We review ground states and excitations of a quantum antiferromagnet on triangular and
other frustrated lattices. We pay special attention to the combined effects of magnetic field h …

Abstract Quantum spin-1/2 kagome Heisenberg antiferromagnet is the representative
frustrated system possibly hosting a spin liquid. Clarifying the nature of this elusive …

Abstract A spin-1/2 triangular-lattice Heisenberg antiferromagnet (TLHAF) is a prototypical
frustrated quantum magnet, which exhibits remarkable quantum many-body effects that arise …

We investigate the quantum spin-1/2 zigzag chain with frustrated J 1-J 2 Heisenberg
interactions, incorporating additional off-diagonal exchange interactions known as the Γ …

Quantum anisotropic exchange interactions in magnets can induce competitions between
phases in a different manner from those typically driven by geometrically frustrated …

We study various quantum quench processes induced by the Möbius/sine-square
deformation of the Hamiltonian in two-dimensional conformal field theories starting from the …

By making use of conformal map**, we construct various time-evolution operators in (1+
1)-dimensional conformal field theories (CFTs), which take the form∫ dxf (x) H (x), where H …

Fifty years after Anderson's resonating valence-bond proposal, the spin-1/2 triangular-lattice
Heisenberg antiferromagnet (TLHAF) remains the ultimate platform to explore highly …

Abstract The Heisenberg antiferromagnetic spin-1/2 chain, originally introduced almost a
century ago, is one of the best studied models in quantum mechanics due to its exact …

In this work, motivated by the sine-square deformation (SSD) for (1+ 1)-dimensional
quantum critical systems, we study the nonequilibrium quantum dynamics of a conformal …