Entangling macroscopic diamonds at room temperature: Bounds on the continuous-spontaneous-localization parameters

Abstract

A recent experiment [K. C. Lee et al., Science 334, 1253 (2011)] succeeded in detecting entanglement between two macroscopic specks of diamonds, separated by a macroscopic distance, at room temperature. This impressive results is a further confirmation of the validity of quantum theory in (at least parts of) the mesoscopic and macroscopic domain, and poses a challenge to collapse models, which predict a violation of the quantum superposition principle, which is the bigger the larger the system. We analyze the experiment in the light of such models. We will show that the bounds placed by experimental data are weaker than those coming from matter-wave interferometry and non-interferometric tests of collapse models.

7 pages, 3 figures, v2: close to the published version, LaTeX

References in corpus (4)

• Large Quantum Superpositions and Interference of Massive Nanometer-Sized Objects
• Upper bounds on spontaneous wave-function collapse models using millikelvin-cooled nanocantilevers
• Optomechanical sensing of spontaneous wave-function collapse
• X-rays help to unfuzzy the concept of measurement

Cited by in corpus (24)

• Experimental bounds on collapse models from gravitational wave detectors
• Enhanced entanglement of two different mechanical resonators via coherent feedback
• Room temperature test of the Continuous Spontaneous Localization model using a levitated micro-oscillator
• Quantum information and CP measurement in $H\to {\tau }^{+}{\tau }^{-}$ at future lepton colliders
• Non-interferometric test of the Continuous Spontaneous Localization model based on rotational optomechanics
• Impact of dynamical collapse models on inflationary cosmology
• Novel CSL bounds from the noise-induced radiation emission from atoms
• Testing Continuous Spontaneous Localization with Fermi liquids
• Colored collapse models from the non-interferometric perspective
• Multilayer test masses to enhance the collapse noise
• Unitary unravelling for the Dissipative Continuous Spontaneous Localization model: application to optomechanical experiments
• Probing Spontaneous Wave-Function Collapse with Entangled Levitating Nanospheres
• Enhanced entanglement of two optical modes in optomechanical systems via an optical parametric amplifier
• Collapse models: main properties and the state of art of the experimental tests
• Collapse dynamics are diffusive
• Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications
• Einstein-Podolsky-Rosen steering and Bell nonlocality of two macroscopic mechanical oscillators in optomechanical systems
• Hydrogenic entanglement
• Quantum discord as a tool for comparing collapse models and decoherence
• Can the displacemon device test objective collapse models?
• General Galilei Covariant Gaussian Maps
• CSL reduction rate for rigid bodies
• Light-Pulse Atom Interferometric Test of Continuous Spontaneous Localization
• Collapse models and gravitational decoherence at test: How far can we push the limits of quantum mechanics?