Disclosed is a method for measuring an external parameter by atomic interferometry using two sets of atoms that belong to different species. Two measurements are taken simultaneously at the same location, but independently from one another, in order to obtain two measurement results. Constant phase shifts that appear in the atomic interferences for the two atom sets are quadrature-adjusted in order to ensure that one of the two measurements provides a value for the external parameter with satisfactory accuracy.

Systems and methods for eliminating multi-path errors from atomic inertial sensors are provided. In certain embodiments, a system for performing atom interferometry includes a vacuum cell containing multiple atoms and a first plurality of lasers configured to trap the atoms within the vacuum cell. The system further includes a second plurality of lasers configured to impart momentum to the atoms and direct the atoms down multiple paths, wherein a primary path in the multiple paths has a first and second component that converge at a converging point, wherein a diverging part of the primary path in which the first and second components are diverging is asymmetrical with respect to a converging part of the primary path in which the first and second components are converging, such that only the first and second components converge at the converging point wherein other paths do not converge at the converging point.

A nanotweezer and method of trapping and dynamic manipulation thereby are provided. The nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures arranged in an array, and a trapping region laterally displaced from the array; a second metastructure including a second substrate and a second electrode; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode; and a light source configured to selectively apply an excitation light to the microfluidic channel at a first location corresponding to the array, thereby to trap a nanoparticle at a second location corresponding to the trapping region.

The disclosed subject matter relates to a cloud-accessible quantum simulator based on programmable atom arrays. An example cloud-accessible quantum simulator can include an atomic platform, a laser and photonics system, a timing and control box, a user interface, and quantum algorithms. The disclosed system provides a platform for developing and implementing quantum algorithms in multiple fields.

The disclosed subject matter relates to a photonically integrated atomic tweezer clock. An example atomic tweezer clock can include a laser system, a holographic metasurface, a vacuum system, and a cold atoms source, wherein the holographic metasurface generates an optical tweezer array, and the atoms are trapped by the optical tweezer array in the vacuum system for generating an atomic tweezer clock. In certain embodiments, the laser system is integrated with frequency combs in chip-scale to ensure compactness and robustness.

A quantum computing system, method and computer readable medium involve a vacuum enclosure for sustaining a vacuum below 10.sup.3 millibar, optical resonators tuned to a resonance of an alkali atom, and a trapping laser for maintaining the alkali atom within a mode of the optical resonators. An atom excitation laser induces photon emissions, a plurality of waveguides couple photons to and from the optical resonators, and a plurality of detectors detect a presence or absence of an atom-resonator coupling. A processor receives output signals from the detectors and controls optical switches for switching between two or more of the plurality of waveguides.

Disclosed is an optical trap calibration apparatus and method based on variation of electric field by optical imaging of a nanoparticle. By means of a direct optical imaging method, a linear nanoparticle equilibrium position displacement under the action of a constant electric field is measured to realize calibration, thereby avoiding the introduction of error signals, and improving the reliability of differential calibration. The specific calibration method and apparatus of the present invention are not only suitable for calibration of electric field quantity, but also suitable for the calibration of other magnetic forces and the like. By means of the accurate calibration of mechanical quantity in the present invention, the development and application of the vacuum optical trap sensing technology can be promoted.

A system for atom interferometry includes one laser configured to generate an output beam; an acousto-optic deflector disposed to generate two diffracted beams that are spatially offset with identical polarizations; and a birefringent crystal disposed to receive the two diffracted beams, where one of the two diffracted beams is passed through a half wave plate so that the two diffracted beams have orthogonal polarizations, where the birefringent crystal further disposed and selected in size to enable the two diffracted beams to re-overlap upon exiting the birefringent crystal by having one of the two diffracted beams walk toward the other of the two diffracted beams in the birefringent crystal, where the two diffracted beams have minimal path length differences so that the two diffracted beams are useable for interferometry.

In an example, the present invention provides a quantum computer cell system. The system has a fiber optical cable. In an example, the system has a nanofiber region configured from a center portion of the fiber optic cable and coupled between a first fiber Bragg Grating and a second fiber Bragg Grating. In an example, the system has a first taper region configured from a first portion of the nanofiber region within a vicinity of the first fiber Bragg Grating and a second taper region configured from a second portion of the nanofiber region within a vicinity of the second fiber Bragg Grating. The system has a plurality of atoms evanescently coupled to the nanofiber region. The system has an imaging system configured to generate an optical tweezer array and to detect one or more photons from one or the plurality of atoms.

An atomic interferometer system comprises optical tweezers each configured to trap at least one atom therein, an atom source system configured to release atoms, and a controller configured to control the optical tweezers to trap at least one atom released by the atom source system in one of the tweezers, to spatially split a wave function of the trapped atom between at least two of the tweezers, and to at least partially recombine the split atomic wave function in at least one of the tweezers. The atomic interferometer system can also comprise a measuring system configured to measure wavefunction population in each of the tweezers and to display an output pertaining to the wavefunction populations.