Exactly solvable Kitaev model in three dimensions

精确可解的非厄米相互作用 Kitaev 链的拓扑相图

Topological phase diagrams of exactly solvable non-Hermitian interacting Kitaev chains

本文研究非厄米相互作用 Kitaev 链的拓扑相，精确给出复 Hubbard 作用下二聚化 Kitaev-Hubbard 链的相边界，并结合数值方法揭示非厄米拓扑简并区域。

Exact solutions and topological phase diagram in interacting dimerized Kitaev topological superconductors

It was recently shown that an interacting Kitaev topological superconductor model is exactly solvable based on two-step Jordan-Wigner transformations together with one spin rotation. We generalize this model by including the dimerization, which is shown also to be exactly solvable. We analytically determine the topological phase diagram containing seven distinct phases. It is argued that the system is topological when a fermionic many-body Majorana zero-energy edge state emerges. It is intriguing that there are two tetra-critical points, at each of which four distinct phases touch.

Exactly solving the Kitaev chain and generating Majorana-zero-modes out of noisy qubits

Majorana-zero-modes (MZMs) were predicted to exist as edge states of a physical system called the Kitaev chain. MZMs should host particles that are their own antiparticles and could be used as a basis for a qubit which is robust-to-noise. However, all attempts to prove their existence gave inconclusive results. Here, the Kitaev chain is exactly solved with a quantum computing methodology and properties of MZMs are probed by generating eigenstates of the Kitev Hamiltonian on 3 noisy qubits of a publicly available quantum computer. After an ontological elaboration I show that two eigenstates of …

Condensate Fragmentation in a New Exactly Solvable Model for Confined Bosons

Based on Richardson's exact solution of the pairing model and the Gaudin model for spin systems we derive a new class of exactly solvable models for finite boson system. As an example we solve a particular hamiltonian which displays a transition to a fragmented condensate for repulsive pairing interactions.