Universal destabilization and slowing of spin transfer functions by a bath of spins

Abstract

We investigate the effect of a spin bath on the spin transfer functions of a permanently coupled spin system. When each spin is coupled to a seperate environment, the effect on the transfer functions in the first excitation sector is amazingly simple: the group velocity is slowed down by a factor of two, and the fidelity is destabilized by a modulation of |cos Gt|, where G is the mean square coupling to the environment.

4 pages, 5 figures; added references

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• Non-Markovian dynamics of a qubit coupled to an Ising spin bath
• Decoherence effects on the quantum spin channels
• Information Transferring Ability of the Different Phases of a finite XXZ Spin Chain
• Protected quantum-state transfer in decoherence-free subspaces
• Transfer of d-Level quantum states through spin chains by random swapping
• Spin State Transfer in Laterally Coupled Quantum Dot Chains with Disorders
• Quantum-state transfer in spin chains via isolated resonance of terminal spins
• Decoherence-assisted transport in quantum networks
• Disorder overtakes Order in Information Concentration over Quantum Networks
• Excitation- and state-transfer through spin chains in the presence of spatially correlated noise
• Spin Star as Switch for Quantum Networks
• Decoherence as attenuation of mesoscopic echoes in a spin-chain channel
• Quantum communication via a continuously monitored dual spin chain
• Thermal Fluctuations Enhance Order-from-Disorder of Quantum Correlations in Quenched Disordered Spin Models
• Graph state generation with noisy mirror-inverting spin chains
• Information transfer rates in spin quantum channels
• Entanglement Transfer via XXZ Heisenberg chain with DM Interaction
• Quasi-perfect state transfer in a bosonic dissipative network
• Decoherence of two-electron spin states in quantum dots
• Perfect Coding for Dephased Quantum State Transfer
• Long-distance Entanglement generation by Local Rotational Protocols in spin chains
• Response to defects in multi- and bipartite entanglement of isotropic quantum spin networks
• Quantum-state transfer on spin-chain channels with random imperfection
• Noise reducing encoding strategies for spin chains
• Measurement enhances long-distance Entanglement generation in spin chains with dissipative processes
• Conclusive quantum-state transfer with a single randomly coupled spin chain
• Quantum refrigerator embedded in spin-star environments: Scalings of temperature and refrigeration time