INVESTIGADORES
CORMICK Maria Cecilia
congresos y reuniones científicas
Título:
Preparation of the ground state of a spin chain by dissipation in a structured environment
Autor/es:
CECILIA CORMICK; ALEJANDRO BERMUDEZ; SUSANA F. HUELGA; MARTIN B. PLENIO
Lugar:
Erice
Reunión:
Workshop; Noise, Information and Complexity at Quantum Scale; 2013
Resumen:
We propose a dissipative method to prepare the ground state of theisotropic X Y spin Hamiltonian in a transverse field. Our model consists of a spin chain with nearest-neighbor interactions and an additional collective coupling of the spins to a damped harmonic oscillator. The latter provides an effective environment with a Lorentzian spectral density and can be used to drive the chain asymptotically toward its multipartite-entangled ground state at a rate that depends on the degree of non-Markovianity of the evolution. We also present a detailed proposal for the experimental implementation with a chain of trapped ions. The protocol does not require individual addressing, concatenated pulses, or multi-particle jump operators, and is capable of generating the desired targetstate in small ion chains with very high fidelities.