TY - JOUR
T1 - Enhanced entanglement in multi-bath spin-boson models
AU - Hogg, Charlie R.
AU - Cerisola, Federico
AU - Cresser, James D.
AU - Horsley, Simon A. R.
AU - Anders, Janet
N1 - Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2024
Y1 - 2024
N2 - The spin-boson model usually considers a spin coupled to a single bosonic bath. However, some physical situations require coupling of the spin to multiple environments. For example, spins interacting with phonons in three-dimensional magnetic materials. Here, we consider a spin coupled isotropically to three independent baths. We show that coupling to multiple baths can significantly increase entanglement between the spin and its environment at zero temperature. The effect of this is to reduce the spin's expectation values in the mean force equilibrium state. In contrast, the classical threebath spin equilibrium state turns out to be entirely independent of the environmental coupling. These results reveal purely quantum effects that can arise from multibath couplings, with potential applications in a wide range of settings, such as magnetic materials.
AB - The spin-boson model usually considers a spin coupled to a single bosonic bath. However, some physical situations require coupling of the spin to multiple environments. For example, spins interacting with phonons in three-dimensional magnetic materials. Here, we consider a spin coupled isotropically to three independent baths. We show that coupling to multiple baths can significantly increase entanglement between the spin and its environment at zero temperature. The effect of this is to reduce the spin's expectation values in the mean force equilibrium state. In contrast, the classical threebath spin equilibrium state turns out to be entirely independent of the environmental coupling. These results reveal purely quantum effects that can arise from multibath couplings, with potential applications in a wide range of settings, such as magnetic materials.
UR - http://www.scopus.com/inward/record.url?scp=85194304981&partnerID=8YFLogxK
U2 - 10.22331/q-2024-05-23-1357
DO - 10.22331/q-2024-05-23-1357
M3 - Article
AN - SCOPUS:85194304981
SN - 2521-327X
VL - 8
SP - 1
EP - 15
JO - Quantum
JF - Quantum
M1 - 1357
ER -