title: Phase stabilization of a frequency comb using multipulse quantum interferometry.
abstract: From the interaction between a frequency comb and an atomic qubit, we derive quantum protocols for the determination of the carrier-envelope offset phase, using the qubit coherence as a reference, and without the need of frequency doubling or an octave spanning comb. Compared with a trivial interference protocol, the multipulse protocol results in a polynomial enhancement of the sensitivity O(N-2) with the number N of laser pulses involved. We specialize the protocols using optical or hyperfine qubits, Λ schemes, and Raman transitions, and introduce methods where the reference is another phase-stable cw laser or frequency comb.
authors.affiliation: Instituto de Física Fundamental, IFF-CSIC, Serrano 113 b, Madrid 28006, Spain and Departamento de Análisis Matemático, Universidad Complutense de Madrid, 24040 Madrid, Spain.
authors.forename: Andrea
authors.initials: A
authors.lastname: Cadarso
authors.affiliation: Instituto de Física Fundamental, IFF-CSIC, Serrano 113 b, Madrid 28006, Spain and Instituto de Estructura de la Materia, IEM-CSIC, Serrano 123, Madrid 28006, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Mur-Petit
authors.affiliation: Instituto de Física Fundamental, IFF-CSIC, Serrano 113 b, Madrid 28006, Spain.
authors.forename: Juan José
authors.initials: JJ
authors.lastname: García-Ripoll