Entanglement of condensed magnons via momentum-space fragmentation
arXiv:1703.06232 · doi:10.1103/PhysRevB.96.054412
Abstract
A scheme is presented for engineering momentum-space entanglement of fragmented magnon condensates. We consider easy plane frustrated antiferromagnets in which the magnon dispersion has degenerate minima that represent umbrella chiral spin textures. With an applied magnetic field, we tune the Hamiltonian near a quantum critical point that is is signaled by a singularity in the entanglement entropy. The ground state develops momentum-space entanglement of the chiral spin textures. The size of the entangled superposition is accessible experimentally through the magnetic structure factor. Our model is motivated by equilibrium magnon condensates in frustrated antiferromagnets such as CsCuCl3, and it can also be simulated in spin-orbit coupled Mott insulators in atomic optical lattices and circuit quantum electrodynamics.
References in corpus (21)
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
- Squeezing and entanglement in a Bose-Einstein condensate
- Bose-Einstein Condensation in Magnetic Insulators
- Optimal Quantum Phase Estimation
- Generating Single Microwave Photons in a Circuit
- Spin-orbit coupled Bose-Einstein condensates
- Magnetic field sensing beyond the standard quantum limit using 10-spin NOON states
- Spontaneous Magnon Decays
- Bose-Einstein Condensation of Magnons in Cs2CuCl4
- On the phase transition of light in cavity QED lattices
- A measurement-based measure of the size of macroscopic quantum superpositions
- Stability of Bose Einstein condensates of hot magnons in YIG
- Quantum error correction against photon loss using NOON states
- Measuring the size of a Schroedinger cat state
- Bose-Einstein Condensation of Triplons in Ba3Cr2O8
- Generation of macroscopic superposition states in ring superlattices
- Robust Mesoscopic Superposition of Strongly Correlated Ultracold Atoms
- Universality of Schmidt decomposition and particle identity
- Proposal for the Creation and Optical Detection of Spin Cat States in Bose-Einstein Condensates
- Topological transport in a spin-orbit coupled bosonic Mott insulator