scholarly journals Investigation of cold atom collision frequency shift measured by rapid adiabatic passage in cesium fountain clock

2020 ◽  
Vol 69 (14) ◽  
pp. 140601
Author(s):  
Yong Guan ◽  
Dan-Dan Liu ◽  
Xin-Liang Wang ◽  
Hui Zhang ◽  
Jun-Ru Shi ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Collision Frequency ◽  
Cold Atom ◽  
Adiabatic Passage ◽  
Atom Collision

scholarly journals Measurement of collision frequency shift in strontium optical lattice clock

2019 ◽  
Vol 68 (23) ◽  
pp. 233401
Author(s):  
Xiao-Tong Lu ◽  
Ting Li ◽  
De-Huan Kong ◽  
Ye-Bing Wang ◽  
Hong Chang
Keyword(s):  
Frequency Shift ◽  
Optical Lattice ◽  
Collision Frequency ◽  
Optical Lattice Clock

Acousto-optic modulators for a controlled frequency shift of light beams in optical and microwave cold-atom frequency standards

2019 ◽  
Vol 49 (9) ◽  
pp. 857-862
Author(s):  
V M Epikhin ◽  
V N Baryshev ◽  
S N Slyusarev ◽  
A V Aprelev ◽  
I Yu Blinov
Keyword(s):  
Frequency Shift ◽  
Cold Atom ◽  
Frequency Standards ◽  
Light Beams

QUANTUM INFORMATION IN OPTICAL LATTICES

2010 ◽  
Vol 24 (25n26) ◽  
pp. 5105-5114
Author(s):  
ANGELA M. GUZMÁN ◽  
MARCO A. DUEÑAS E.
Keyword(s):  
Electromagnetic Interaction ◽  
Logic Gate ◽  
Cold Atom ◽  
Dipole Interaction ◽  
Spatial Modulation ◽  
Resonant Condition ◽  
Gate Operation ◽  
Qubit System ◽  
Phase Gate ◽  
Atom Collision

Experimental realizations of a two-qubit quantum logic gate based on cold atom collisions have been elusive mainly due to the decoherence effects introduced during the quantum gate operation, which cause transitions out of the two-qubit space and lead to a decreased gate operation fidelity. This type of decoherence effects, due to the non closeness of the interacting two-qubit system, are characteristic of the electromagnetic interaction, since the electromagnetic vacuum acts as a reservoir whose eigenmodes might become active during the gate operation. To describe the cold-atom collision we consider the quantum non-Hermitian dipole-dipole interaction instead of the less realistic s-scattering approach widely used in the literature. By adding an ancillary qubit, we take advantage of the spatial modulation of the non-Hermitian part of the interaction potential to obtain a "resonant" condition that should be satisfied to achieve lossless operation of a specific two-qubit quantum phase-gate. We demonstrate that careful engineering of the collision is required to obtain a specific truth table and to suppress the effects inherent in the openness of the system arising from the electromagnetic interaction.

Frequency shift mitigation in a cold-atom CPT clock

2016 ◽  
Author(s):  
Xiaochi Liu ◽  
Eugene Ivanov ◽  
John Kitching ◽  
Elizabeth A. Donley
Keyword(s):  
Frequency Shift ◽  
Cold Atom
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