The Experts below are selected from a list of 246339 Experts worldwide ranked by ideXlab platform
Xiaojun Wang - One of the best experts on this subject based on the ideXlab platform.
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the effect of quantum noise on two different deterministic remote State preparation of an arbitrary three Particle State protocols
Quantum Information Processing, 2018Co-Authors: Le Sun, Mingming Wang, Xiaojun WangAbstract:Multi-Particle quantum State deterministic remote preparation is a fundamental and important technical branch in quantum communication. Since quantum noise is unavoidable in realistic quantum communication, it is important to analyze the effect of noise on multi-Particle quantum communication protocols. In this paper, we study the effects of noise, such as amplitude damping, phase damping, bit-flip and depolarizing noises, on two deterministic remote preparation of an arbitrary three-Particle State protocols, which are based on two different entangled channels, namely $$\chi $$ State and Brown State. The detailed mathematical analysis shows that the output States of two deterministic remote State preparation (DRSP) protocols are the same in the same noisy environment. That is to say, in the same noisy environment, the effects of noise on two DRSP protocols are the same. This conclusion proves that these two DRSP protocols will produce the same arbitrary three-Particle States in the same noise channel environment, and so that these protocols are inherently convergent and can be substituted for each other in certain circumstances. In addition, this paper also takes three-Particle States $$a\left| {000} \right\rangle + b{\mathrm{e}^{ic}}\left| {111} \right\rangle $$ as an example and studies the relationship between the fidelity, the target State and the size of the noise factor. The results show that if the target State can be selected, an appropriate target State can effectively resist on the bit-flip noise. If the target State cannot be selected, as the increase in the size of noise factor, the fidelities of the two DRSP schemes in the amplitude damping noise and phase damping noise are always larger than those in the bit-flip noise and depolarizing noise. This conclusion indicates that two protocols have better resistance on amplitude damping and phase damping noise than the bit-flip and depolarizing noises. These findings and analyses will provide valid help in deterministic remote preparation of an arbitrary three-Particle State in a noisy environment.
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effect of quantum noise on deterministic remote State preparation of an arbitrary two Particle State via various quantum entangled channels
Quantum Information Processing, 2017Co-Authors: Mingming Wang, Le Sun, Xiaojun WangAbstract:As one of important research branches of quantum communication, deterministic remote State preparation (DRSP) plays a significant role in quantum network. Quantum noises are prevalent in quantum communication, and it can seriously affect the safety and reliability of quantum communication system. In this paper, we study the effect of quantum noise on deterministic remote State preparation of an arbitrary two-Particle State via different quantum channels including the \(\chi \) State, Brown State and GHZ State. Firstly, the output States and fidelities of three DRSP algorithms via different quantum entangled channels in four noisy environments, including amplitude-damping, phase-damping, bit-flip and depolarizing noise, are presented, respectively. And then, the effects of noises on three kinds of preparation algorithms in the same noisy environment are discussed. In final, the theoretical analysis proves that the effect of noise in the process of quantum State preparation is only related to the noise type and the size of noise factor and independent of the different entangled quantum channels. Furthermore, another important conclusion is given that the effect of noise is also independent of how to distribute intermediate Particles for implementing DRSP through quantum measurement during the concrete preparation process. These conclusions will be very helpful for improving the efficiency and safety of quantum communication in a noisy environment.
Mingming Wang - One of the best experts on this subject based on the ideXlab platform.
