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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

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Motional Dynamical Decoupling for Interferometry with Macroscopic Particles.

Julen S Pedernales¹, Gavin W Morley², Martin B Plenio¹

¹Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89081 Ulm, Germany.

Physical Review Letters

|July 24, 2020

Summary

This summary is machine-generated.

We developed dynamical decoupling for macroscopic objects, making matter-wave superpositions resilient to noise. This technique enhances interferometry, particularly for levitated nanodiamonds, by overcoming magnetic field limitations.

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Area of Science:

Quantum mechanics
Macroscopic quantum phenomena
Interferometry

Background:

Dynamical decoupling is a technique to protect quantum systems from noise.
Macroscopic objects offer new platforms for quantum experiments.
Interferometry with matter waves is sensitive to environmental perturbations.

Purpose of the Study:

To extend dynamical decoupling to mechanical degrees of freedom of macroscopic objects.
To enhance the resilience of matter-wave superpositions in interferometry.
To overcome limitations imposed by environmental noise and magnetic fields.

Main Methods:

Applying the concept of dynamical decoupling to the mechanical motion of macroscopic objects.
Using levitated nanodiamonds with color centers in a magnetic field gradient as a model system.
Implementing periodic forcing of the mechanical degree of freedom.

Main Results:

Achieved a linear-in-time growth of the separation distance, independent of the magnetic field gradient.
Demonstrated protection of superposition coherence from environmental perturbations.
Overcame limitations imposed by diamagnetic forces in nanodiamond interferometry.

Conclusions:

Dynamical decoupling is a viable strategy for macroscopic quantum interferometry.
Periodic mechanical forcing can significantly improve the performance of such interferometers.
This approach opens new avenues for precision measurements using macroscopic quantum states.