Abstract: A method for changing an inter-particle distance (D) between particles (1) arranged in a particle array (2) is provided, the method comprises creating a primary optical lattice (10), loading the particles (1) into the primary optical lattice (10) such that the particles (1) are trapped in the primary optical lattice (10), changing a primary-lattice spacing (L1) of the primary optical lattice (10) to change the inter-particle distance (D), creating an auxiliary optical lattice (20), ramping up the auxiliary-lattice and ramping down the primary optical lattice until the particles (1) are trapped in the auxiliary optical lattice (20), setting the primary-lattice spacing (L1) to a different primary-lattice spacing value, ramping up the primary-lattice and ramping down the auxiliary lattice (20) until the particles are trapped in the primary optical lattice (10) again.

Abstract: A device for generating and manpulating coherent matter waves contains a magnetic trap being adapted to form a magnetic trapping potential for gas atoms, said magnetic trap comprising a plurality of trap coils being connected with a current supply device and including two quadrupole coils and one Ioffe coil, wherein the trap coils are arranged in such a relative position that a common trap is formed, said common trap having a quadrupole trap shape with one trap minimum if the quadrupole coils are in an operation condition and the Ioffe coil is in a currentless condition or two trap minima or a Ioffe trap shape if all the quadrupole and Ioffe coils are in an operation condition and a shielding device protecting the magnetic trap against external magnetic fields. A method of continuous extracting matter waves from the trap is described.