We investigate dynamical generation of macroscopic nonlocal entanglements between two remote massive magnon-superconducting-circuit hybrid systems. Two fiber-coupled microwave cavities are employed to serve as an interaction channel connecting two sets of macroscopic hybrid units each containing a magnon sphere and a superconducting-circuit qubit. The structure of the hybrid system allows the existence of an optimal fiber coupling strength that requests the shortest amount of time to generate a systematic maximal entanglement, which is solely dependent on the couplings of the channel with both magnon and superconducting circuit. Our theoretical results are shown to be within the scope of specific parameters that can be easily achieved with current technology. The noise effects on the implementation of systems are also treated in a general environment suggesting the robustness of our results. Our discrete-variable qubit-like entanglement theory of magnons may lead to direct applications in various quantum information tasks.We investigate dynamical generation of macroscopic nonlocal entanglements between two remote massive magnon-superconducting-circuit hybrid systems. Two fiber-coupled microwave cavities are employed to serve as an interaction channel connecting two sets of macroscopic hybrid units each containing a magnon sphere and a superconducting-circuit qubit. The structure of the hybrid system allows the existence of an optimal fiber coupling strength that requests the shortest amount of time to generate a systematic maximal entanglement, which is solely dependent on the couplings of the channel with both magnon and superconducting circuit. Our theoretical results are shown to be within the scope of specific parameters that can be easily achieved with current technology. The noise effects on the implementation of systems are also treated in a general environment suggesting the robustness of our results. Our discrete-variable qubit-like entanglement theory of magnons may lead to direct applications in various quantum information tasks.

Jun 11, 20200 citations

Macroscopic Effects of Quantum Entanglement

Časlav Brukner, Vlatko Vedral, Anton Zeilinger

Bulletin of the American Physical SocietyMar 23, 20050 citations

Quantum Tunneling Meets Macroscopic Entanglement via Transfer Learning — E8 Intelligence Research

Andrew Stewart Caldin

FINDING: Quantum tunneling and macroscopic entanglement are experimentally accessible, with transfer learning bridging classical and quantum neural architectures. | MATH: No explicit equations in the raw search results; however, the physics of macroscopic quantum tunneling scales with the WKB exponent $\exp\left(-\frac{2}{\hbar}\int_{x_1}^{x_2}\sqrt{2m(V(x)-E)}\,dx\right)$ , and entanglement tomography of macroscopic mechanical objects implies Bell-type inequalities and density matrix reconstruction via $\rho = \sum_{ij} \rho_{ij} |i\rangle\langle j|$ . The hybrid transfer learning paper (arXiv:1912.08278) uses variational quantum circuits with parameterized gates $U(\theta) = \prod e^{-i\theta_k H_k}$ , and classical-quantum feature maps $\phi(x) \to |\psi(x)\rangle$ . | CONNECTION: The WKB tunneling exponent contains an action integral — for a parabolic barrier, the transmission probability yields $T \sim e^{-2\pi E/\hbar\omega}$ , where the exponent $2\pi$ connect Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.comFINDING: Quantum tunneling and macroscopic entanglement are experimentally accessible, with transfer learning bridging classical and quantum neural architectures. | MATH: No explicit equations in the raw search results; however, the physics of macroscopic quantum tunneling scales with the WKB exponent $ \exp\left(-\frac{2}{\hbar}\int_{x_1}^{x_2}\sqrt{2m(V(x)-E)}\,dx\right) $, and entanglement tomography of macroscopic mechanical objects implies Bell-type inequalities and density matrix reconstruction via $ \rho = \sum_{ij} \rho_{ij} |i\rangle\langle j| $. The hybrid transfer learning paper (arXiv:1912.08278) uses variational quantum circuits with parameterized gates $ U(\theta) = \prod e^{-i\theta_k H_k} $, and classical-quantum feature maps $ \phi(x) \to |\psi(x)\rangle $. | CONNECTION: The WKB tunneling exponent contains an action integral — for a parabolic barrier, the transmission probability yields $ T \sim e^{-2\pi E/\hbar\omega} $, where the exponent $ 2\pi $ connect Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Oct 5, 20260 citations

Entanglement and Quantum Superposition of a Macroscopic-Macroscopic system

F. De Martini

arXiv:0903.1992Foundations of PhysicsFeb 4, 20107 citations

Entangling microscopic defects via a macroscopic quantum shuttle

Grigorij J. Grabovskij, Pavel A. Bushev, Jared H. Cole +4 more

In the microscopic world, multipartite entanglement has been achieved with various types of nanometer-sized two-level systems such as trapped ions, atoms and photons. On the macroscopic scale ranging from micrometers to millimeters, recent experiments have demonstrated bipartite and tripartite entanglement for electronic quantum circuits with superconducting Josephson junctions. It remains challenging to bridge these largely different length scales by constructing hybrid quantum systems. Doing so may allow us to manipulate the entanglement of individual microscopic objects separated by macroscopically large distances in a quantum circuit. Here we report on the experimental demonstration of induced coherent interaction between two intrinsic two-level states (TLSs) formed by atomic-scale defects in a solid via a superconducting phase qubit. The tunable superconducting circuit serves as a shuttle communicating quantum information between the two microscopic TLSs. We present a detailed comparison between experiment and theory and find excellent agreement over a wide range of parameters. We then use the theoretical model to study the creation and movement of entanglement between the three components of the quantum system.In the microscopic world, multipartite entanglement has been achieved with various types of nanometer-sized two-level systems such as trapped ions, atoms and photons. On the macroscopic scale ranging from micrometers to millimeters, recent experiments have demonstrated bipartite and tripartite entanglement for electronic quantum circuits with superconducting Josephson junctions. It remains challenging to bridge these largely different length scales by constructing hybrid quantum systems. Doing so may allow us to manipulate the entanglement of individual microscopic objects separated by macroscopically large distances in a quantum circuit. Here we report on the experimental demonstration of induced coherent interaction between two intrinsic two-level states (TLSs) formed by atomic-scale defects in a solid via a superconducting phase qubit. The tunable superconducting circuit serves as a shuttle communicating quantum information between the two microscopic TLSs. We present a detailed comparison between experiment and theory and find excellent agreement over a wide range of parameters. We then use the theoretical model to study the creation and movement of entanglement between the three components of the quantum system.

arXiv:1102.5037New Journal of PhysicsJun 9, 201112 citations

\exp\left(-\frac{2}{\hbar}\int_{x_1}^{x_2}\sqrt{2m(V(x)-E)}\,dx\right)

, and entanglement tomography of macroscopic mechanical objects implies Bell-type inequalities and density matrix reconstruction via

\rho = \sum_{ij} \rho_{ij} |i\rangle\langle j|

. The hybrid transfer learning paper (arXiv:1912.08278) uses variational quantum circuits with parameterized gates

U(\theta) = \prod e^{-i\theta_k H_k}

, and classical-quantum feature maps

\phi(x) \to |\psi(x)\rangle

. | CONNECTION: The WKB tunneling exponent contains an action integral — for a parabolic barrier, the transmission probability yields

T \sim e^{-2\pi E/\hbar\omega}

, where the exponent

2\pi

connect Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com