Quantum-droplet interferometry

Abstract

We propose atom interferometers based on quantum droplet (QD), which is also being reported as a superior platform for interferometry. The emphasis has been given to harmonic-oscillator (HO) or ring-shaped potentials. In the HO trap, a Gaussian barrier induces coherent splitting; in the ring, one or two barriers guide the splitting and subsequent recombination. The atom number and relative mean-field interaction strength critically affect the interferometric performance. The transmission-coefficient analysis identifies values of the barrier parameters for the balanced $50:50$ splitting. The post-recombination atom-number imbalance serves as a sensitive indicator of the relative phase between merging daughter QDs. We demonstrate that the HO-based setup may serve as a tilt-meter and target detector, and the ring geometry may be used as a compact QD Sagnac interferometer for rotation sensing.

24 pages, 15 figures. To be published in New Journal of Physics

References in corpus (12)

• Quantum liquid droplets in a mixture of Bose-Einstein condensates
• Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
• Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques
• Long-lived and transient supersolid behaviors in dipolar quantum gases
• Sagnac Interferometry Using Bright Matter-Wave Solitons
• Modulational instability, inter-component asymmetry and formation of quantum droplets in one-dimensional binary Bose gases
• Bright matter-wave soliton collisions at narrow barriers
• Bright solitons in ultracold atoms
• Low-Dimensional Self-Bound Quantum Rabi-Coupled Bosonic Droplets
• A Mean-Field Analogue of the Hong-Ou-Mandel Experiment With Bright Solitons
• Matter-wave Fractional Revivals in a Ring Waveguide
• Quasi-one-dimensional harmonically trapped quantum droplets