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the effect of quantum noise on two different deterministic remote State preparation of an arbitrary three Particle State protocols
Quantum Information Processing, 2018Co-Authors: Le Sun, Mingming Wang, Xiaojun WangAbstract:Multi-Particle quantum State deterministic remote preparation is a fundamental and important technical branch in quantum communication. Since quantum noise is unavoidable in realistic quantum communication, it is important to analyze the effect of noise on multi-Particle quantum communication protocols. In this paper, we study the effects of noise, such as amplitude damping, phase damping, bit-flip and depolarizing noises, on two deterministic remote preparation of an arbitrary three-Particle State protocols, which are based on two different entangled channels, namely $$\chi $$ State and Brown State. The detailed mathematical analysis shows that the output States of two deterministic remote State preparation (DRSP) protocols are the same in the same noisy environment. That is to say, in the same noisy environment, the effects of noise on two DRSP protocols are the same. This conclusion proves that these two DRSP protocols will produce the same arbitrary three-Particle States in the same noise channel environment, and so that these protocols are inherently convergent and can be substituted for each other in certain circumstances. In addition, this paper also takes three-Particle States $$a\left| {000} \right\rangle + b{\mathrm{e}^{ic}}\left| {111} \right\rangle $$ as an example and studies the relationship between the fidelity, the target State and the size of the noise factor. The results show that if the target State can be selected, an appropriate target State can effectively resist on the bit-flip noise. If the target State cannot be selected, as the increase in the size of noise factor, the fidelities of the two DRSP schemes in the amplitude damping noise and phase damping noise are always larger than those in the bit-flip noise and depolarizing noise. This conclusion indicates that two protocols have better resistance on amplitude damping and phase damping noise than the bit-flip and depolarizing noises. These findings and analyses will provide valid help in deterministic remote preparation of an arbitrary three-Particle State in a noisy environment.
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effect of quantum noise on deterministic remote State preparation of an arbitrary two Particle State via various quantum entangled channels
Quantum Information Processing, 2017Co-Authors: Mingming Wang, Le Sun, Xiaojun WangAbstract:As one of important research branches of quantum communication, deterministic remote State preparation (DRSP) plays a significant role in quantum network. Quantum noises are prevalent in quantum communication, and it can seriously affect the safety and reliability of quantum communication system. In this paper, we study the effect of quantum noise on deterministic remote State preparation of an arbitrary two-Particle State via different quantum channels including the \(\chi \) State, Brown State and GHZ State. Firstly, the output States and fidelities of three DRSP algorithms via different quantum entangled channels in four noisy environments, including amplitude-damping, phase-damping, bit-flip and depolarizing noise, are presented, respectively. And then, the effects of noises on three kinds of preparation algorithms in the same noisy environment are discussed. In final, the theoretical analysis proves that the effect of noise in the process of quantum State preparation is only related to the noise type and the size of noise factor and independent of the different entangled quantum channels. Furthermore, another important conclusion is given that the effect of noise is also independent of how to distribute intermediate Particles for implementing DRSP through quantum measurement during the concrete preparation process. These conclusions will be very helpful for improving the efficiency and safety of quantum communication in a noisy environment.
Le Sun - One of the best experts on this subject based on the ideXlab platform.
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the effect of quantum noise on two different deterministic remote State preparation of an arbitrary three Particle State protocols
Quantum Information Processing, 2018Co-Authors: Le Sun, Mingming Wang, Xiaojun WangAbstract:Multi-Particle quantum State deterministic remote preparation is a fundamental and important technical branch in quantum communication. Since quantum noise is unavoidable in realistic quantum communication, it is important to analyze the effect of noise on multi-Particle quantum communication protocols. In this paper, we study the effects of noise, such as amplitude damping, phase damping, bit-flip and depolarizing noises, on two deterministic remote preparation of an arbitrary three-Particle State protocols, which are based on two different entangled channels, namely $$\chi $$ State and Brown State. The detailed mathematical analysis shows that the output States of two deterministic remote State preparation (DRSP) protocols are the same in the same noisy environment. That is to say, in the same noisy environment, the effects of noise on two DRSP protocols are the same. This conclusion proves that these two DRSP protocols will produce the same arbitrary three-Particle States in the same noise channel environment, and so that these protocols are inherently convergent and can be substituted for each other in certain circumstances. In addition, this paper also takes three-Particle States $$a\left| {000} \right\rangle + b{\mathrm{e}^{ic}}\left| {111} \right\rangle $$ as an example and studies the relationship between the fidelity, the target State and the size of the noise factor. The results show that if the target State can be selected, an appropriate target State can effectively resist on the bit-flip noise. If the target State cannot be selected, as the increase in the size of noise factor, the fidelities of the two DRSP schemes in the amplitude damping noise and phase damping noise are always larger than those in the bit-flip noise and depolarizing noise. This conclusion indicates that two protocols have better resistance on amplitude damping and phase damping noise than the bit-flip and depolarizing noises. These findings and analyses will provide valid help in deterministic remote preparation of an arbitrary three-Particle State in a noisy environment.
