Constructing Nano-Object Quantum Superpositions with a Stern-Gerlach Interferometer

Abstract

Probing quantum mechanics, quantum aspects of general relativity along with the sensing and the constraining of classical gravity can all be enabled by unprecedented spatial sizes of superpositions of massive objects. In this paper, we show that there is a feasible setup sourced by realizable magnetic field gradients $\mathcal{O}(10-100)$ Tm${}^{-1}$ to construct a large spatial superposition of $\mathcal{O}(10^{-4}-10^{-8})$ m for masses $\mathcal{O}(10^{-16}-10^{-14})$ kg over a time period of up to $0.1-10$ seconds.

8 pages, 6 figures

References in corpus (13)

• A Spin Entanglement Witness for Quantum Gravity
• Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
• Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
• Large Quantum Superpositions and Interference of Massive Nanometer-Sized Objects
• Testing the limits of quantum mechanical superpositions
• Quantum control of a nanoparticle optically levitated in cryogenic free space
• Review of short-range gravity experiments in the LHC era
• Full Rotational Control of Levitated Silicon Nanorods
• A long-lived Zeeman trapped-ion qubit
• Quantum rotations of nanoparticles
• Improving resilience of the Quantum Gravity Induced Entanglement of Masses (QGEM) to decoherence using 3 superpositions
• Theory of nanoparticle cooling by elliptic coherent scattering
• Quantum control of nuclear spin qubits in a rapidly rotating diamond

Cited by in corpus (36)

• Mechanism for the quantum natured gravitons to entangle masses
• Fast Quantum Interference of a Nanoparticle via Optical Potential Control
• Gravitational Optomechanics: Photon-Matter Entanglement via Graviton Exchange
• Catapulting towards massive and large spatial quantum superposition
• Entanglement Witness for the Weak Equivalence Principle
• Entanglement based tomography to probe new macroscopic forces
• Probing massless and massive gravitons via entanglement in a warped extra dimension
• Quantum entanglement of masses with non-local gravitational interaction
• Mass-independent scheme for enhancing spatial quantum superpositions
• Decoherence of a matter-wave interferometer due to dipole-dipole interactions
• Relaxation of experimental parameters in a Quantum-Gravity Induced Entanglement of Masses Protocol using electromagnetic screening
• Quantum Gravitational Sensor for Space Debris
• Distinguishing Jordan and Einstein frames in gravity through entanglement
• Limit on spatial quantum superpositions with massive objects due to phonons
• Micron-size spatial superpositions for the QGEM-protocol via screening and trapping
• Internal decoherence in nano-object interferometry due to phonons
• Gravitational Harmonium: Gravitationally Induced Entanglement in a Harmonic Trap
• Dephasing due to electromagnetic interactions in spatial qubits
• Testing Whether Gravity Acts as a Quantum Entity When Measured
• Requirements on Quantum Superpositions of Macro-Objects for Sensing Neutrinos
• Controlling the motional quality factor of a diamagnetically levitated graphite plate
• Gravitational decoherence by the apparatus in the quantum-gravity induced entanglement of masses
• Decoherence rate expression due to air molecule scattering in spatial qubits
• Axion-Like Dark Matter Detection Using Stern-Gerlach Interferometer
• Phonon-induced contrast in a matter-wave interferometer
• Inertial Torsion Noise in Matter-Wave Interferometers for Gravity Experiments
• Optically Hyperpolarized Materials for Levitated Optomechanics
• Continuous-Variable Entanglement through Central Forces: Application to Gravity between Quantum Masses
• Magnetic noise in macroscopic quantum spatial superposition
• Correlations and signaling in the Schrödinger-Newton model
• A simple gravitational self-decoherence model
• Probing the Schroedinger-Newton equation in a Stern-Gerlach interferometer
• Quantitative non-classicality of mediated interactions
• Quantum internal vibrations in macroscopic systems with classical centers of mass
• Optimal Superpositions for Particle Detection via Quantum Phase
• Massive quantum superpositions using magneto-mechanics