Universal ultra-robust interrogation protocol with zero probe-field-induced frequency shift for quantum clocks and high-accuracy spectroscopy

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 fully eliminate the shift, especially when decoherence and relaxation by spontaneous emission or collisions are present. We propose to solve the fundamental problem of frequency shifts induced by laser probe by deriving the exact canonical form of a multi-pulse generalized Hyper-Ramsey (GHR) resonance, including decoherence and relaxation. We present a universal interrogation protocol based on composite laser-pulses spectroscopy with phase-modulation eliminating probe-induced frequency shifts at all orders in presence of various dissipative processes. Unlike frequency shifts extrapolation-based methods, a universal interrogation protocol based on $\pm \pi /4$ and $\pm 3\pi /4$ phase-modulated resonances is proposed which does not compromise the stability of the optical clock while maintaining an ultra-robust error signal gradient in presence of substantial uncompensated ac Stark-shifts. Such a scheme can be implemented in two flavours: either by inverting clock state initialization or by pulse order reversal even without a perfect quantum state initialization. This universal interrogation protocol can be applied to atomic, molecular and nuclear frequency metrology, mass spectrometry and to the field of precision spectroscopy. It might be designed using magic-wave induced transitions, two-photon excitation and magnetically-induced spectroscopy or it might even be implemented with quantum logic gate circuit and qubit entanglement.

In memory of N.F Ramsey and A. Clairon. Accepted for publication in Phys. Rev. A

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Cited by in corpus (9)

• Generalized auto-balanced Ramsey spectroscopy of clock transitions
• Progress and perspectives on composite laser-pulses spectroscopy for high-accuracy optical clocks
• Universal methods for suppressing the light shift in atomic clocks using power modulation
• Combined error signal in Ramsey spectroscopy of clock transitions
• Magic polarization for light shift cancellation in two-photon optical clocks
• Hyper-Ramsey spectroscopy with probe laser intensity fluctuations
• Generalized hyper-Ramsey resonance with spinors
• SU(2) hyper-clocks: quantum engineering of spinor interferences for time and frequency metrology
• Hyper Ramsey-Bordé matter-wave interferometry for robust quantum sensors