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effect of quantum noise on deterministic remote State preparation of an arbitrary two Particle State via various quantum entangled channels
Quantum Information Processing, 2017Co-Authors: Mingming Wang, Le Sun, Xiaojun WangAbstract:As one of important research branches of quantum communication, deterministic remote State preparation (DRSP) plays a significant role in quantum network. Quantum noises are prevalent in quantum communication, and it can seriously affect the safety and reliability of quantum communication system. In this paper, we study the effect of quantum noise on deterministic remote State preparation of an arbitrary two-Particle State via different quantum channels including the \(\chi \) State, Brown State and GHZ State. Firstly, the output States and fidelities of three DRSP algorithms via different quantum entangled channels in four noisy environments, including amplitude-damping, phase-damping, bit-flip and depolarizing noise, are presented, respectively. And then, the effects of noises on three kinds of preparation algorithms in the same noisy environment are discussed. In final, the theoretical analysis proves that the effect of noise in the process of quantum State preparation is only related to the noise type and the size of noise factor and independent of the different entangled quantum channels. Furthermore, another important conclusion is given that the effect of noise is also independent of how to distribute intermediate Particles for implementing DRSP through quantum measurement during the concrete preparation process. These conclusions will be very helpful for improving the efficiency and safety of quantum communication in a noisy environment.
Xianfeng Chen - One of the best experts on this subject based on the ideXlab platform.
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probabilistic teleportation of a three Particle State via three pairs of entangled Particles
Physical Review A, 2003Co-Authors: Jianxing Fang, Xianfeng ChenAbstract:A scheme for teleporting an arbitrary three-Particle State is proposed when three pairs of entangled Particles are used as quantum channels. Quantum teleportation can be successfully realized with a certain probability if the receiver adopts an appropriate unitary-reduction strategy. The probability of successful teleportation is determined by the smallest coefficients of the three entangled pairs.
R Holman - One of the best experts on this subject based on the ideXlab platform.
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superhorizon entanglement entropy from Particle decay in inflation
Journal of High Energy Physics, 2014Co-Authors: Louis Lello, D. Boyanovsky, R HolmanAbstract:In inflationary cosmology all Particle States decay as a consequence of the lack of kinematic thresholds. The decay of an initial single Particle State yields an entangled quantum State of the product Particles. We generalize and extend a manifestly unitary field theoretical method to obtain the time evolution of the quantum State. We consider the decay of a light scalar field with mass M ≪ H with a cubic coupling in de Sitter space-time. Radiative corrections feature an infrared enhancement manifest as poles in � = M 2 /3H 2 and we obtain the quantum State
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superhorizon entanglement entropy from Particle decay in inflation
arXiv: Cosmology and Nongalactic Astrophysics, 2013Co-Authors: Louis Lello, D. Boyanovsky, R HolmanAbstract:In inflationary cosmology all Particle States decay as a consequence of the lack of kinematic thresholds. The decay of an initial single Particle State yields an \emph{entangled quantum State of the product Particles}. We generalize and extend a manifestly unitary field theoretical method to obtain the time evolution of the quantum State. We consider the decay of a light scalar field with mass $M\ll H$ with a cubic coupling in de Sitter space-time. Radiative corrections feature an infrared enhancement manifest as poles in $\Delta=M^2/3H^2$ and we obtain the quantum State in an expansion in $\Delta$. To leading order in $\Delta$ the pure State density matrix describing the decay of a Particle with sub-horizon wavevector is dominated by the emission of superhorizon quanta, describing \emph{entanglement between superhorizon and subhorizon fluctuations and correlations across the horizon}. Tracing over the superhorizon degrees of freedom yields a mixed State density matrix from which we obtain the entanglement entropy. Asymptotically this entropy grows with the \emph{physical} volume as a consequence of more modes of the decay products crossing the Hubble radius. A generalization to localized wave packets is provided. The cascade decay of single Particle States into many Particle States is discussed. We conjecture on \emph{possible} impact of these results on non-gaussianity and on the ``low multipole anomalies'' of the CMB.