Atom chip having a conductive surface for an ultra-cold atom inertial sensor, and associated sensor

An atom chip (Ach) for an ultra-cold atom sensor, comprising a measurement plane XY defined by an axis X and an axis Y that are orthogonal, said measurement plane being normal to an axis Z, the atom chip comprising:

• a plurality of first pairs of waveguides, a first pair consisting of a first (CPWX1, CPWX1′) and a second (CPWX2, CPWX2′) waveguide that are coplanar, parallel to one another and arranged symmetrically on either side of an axis whose projection in the plane XY is along the axis X, called pairs of guides along X,
• a plurality of second pairs of waveguides, a second pair consisting of a first (CPWY′1, CPWY′1′) and a second (CPWY′2, CPWY′2′) waveguide that are coplanar, parallel to one another and arranged symmetrically on either side of an axis whose projection in the plane XY is along an axis Y′ different from the axis X, called pairs of guides along Y′,
• the pairs of guides along X being electrically insulated from the pairs of guides along Y′;
• the projections in the plane XY of the first pair furthest from X and of the second pair furthest from Y′ forming, at their intersection, a parallelogram (P) with a centre O,
• a first conductive wire (W1) having a projection in the plane XY along X or Y′ or a diagonal (D1, D2) of said parallelogram, the first conductive wire being designed to be flowed through by a DC current,
• said first wire having a flaring so as to take the form of a surface (S) whose projection in the plane XY incorporates said parallelogram (P) and exhibits symmetry about the point O.