanying a first-order phase. Of a classical spin liquid, i.e., a spin ice. Spin ices have been realized ex-perimentally (e.g., Dy 2Ti 2O 7) and exhibit magnetic monopoles. At very low temperatures, however, other terms may become relevant in the Hamiltonian (e.g., a stray eld) which cause the spins to either order or form a spin glass. Figure 1: AF Ising spins on a.
Vindication of Yb2Ti2O7 as a model exchange quantum spin ice.
The Coulombic quantum spin liquid in quantum spin ice is an exotic quantum phase of matter that emerges on the pyrochlore lattice and is currently actively searched for. Motivated by recent experiments on the Yb-based breathing pyrochlore material Ba[subscript 3] Yb[subscript 2] Zn[subscript 5] O[subscript 11], we theoretically study the phase.
Quantum ice: a quantum Monte Carlo study. - Abstract - Europe PMC.
The quantum spin ice (QSI), a type of quantum spin liquid (QSL) where spin ice configurations tunnel among themselves, is a generalisation of the classical "spin ice" (CSI) integrating quantum fluctuations. Whereas in CSI the excitations are akin to charges with a mutual Coulomb interaction, in the QSI these charges interact through a. Ice states, in which frustrated interactions lead to a macroscopic ground-state degeneracy, occur in water ice, in problems of frustrated charge order on the pyrochlore lattice, and in the family of rare-earth magnets collectively known as spin ice. Of particular interest at the moment are "quantum.
Synthesis, floating zone crystal growth and... - ScienceDirect.
We formulate quantum feedback control as a problem of stochastic nonlinear control by considering separately a quantum filtering problem and a state feedback control problem for the filter. We explore the use of stochastic Lyapunov techniques for the design of feedback controllers for quantum spin systems and demonstrate the possibility of.
"Quantum spin liquid": Scientists squeeze water into a new.
In the presence of quantum fluctuations, one can obtain, in principle, a quantum spin liquid descended from the classical spin ice state characterised by emergent photon-like excitations. Whereas in classical spin ices the excitations are akin to electrostatic charges, in the quantum spin liquid these charges interact through a dynamic and. Instead our low energy inelastic neutron scattering measurements show a dynamic quantum spin ice state, with suppressed scattering near Q = 0, and no long range order at low temperatures. This is consistent with recent theory predicting symmetry enriched U(1) quantum spin liquids for such DO doublets decorating the pyrochlore lattice.
PDF Spin Ice and Quantum Spin Liquid in Geometrically Frustrated Magnets.
An overview of an exotic type of liquid. Materials with interacting quantum spins that nevertheless do not order magnetically down to the lowest temperatures are candidates for a materials class called quantum spin liquids (QSLs). QSLs are characterized by long-range quantum entanglement and are tricky to study theoretically; an even more. Quantum spin ice is a frustrated magnet that displays rich emergent phenomena. For example, the magnetic moments carried by the spins may separate into mobile magnetic charges, producing quantum fractional excitations known as spinons. The spinon moves in a background of disordered spins, and its motion is strongly coupled to the spin.
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