Testing Bell’s inequality and measuring the entanglement using superconducting nanocircuits

He, Guang-Ping; Zhu, Shining; Wang, Z. D.; Li, Huazhong

doi:10.1103/physreva.68.012315

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…Our investigation is based on the spin matrix structure of the S-matrix itself, which allows to deduce any polarization configuration of the outgoing particles in dependence of the incoming particles, for which even spin entanglement can be accounted for. We point out that the generation of entanglement is studied for example for the polarization of photons [66], internal electronic states of trapped ions [67], the spin of electron-hole pairs in solids [68], charge qubits in superconducting nanocircuits [69] or polarization and orbital angular momentum of photons [70] (see also [71]) and is therefore of interest for the scientific community.…”

Section: Introductionmentioning

confidence: 99%

Spin in Compton scattering with pronounced polarization dynamics

Ahrens

Sun

2017

Phys. Rev. A

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We theoretically investigate a scattering configuration in Compton scattering, in which the orientation of the electron spin is reversed and simultaneously, the photon polarization changes from linear polarization into circular polarization. The intrinsic angular momentum of electron and photon are computed along the coincident propagation direction of the incoming and outgoing photon. We find that this intrinsic angular momentum is not conserved in the considered scattering process. We also discuss the generation of entanglement for the considered scattering setup and present an angle dependent investigation of the corresponding differential cross section, Stokes parameters and spin expectation.Comment: 15 pages, 13 figure

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Section: Introductionmentioning

confidence: 99%

Spin in Compton scattering with pronounced polarization dynamics

Ahrens

Sun

2017

Phys. Rev. A

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“…This loophole was closed in two recent experiments (Weihs et al, 1998;Tittel et al, 1998). It is now obvious that to close both loopholes simultaneously in the same experiment still remains a challenge (He et al, 2003). I believe that there may be a way simultaneously around both of these problems if we utilize two entangled human neuronal basins in the following manner.…”

Section: A New Technique For Resolving the Bell Inequality Loopholes ...mentioning

confidence: 99%

“…The second loophole, that of locality, states that whenever measurements are performed on two spatially separated particles, any possibility of signals propagating with a speed equal or less than the velocity of light between the two parts of the apparatus must be excluded (He et al, 2003). This loophole was closed in two recent experiments (Weihs et al, 1998;Tittel et al, 1998).…”

Section: A New Technique For Resolving the Bell Inequality Loopholes ...mentioning

confidence: 99%

An interdisciplinary approach to certain fundamental issues in the fields of physics and biology: towards a unified theory

Thaheld¹

2005

Biosystems

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Recent experiments appear to have revealed the possibility of the existence of quantum entanglement between spatially separated human subjects. In addition, a similar condition might exist between basins containing human neurons adhering to printed circuit boards. In both instances, preliminary data indicates what appear to be non-local correlations between brain electrical activities in the case of the human subjects and also non-local correlations between neuronal basin electrical activities, implying entanglement at the macroscopic level. If the ongoing expanded research and the analysis of same continues to support this hypothesis, it may then make it possible to simultaneously address some of the fundamental problems facing us in both physics and biology through the adoption of an interdisciplinary empirical approach based on Bell's experimental philosophy, with the goal of unifying these two fields.

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“…One of the examples is two two-level atoms interacting with an electromagnetic field. [16] Another example is coupling two charge qubits through an interaction with a single-mode cavity field, [17] and the entanglement between two charge qubits induced by a coherent state field has been discussed. [18] The interaction of the thermal field and a quantum system composed of two qubits has been studied and it has been found that such a chaotic field with minimal information can nevertheless entangle qubits that are prepared initially in a separable state.…”

Section: Introductionmentioning

confidence: 99%

Generation of Entanglement Between Two Noninteracting Qubits via Interaction with Nonclassical Radiation Field

Zou¹,

Cai²,

Shao³

et al. 2005

Commun. Theor. Phys.

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We study the interaction between a single-mode quantized field and a quantum system composed of two qubits. We suppose that two qubits initially be prepared in the mixed and separable state, and study how entanglement between two qubits arises in the course of evolution according to the Jaynes–Cummings type interaction with nonclassical radiation field. We also investigate the relation between entanglement and purity of qubit subsystem. We show that different photon statistics have different effects on the dynamical behavior of the qubit subsystem. When the qubits are initially prepared in the maximally mixed and separable state, for coherent state field we cannot find entanglement between two qubits; for squeezed state field entanglement between two qubits exists in several short period of time; for even and odd coherent state fields of large photon number, the dynamical behavior of the entanglement between two qubits shows collapse and revival phenomenon. For odd coherent state field of small photon number, the entanglement with both qubits initially prepared in maximally mixed state can be stronger than that with both qubits initially prepared in pure states. For fields of small photon number, the entanglement strongly depends on the states they are initially prepared in. For coherent state field, and odd and even coherent state fields of large photon number, the entanglement only depends on the purity of the initial state of qubit subsystem. We also show that during the evolution the unentangled state may be purer than the entangled state, and the maximum degree of entanglement may not occur at the time when the qubit subsystem is in the purist state.

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Testing Bell’s inequality and measuring the entanglement using superconducting nanocircuits

Cited by 15 publications

References 31 publications

Spin in Compton scattering with pronounced polarization dynamics

Spin in Compton scattering with pronounced polarization dynamics

An interdisciplinary approach to certain fundamental issues in the fields of physics and biology: towards a unified theory

Generation of Entanglement Between Two Noninteracting Qubits via Interaction with Nonclassical Radiation Field

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