Excitation of coherent correlated states in the Jaynes-Cummings model by external deterministic forces: II

Verlan, E. M.; Razumova, M. A.

doi:10.1134/1.1420855

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2021

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“…The effects of this coupling are formally eliminated in the Foldy-Wouthuysen (FW) representation [11], as we now show. For the one-dimensional Dirac oscillator, the FW and the original Dirac representation are related by the unitary transformation [12],…”

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confidence: 99%

Quantum Non-demolition Measurements in the Relativistic Dirac Oscillator

Sun,

Zhang,

Meystre

et al. 2021

Preprint

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We investigate the feasibility of performing quantum non-demolition (QND) measurements in relativistic quantum systems, using the one-dimensional Dirac oscillator as a specific example. We derive general expressions for its QND observables and find that they are intricate combinations of the position, momentum, and spin operators, which makes them challenging to realize experimentally in general. However, the situation is considerably simplified in both the weakly and strongly relativistic limits, where their experimental realization will be possible.

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confidence: 99%