Entanglement between distant macroscopic mechanical and spin systems

@article{Thomas2020EntanglementBD,
  title={Entanglement between distant macroscopic mechanical and spin systems},
  author={Rodrigo A. Thomas and Michał Parniak and Christoffer {\O}stfeldt and Christoffer B. M{\o}ller and Christian B{\ae}rentsen and Y Tsaturyan and Albert Schliesser and Jürgen Appel and Emil Zeuthen and Eugene Simon Polzik},
  journal={Nature Physics},
  year={2020},
  volume={17},
  pages={228-233}
}
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 entanglement between increasingly macroscopic and disparate systems is an ongoing effort in quantum science, as it enables hybrid quantum networks, quantum-enhanced sensing and probing of the fundamental limits of quantum theory. The disparity of hybrid systems and the vulnerability of quantum correlations… 
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References

SHOWING 1-10 OF 62 REFERENCES
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
Stabilized entanglement of massive mechanical oscillators
TLDR
Quantum entanglement is demonstrated in a system of massive micromechanical oscillators coupled to a microwave-frequency electromagnetic cavity by driving the devices into a steady state that is entangled.
Experimental long-lived entanglement of two macroscopic objects
TLDR
The robust and long-lived entanglement of material objects demonstrated here to be useful in quantum information processing, including teleportation of quantum states of matter and quantum memory is expected.
Remote quantum entanglement between two micromechanical oscillators
TLDR
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.
Entanglement generated by dissipation and steady state entanglement of two macroscopic objects.
TLDR
An experiment where dissipation continuously generates entanglement between two macroscopic objects is reported on, achieved by engineering the dissipation using laser and magnetic fields and leading to robust event-readyEntanglement maintained for 0.04 s at room temperature.
Unconditional Steady-State Entanglement in Macroscopic Hybrid Systems by Coherent Noise Cancellation.
TLDR
This work proposes and analyze a generic approach to steady-state entanglement generation between two oscillators with different temperatures and decoherence properties coupled in cascade to a common unidirectional light field and finds its unconditional scheme to deliver a virtually identical performance when operated optimally.
Dissipatively driven entanglement of two macroscopic atomic ensembles
Up to date, the life time of experimentally demonstrated entangled states has been limited, due to their fragility under decoherence and dissipation. Therefore, they are created under strict
Macroscopic Quantum Mechanics: Theory and Experimental Concepts of Optomechanics
Rapid experimental progress has recently allowed the use of light to prepare macroscopic mechanical objects into nearly pure quantum states. This research field of quantum optomechanics opens new
Dissipative versus conditional generation of Gaussian entanglement and spin squeezing
Spin squeezing of collective atomic spins can be achieved conditionally via probing with light and subsequent homodyne detection, as is done in a Quantum Nondemolition measurement. Recently it has
Quantum state preparation and macroscopic entanglement in gravitational-wave detectors
Long-baseline laser-interferometer gravitational-wave GW detectors are operating at a factor of 10 in amplitude above the standard quantum limit SQL within a broad frequency band in the sense that f
...
...