Simple Scheme for Preparation of Six-photon Entangled States via Cross-Kerr Medium

2011 ◽  
Vol 40 (10) ◽  
pp. 1469-1473
Author(s):  
朱孟正 ZHU Meng-zheng ◽  
赵春然 ZHAO Chun-ran
2015 ◽  
Vol 13 (05) ◽  
pp. 1550024 ◽  
Author(s):  
Meiyu Wang ◽  
Fengli Yan

We show how to prepare three different types of four-photon polarization entangled states among four modes. The scheme only use cross-Kerr medium, polarization beam splitters and X homodyne measurements on coherent light fields, which can be efficiently implemented in quantum optical laboratories. GHZ states and symmetric Dick states can be generated in deterministic way based on the scheme. With the possible availability of suitable strong Kerr nonlinearity, another type of entangled state called genuine four-photon entangled state can be realized as well.


2000 ◽  
Vol 53 (6) ◽  
pp. 799 ◽  
Author(s):  
Shi-Biao Zheng

A simple scheme is proposed for the generation of maximally entangled states for several separated cavities, in which each cavity is in a one-photon state or in the vacuum state. In the scheme a laddertype three-level atom is sent through the cavities and additional classical fields. The whole system finally evolves into a state, which is given by the product of the highly entangled field state with an atomic state.


2007 ◽  
Vol 05 (01n02) ◽  
pp. 83-88
Author(s):  
ROSANNA MIGLIORE ◽  
ANTONINO MESSINA

We present a simple scheme for the preparation of entangled states of the e.m. modes of two spatially separated microwave cavities exploiting their interaction with two superconducting SQUID rings embedded within them. The scheme requires that the two SQUID qubits are initially prepared in an entangled state and the possibility of controlling both the coupling strengths and the interaction times. We also briefly discuss the importance of such a theoretical scheme in view of possible applications in the context of quantum computing and its experimental feasibility.


2012 ◽  
Vol 21 (4) ◽  
pp. 044209 ◽  
Author(s):  
Gui-Long Gao ◽  
Fu-Quan Song ◽  
Shou-Sheng Huang ◽  
Hui Wang ◽  
Xian-Zhang Yuan ◽  
...  

2007 ◽  
Vol 270 (2) ◽  
pp. 290-295 ◽  
Author(s):  
Sergey A. Podoshvedov ◽  
Ba An Nguyen ◽  
Jaewan Kim

2011 ◽  
Vol 09 (05) ◽  
pp. 1299-1306 ◽  
Author(s):  
XIU LIN ◽  
WAN-JUN SU

Recently, a genuine five-qubit entangled state [Formula: see text] has been proposed by Man et al. In this paper, we present a simple scheme for generating such a state in ion trap and cavity QED, respectively. This study offers a new approach to faithful controlled teleportation of an arbitrary two-qubit state in these two systems.


2016 ◽  
Vol 30 (02) ◽  
pp. 1550269
Author(s):  
M. Rohith ◽  
C. Sudheesh ◽  
R. Rajeev

We study theoretically the dynamics of entangled states created in a beam splitter with a nonlinear Kerr medium placed into one input arm. Entanglement dynamics of initial classical and nonclassical states are studied and compared. Signatures of revival and fractional revival phenomena exhibited during the time evolution of states in the Kerr medium are captured in the entangled states produced by the beam splitter. Dynamics of entanglement shows local minima at the instants of fractional revivals. These minima correspond to the generation of two-component Schrödinger cat states or multi-component Schrödinger cat-like states if the initial state considered is a coherent state. Maximum entanglement is obtained at the instants of collapses of wave packets in the medium. Our analysis shows increase in entanglement with increase in the degree of nonclassicality of the initial states considered. We show that the states generated at the output of the beam splitter using initial nonclassical states are more robust against decoherence due to photon absorption by an environment than those formed by an initial classical state.


Author(s):  
Vladimir Gavrilov ◽  
Tatyana Antipova ◽  
Yan Vlasov ◽  
Sergey Ardatov ◽  
Anastasia Ardatova

In their previous works , leading their history since 1988, the authors of this article have repeatedly conceptually shown and experimentally verified the results of research on the teleportation of information between macro objects. Early author's works were performed during the existence of the Russian Federation – as a country called the Union of Soviet Socialist Republics (USSR). Some of which were marked "Top Secret" - links further down the text. Since they were performed under the supervision of the relevant special services and further "Department of external relations of the Russian Academy of Sciences". The authors used numerous examples to demonstrate the possibility of teleportation of information in macro-systems, including ecosystem, biogeocenotic levels, and then tissue and organism levels. Successful experimental verifications occurred only in cases when all the principles and rules laid down in the theory of quantum information, applied to biological objects, were correctly combined. Namely, the preparation of cascades of entangled States was performed both on the mental and somatic levels. In full accordance with the principle of complementarity and taking into account the fact that the observer and the observed are actively connected by the sum of similarities. In addition, the role of the classical communication channel in this process was performed by carrier electromagnetic fields modulated by a useful signal. This signal represented a cast of the simulated experimental process. An example of a real COVID-19 pandemic is the verification of author's works in nature on a biogeocenotic scale. And certainly with anthropogenic – so to speak-participation.


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