scholarly journals QUANTUM PHASES IN TWO-DIMENSIONAL FRUSTRATED SPIN-1/2 ANTIFERROMAGNETS

2002 ◽  
Author(s):  
P. SINDZINGRE ◽  
C. LHUILLIER ◽  
J.-B. FOUET
Keyword(s):  
Two Dimensional ◽  
Quantum Phases ◽  
Frustrated Spin

scholarly journals QUANTUM PHASES IN TWO-DIMENSIONAL FRUSTRATED SPIN-1/2 ANTIFERROMAGNETS

2003 ◽  
Vol 17 (28) ◽  
pp. 5031-5039 ◽  
Author(s):  
P. SINDZINGRE ◽  
C. LHUILLIER ◽  
J.-B. FOUET
Keyword(s):  
Long Range ◽  
Valence Bond ◽  
Range Order ◽  
Long Range Order ◽  
Two Dimensional ◽  
Spin Liquids ◽  
Quantum Phases ◽  
Quantum Antiferromagnets ◽  
Frustrated Spin

We describe four phases found in two-dimensional quantum antiferromagnets. Two of them display long range order at T = 0: the Néel state and the Valence Bond Crystal. The last two are Spin-Liquids. Properties of these different states are shortly described and likely conditions of their occurrence outlined.

scholarly journals Quantum phases of dipolar rotors on two-dimensional lattices

2018 ◽  
Vol 148 (10) ◽  
pp. 102338 ◽  
Author(s):  
B. P. Abolins ◽  
R. E. Zillich ◽  
K. B. Whaley
Keyword(s):  
Two Dimensional ◽  
Quantum Phases ◽  
Dipolar Rotors

Mapping of quantum phases by two-dimensional vibronic spectroscopy of wave-packet revivals

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
Alexander Schubert ◽  
Klaus Renziehausen ◽  
Volker Engel
Keyword(s):  
Wave Packet ◽  
Two Dimensional ◽  
Quantum Phases

scholarly journals Antiferromagnetic and Ferromagnetic Spintronics: Transport in the Two-dimensional Ferromagnet and the Role of In-chain and Inter-chain Interactions

2021 ◽  
Author(s):  
L. S. Lima
Keyword(s):  
Nearest Neighbor ◽  
Nearest Neighbors ◽  
Two Dimensional ◽  
Spin Correlations ◽  
Ferromagnetic Domain ◽  
Frustrated Spin ◽  
Ferromagnetic Domain Wall ◽  
Chain Interaction ◽  
The Continuum

Abstract Spin-transport and current-induced torques in ferromagnet heterostruc-tures given by a ferromagnetic domain wall are investigated. Furthermore , the continuum spin conductivity is studied in a frustrated spin system given by the two-dimensional Heisenberg model with ferromagnetic in-chain interaction J 1 < 0 between nearest neighbors and antiferromagnetic next-nearest-neighbor in-chain interaction J 2 > 0 with aim to investigate the effect of the phase diagram of the critical ion single anisotropy D c as a function of J 2 on conductivity. We consider the model with the moderate strength of the frustrating parameter such that in-chain spin-spin correlations that are predominantly ferromagnetic. In addition, we consider two inter-chain couplings J ⊥,y and J ⊥,z , corresponding to the two axes perpendicular to chain where ferromagnetic as well as antiferromagnetic interactions are taken into account.

scholarly journals Cooling and entangling ultracold atoms in optical lattices

Science ◽  
2020 ◽  
Vol 369 (6503) ◽  
pp. 550-553 ◽  
Author(s):  
Bing Yang ◽  
Hui Sun ◽  
Chun-Jiong Huang ◽  
Han-Yi Wang ◽  
Youjin Deng ◽  
...  
Keyword(s):  
Large Scale ◽  
Thermal Fluctuations ◽  
Two Dimensional ◽  
Many Body ◽  
Quantum Phases ◽  
Atom Pairs ◽  
Speed Up ◽  
Quantum Simulator ◽  
Many Body Systems ◽  
Qubit Gate

Scalable, coherent many-body systems can enable the realization of previously unexplored quantum phases and have the potential to exponentially speed up information processing. Thermal fluctuations are negligible and quantum effects govern the behavior of such systems with extremely low temperature. We report the cooling of a quantum simulator with 10,000 atoms and mass production of high-fidelity entangled pairs. In a two-dimensional plane, we cool Mott insulator samples by immersing them into removable superfluid reservoirs, achieving an entropy per particle of 1.9−0.4+1.7×10−3kB. The atoms are then rearranged into a two-dimensional lattice free of defects. We further demonstrate a two-qubit gate with a fidelity of 0.993 ± 0.001 for entangling 1250 atom pairs. Our results offer a setting for exploring low-energy many-body phases and may enable the creation of large-scale entanglement.

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