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Next generation of high-accuracy optical clocks based on composite laser-pulses spectroscopy

par Caroline CHAMPENOIS - publié le

séminaire du laboratoire
jeudi 27 avril 14:00 service 322 campus Saint-Jérôme

Thomas Zanon-Willette

LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75005,

abstract :

Optical clock interrogation protocols, based on laser-pulse spectroscopy, are suffering from probe-induced frequency-shifts and their variations induced by laser power. Original Hyper-Ramsey probing scheme, which was proposed to alleviate those issues, does not apply below fractional frequency changes of 10−18 when decoherence and relaxation by spontaneous emission or collisions are present. We present a universal interrogation protocol based on composite laser-pulses spectroscopy with phase-modulation for both fermionic and bosonic optical clocks, eliminating probe-induced frequency-shifts at all orders even in presence of various dissipative processes. This scheme, using a magic combination of ±π/4 and ±3π/4 phase-modulated generalized Hyper-Ramsey resonances, extremely robust to errors in laser parameters, can be applied to atomic, molecular and nuclear frequency metrology, mass spectrometry and precision spectroscopy.
[1] T. Zanon-Willette, S. Almonacil, E. de Clercq, A.D. Ludlow and E. Arimondo, Quantum engineering of atomic phase shifts in optical clocks, Phys. Rev. A 90, 053427 (2014).
[2] T. Zanon-Willette, A.V. Taichenachev and V.I. Yudin, Generalized hyper-Ramsey resonance with separated oscillating fields, Phys. Rev. A 92, 023416 (2015).
[3] V.I. Yudin, A.V. Taichenachev, M.Yu. Basaleev and T. Zanon-Willette, Synthetic Frequency Protocol in the Ramsey Spectroscopy of Clock Transitions, Phys. Rev. A 94, 052505 (2016).
[4] T. Zanon-Willette, E. de Clercq and E. Arimondo, Probe light-shift elimination in generalized hyper-Ramsey quantum clocks, Phys. Rev. A 93, 042506 (2016).
[5] T. Zanon-Willette, M. Minissale, V.I. Yudin and A.V. Taichenachev, Composite pulses in Hyper-Ramsey spectroscopy for the next generation of atomic clocks, J. Phys. : Conf. Ser. 723 012057 (2016).
[6] T. Zanon-Willette, R. Lefevre, A.V. Taichenachev and V.I. Yudin, Universal interrogation protocol for zero probe-field-induced frequency-shift in high- accuracy quantum clocks, ArXiv arXiv:1702.06433 (2017).

contact : Marco Minissale et Caroline Champenois


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