Direct observation of deterministic macroscopic entanglement

  title={Direct observation of deterministic macroscopic entanglement},
  author={Shlomi Kotler and Gabriel A. Peterson and Ezad Shojaee and Florent Lecocq and Katarina Cicak and Alex Kwiatkowski and Shawn Geller and Scott Glancy and Emanuel Knill and Raymond W. Simmonds and Jos{\'e} Aumentado and John D. Teufel},
  pages={622 - 625}
Quantum entanglement goes large Quantum entanglement occurs when two separate entities become strongly linked in a way that cannot be explained by classical physics; it is a powerful resource in quantum communication protocols and advanced technologies that aim to exploit the enhanced capabilities of quantum systems. To date, entanglement has generally been limited to microscopic quantum units such as pairs or multiples of single ions, atoms, photons, and so on. Kotler et al. and Mercier de L… 
Quantum mechanics–free subsystem with mechanical oscillators
It is shown how it is possible to measure an oscillator without quantum back-action of the measurement by constructing one effective oscillator from two physical oscillators by realizes such a quantum mechanics–free subsystem using two micromechanical oscillators, and shows the measurements of two collective quadratures while evading the quantumBack-action on both of them.
Quantum entanglement: Bell's inequality trivially violated also classically
Quantum entanglement manifests in the perfect correlation between particles or photons separated by space and time beyond causal interference. However, classical covariance between vectorial
Mesoscopic and macroscopic quantum correlations in photonic, atomic and optomechanical systems
This paper reviews the progress that has been made in our knowledge of quantum correlations at the mesoscopic and macroscopic level. We begin by summarizing the Einstein-Podolsky-Rosen (EPR) argument
Quantum state preparation and tomography of entangled mechanical resonators.
Precisely engineered mechanical oscillators keep time, filter signals and sense motion, making them an indispensable part of the technological landscape of today. These unique capabilities motivate
Quantum Network with Magnonic and Mechanical Nodes
A quantum network consisting of magnonic and mechanical nodes connected by light is proposed. Recent years have witnessed a significant development in cavity magnonics based on collective spin
Two-mode Schrödinger-cat states with nonlinear optomechanics: generation and verification of non-Gaussian mechanical entanglement
Cavity quantum optomechanics has emerged as a new platform for quantum science and technology with applications ranging from quantum-information processing to tests of the foundations of physics. Of
Noise-Tolerant Optomechanical Entanglement via Synthetic Magnetism
Entanglement of light and multiple vibrations is a key resource for multi-channel quantum information processing and memory. However, entanglement generation is generally suppressed, or even fully
Entanglement Thresholds of Doubly Parametric Quantum Transducers
Doubly-parametric quantum transducers, such as electro-opto-mechanical devices, are quickly approaching quantum operation as decoherence mechanisms such as thermal noise, loss, and limited


Entanglement between distant macroscopic mechanical and spin systems
Entanglement is an essential property of multipartite quantum systems, characterized by the inseparability of quantum states of objects regardless of their spatial separation. Generation of
Entangled massive mechanical oscillators
An entangled quantum state of two or more particles or objects exhibits some of the most peculiar features of quantum mechanics. Entangled systems cannot be described independently of each other even
Remote quantum entanglement between two micromechanical oscillators
Remote quantum entanglement is demonstrated in a micromachined solid-state system comprising two optomechanical oscillators across two chips physically separated by 20 cm and with an optical separation of around 70 m.
Entangling Mechanical Motion with Microwave Fields
This result demonstrates an essential requirement for using compact and low-loss micromechanical oscillators in a quantum processor, can be extended to sense forces beyond the standard quantum limit, and may enable tests of quantum theory.
Entangled mechanical oscillators
Deterministic entanglement of separated mechanical oscillators is demonstrated, consisting of the vibrational states of two pairs of atomic ions held in different locations, and quantum entanglements in a degree of freedom that pervades the classical world are shown.
Entanglement of propagating optical modes via a mechanical interface
Continuous variable entanglement is described between two optical modes mediated by a mechanical oscillator, which paves the way for mechanical systems enabling long-distance quantum information networking over optical fiber networks.
Stationary entangled radiation from micromechanical motion
This work observes stationary emission of path-entangled microwave radiation from a parametrically driven 30-micrometre-long silicon nanostring oscillator, squeezing the joint field operators of two thermal modes by 3.4 decibels below the vacuum level.
Circuit cavity electromechanics in the strong-coupling regime
The basic circuit architecture presented here provides a feasible path to ground-state cooling and subsequent coherent control and measurement of long-lived quantum states of mechanical motion and is in excellent quantitative agreement with recent theoretical predictions.
State Transfer Between a Mechanical Oscillator and Microwave Fields in the Quantum Regime
Recently, macroscopic mechanical oscillators have been coaxed into a regime of quantum behavior, by direct refrigeration [1] or a combination of refrigeration and laser-like cooling [2, 3]. This
Unconditional quantum teleportation
The first realization of unconditional quantum teleportation where every state entering the device is actually teleported is realized, using squeezed-state entanglement.