Development of an atomic clock on an atom chip (Optimisation of the coherence time and preliminary characterisation)

Robert Lutwak

We report on recent advances in the core performance and capabilities of the chip-scale atomic clock.

汪中

Clément Lacroûte, Friedemann Reinhard, F. Ramírez-Martínez +4 more

We present an atomic clock based on the interrogation of magnetically trapped (87)Rb atoms. Two photons, in the microwave and radiofrequency domain, excite the clock transition. At a magnetic field of 3.23 G the clock transition from |F = 1, m(F) = -1> to |F = 2, m(F) = 1> is 1st-order insensitive to magnetic field variations. Ramsey interrogation times longer than 2 s can be achieved, leading to a projected clock stability in the low 10(-13) at 1 s for a cloud of 10(5) atoms. We use an atom chip to cool and trap the atoms. A coplanar waveguide is integrated to the chip to carry the Ramsey interrogation signal, making the physics package as small as (5 cm)(3). We describe the experimental setup and show preliminary Ramsey fringes of line width 1.25 Hz.

Vladislav P. Gerginov, Svenja A. Knappe, Vishal Shah +3 more

Clément Lacroûte, F. Ramírez-Martínez, P. Rosenbusch +4 more

We present an atomic clock based on the interrogation of magnetically trapped87Rb atoms. Two photons, in the microwave and radiofrequency domain excite the clock transition. At a magnetic field of 3.23 G the clock transition from |F=1, mF=-1rang to |F=2, mF=1rang is 1storder insensitive to magnetic field variations. Long Ramsey interrogation times can thus be achieved, leading to a projected clock stability in the low 10-13at 1 s. We use an atom chip to cool and trap the atoms. A coplanar waveguide has been integrated to the chip to carry the Ramsey interrogation signal, making the physics package as small as (5 cm)3. We describe the experimental setup and show preliminary Ramsey fringes of line width 1.25 Hz.

Li, Shao-liang, Xu +9 more