Bipartite entanglements in spin–orbital systems

Chen, Dongmeng; Zou, Liang‐Jian

doi:10.1016/j.physleta.2010.01.021

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…Spin-orbital-like entanglement is also applicable to nuclear systems, where nucleons possess as well two degrees of freedom -spin and isospin. It has been established that the entanglement length of the nucleons is significantly larger than that one expects [78]. Entanglement may also play an important role in quantum computations if the spin state used for information storage would be measured by investigating orbital qubits in entangled states [127].…”

Section: Discussion and Summarymentioning

confidence: 99%

“…It is of importance that spin-orbital entanglement is related to local properties of spins and orbitals on a bond. Therefore the entanglement phase diagram of a finite system is in agrement with the magnetic and orbital phase diagram of the infinite SU(2)⊗SU(2) model [78].…”

Section: Entanglement In the Su(2)⊗su(2) Spin-orbital Modelmentioning

confidence: 99%

“…The second term H J is the spin-orbital superexchange model for the RVO 3 perovskites (13) introduced above in section 4.1. The first term in (78) describes the hopping of {a, b} electrons in the constrained Hilbert space, i.e., in the space with singly occupied (at the hole position) or doubly occupied sites. This means that the electrons in the ab plane, which is under consideration here, can hop only along the b (a) direction when they carry a (b) orbital flavour.…”

Section: Hole Propagation In a Mott Insulator With Coupled Spin-orbit...mentioning

confidence: 99%

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Fingerprints of spin–orbital entanglement in transition metal oxides

Oleś¹

2012

J. Phys.: Condens. Matter

124

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The concept of spin-orbital entanglement on superexchange bonds in transition metal oxides is introduced and explained on several examples. It is shown that spin-orbital entanglement in superexchange models destabilizes the long-range (spin and orbital) order and may lead either to a disordered spin-liquid state or to novel phases at low temperature which arise from strongly frustrated interactions. Such novel ground states cannot be described within the conventionally used mean field theory which separates spin and orbital degrees of freedom. Even in cases where the ground states are disentangled, spin-orbital entanglement occurs in excited states and may become crucial for a correct description of physical properties at finite temperature. As an important example of this behaviour we present spin-orbital entanglement in the RV O(3) perovskites, with R = La,Pr,…,Y b,Lu, where the finite temperature properties of these compounds can be understood only using entangled states: (i) the thermal evolution of the optical spectral weights, (ii) the dependence of the transition temperatures for the onset of orbital and magnetic order on the ionic radius in the phase diagram of the RV O(3) perovskites, and (iii) the dimerization observed in the magnon spectra for the C-type antiferromagnetic phase of Y V O(3). Finally, it is shown that joint spin-orbital excitations in an ordered phase with coexisting antiferromagnetic and alternating orbital order introduce topological constraints for the hole propagation and will thus radically modify the transport properties in doped Mott insulators where hole motion implies simultaneous spin and orbital excitations.

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Section: Discussion and Summarymentioning

confidence: 99%

Section: Entanglement In the Su(2)⊗su(2) Spin-orbital Modelmentioning

confidence: 99%

Section: Hole Propagation In a Mott Insulator With Coupled Spin-orbit...mentioning

confidence: 99%

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Fingerprints of spin–orbital entanglement in transition metal oxides

Oleś¹

2012

J. Phys.: Condens. Matter

124

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Improvement the design of microwave dual‐band BPF by DGS technique

Amiri

Khajavi

2016

Micro & Optical Tech Letters

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This article presents a new method for designing a dual‐band bandpass filter at microwave frequency with improvement on filter characteristics like bandwidth, in band insertion loss and outband and decrease the neutral harmonics on stopband with using defected ground structure (DGS) technique. The basic resonator, with a single passband, was designed using an open‐circuit capacitor‐coupled stripline resonator. An I‐shape architecture was employed at the middle part of the basic resonator to create a dual‐passband frequency response. Finally, the current density of the filter with DGS and without DGS is shown. Simulation results for the proposed filter include performance at 4.6 GHz and 7.3 GHz with respective bandwidths of 178 MHz and 155 MHz. Simulation results well match the characteristics of the fabricated filter. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2133–2137, 2016

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Bipartite entanglements in spin–orbital systems

Cited by 2 publications

References 24 publications

Fingerprints of spin–orbital entanglement in transition metal oxides

Fingerprints of spin–orbital entanglement in transition metal oxides

Improvement the design of microwave dual‐band BPF by DGS technique

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