Effects of external magnetic field on thermal entanglement in a spin-one chain with three particles

Jami, Safa; Amerian, Z.; Ahmadi, Fatemeh; Motevalizadeh, L.

doi:10.1007/s12648-012-0224-x

Indian J Phys

2012

DOI: 10.1007/s12648-012-0224-x

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Effects of external magnetic field on thermal entanglement in a spin-one chain with three particles

Safa Jami

Z. Amerian

Fatemeh Ahmadi

et al.

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2014

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“…In the case of such systems, it is not accurate to apply piecewise-constant controls. In an experimental setup that utilizes an external magnetic field [6,7], such restrictions come into play and cannot be neglected.…”

mentioning

confidence: 99%

Quantum control robust with respect to coupling with an external environment

Pawela

Puchała

2014

Quantum Inf Process

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We study coherent quantum control strategy that is robust with respect to coupling with an external environment. We model this interaction by appending an additional subsystem to the initial system and we choose the strength of the coupling to be proportional to the magnitude of the control pulses. Therefore, to minimize the interaction, we impose L 1 norm restrictions on the control pulses. In order to efficiently solve this optimization problem, we employ the BFGS algorithm. We use three different functions as the derivative of the L1 norm of control pulses: the signum function, a fractional derivative d α |x| dx α , where 0 < α < 1, and the Fermi-Dirac distribution. We show that our method allows to efficiently obtain the control pulses which neglect the coupling with an external environment.

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mentioning

confidence: 99%

Quantum control robust with respect to coupling with an external environment

Pawela

Puchała

2014

Quantum Inf Process

View full text Add to dashboard Cite

show abstract

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Effects of external magnetic field on thermal entanglement in a spin-one chain with three particles

Cited by 1 publication

References 9 publications

Quantum control robust with respect to coupling with an external environment

Quantum control robust with respect to coupling with an external environment

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