Dissipative Magnetic Soliton in a Spinor Polariton Bose–Einstein Condensate

Magnetic soliton is an intriguing nonlinear topological excitation that carries magnetic charges while featuring a constant total density. So far, it has only been studied in the ultracold atomic gases with the framework of the equilibrium physics, where its stable existence crucially relies on a nearly spin-isotropic, antiferromagnetic, interaction. Here, we demonstrate that magnetic soliton can appear as the exact solutions of dissipative Gross–Pitaevskii equations in a linearly polarized spinor polariton condensate with the framework of the non-equilibrium physics, even though polariton interactions are strongly spin anisotropic. This is possibly due to a dissipation-enabled mechanism, where spin excitation decouples from other excitation channels as a result of gain-and-loss balance. Such unconventional magnetic soliton transcends constraints of equilibrium counterpart and provides a novel kind of spin-polarized polariton soliton for potential application in opto-spintronics.

Caged structural water molecules emit tunable brighter colors by topological excitation

Intrinsically, free water molecules are colorless liquid. If it is colorful, why and how does it emit the bright colors? We provided direct evidences that, when water was trapped into...

Topological Excitation of Singly Hydrated Hydroxide Complex in Confined Sub-Nanospace for Bright Color Emission and Heterogeneous Catalysis

<p>This excellent story answered two unresolved questions in the past one century and two centuries. The first one is that water is colored or noncolored (<b><i>Water as an Activator of Luminescence. Nature 1930, 125, 706-707</i></b>)? If it is colorful, why and how does it emit the bright colors? The second question is on the physical origin of catalysis or catalyst, i.e., the mysterious internal force of catalysis is what, and how this powerful force determines the chemical reactivity, including activity, selectivity and life times (or stability of catalyst)? (<b><i>A Brief History of Catalysis. CATTECH 2003, 7 (4), 130-138.</i></b>)</p> After reading this interesting story, both seemingly non-related two questions could be perfectly answered by topological excitation of singly hydrated hydroxide complex in confined sub-nanospace.

Topological Excitation of Singly Hydrated Hydroxide Complex in Confined Sub-Nanospace for Bright Color Emission and Heterogeneous Catalysis

<p>This excellent story answered two unresolved questions in the past one century and two centuries. The first one is that water is colored or noncolored (<b><i>Water as an Activator of Luminescence. Nature 1930, 125, 706-707</i></b>)? If it is colorful, why and how does it emit the bright colors? The second question is on the physical origin of catalysis or catalyst, i.e., the mysterious internal force of catalysis is what, and how this powerful force determines the chemical reactivity, including activity, selectivity and life times (or stability of catalyst)? (<b><i>A Brief History of Catalysis. CATTECH 2003, 7 (4), 130-138.</i></b>)</p> After reading this interesting story, both seemingly non-related two questions could be perfectly answered by topological excitation of singly hydrated hydroxide complex in confined sub-nanospace.

Bethe Ansatz for XXX chain with negative spin

[Formula: see text] spin chain with spin [Formula: see text] appears as an effective theory of Quantum Chromodynamics. It is equivalent to lattice nonlinear Schroediger’s equation: interacting chain of harmonic oscillators [bosonic]. In thermodynamic limit each energy level is a scattering state of several elementary excitations [lipatons]. Lipaton is a fermion: it can be represented as a topological excitation [soliton] of original [bosonic] degrees of freedom, described by the group [Formula: see text]. We also provide the CFT description (including local quenches) and Yang–Yang thermodynamics of the model.

Topological characterization of higher-dimensional charged Taub–NUT instantons

Recently, we have shown that non-selfdual self-gravitating dyonic fields with magnetic mass generalize the Dirac monopole. The unique topological index, which characterizes the field, is a four-dimensional analogue of the famous monopole configuration. An unexpected result of this analysis is that the electric parameter can only take certain discrete values as a consequence of applying the path integral approach to quantize the magnetic flux. Here, we show how this result can be generalized to higher dimensions, considering a special type of inhomogeneous geometries. Our results apply to a vast range of theories and situations in which topological charges are present. For concreteness, we focus here on Lovelock–Maxwell solutions and show that the magnetic flux corresponds to a topological excitation and the electric flux becomes discrete.

CREATION OPERATORS FOR TWO-BRANES AND DUALITY IN BF AND CHERN–SIMONS THEORIES IN D=5

We explicitly construct the creation operators for the quantum field configurations associated to quantum membranes (two-branes) in BF and generalized Chern–Simons theories in a space–time of dimension D=5. The creation operators for quantum excitations carrying topological charge are also obtained in the same theories. For the case of D=5 generalized Chern–Simons theory, we show that this operator actually creates an open string with a topological charge at its tip. It is shown that a duality structure exists in general, relating the membrane and topological excitation operators and the corresponding dual algebra is derived. Composite topologically charged membranes are shown to possess generalized statistics that may, in particular, be fermionic. This is the first step for the bosonization procedure in these theories. Potential applications in the full quantization of two-branes is also briefly discussed.