Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

物理

爱因斯坦的“幽灵”超距作用实现多方量子安全通信网

项玉, Qiongyi He, 龚旗煌

Published Jan 1, 2015• 0 citations
OpenAlex

Abstract

量子力学理论可以完美地描述自然界中最小的物理体系,比如原子和光子。正如1935年爱因斯坦、波多尔斯基、罗森在他们著名的Einstein—Podolsky—Rosen（EPR）佯谬中提出的[1],量子力学具有令人惊讶的特性：处于位置和动量理想关联量子态的一对粒子，一定时刻后在空间上完全分离，对其中一个粒子测量会瞬间影响相隔遥远的另一个粒子的性质，这被爱因斯坦称为“幽灵般”的超距作用。

Related papers

关于爱因斯坦“定域实在论”的新实验

戴闻

爱因斯坦坚信一个真实世界的存在：对于一个系统的测量结果，应由系统本身的物理性质决定，物性先于测量并且独立于测量（即所谓“实在论”，realism）。爱因斯坦同时认为，测量结果不会受到远距离事件的即时影响（即所谓“定域性”，locality，或者说，任何影响的传递都不可能超光速）。为了论证“定域一实在”论，爱因斯坦与Podolsky和Rosen于1935年联名发表了一篇文章，提出了两粒子纠缠问题——EPR纠缠态。

物理•Jan 1, 2007•0 citations

Detecting Einstein-Podolsky-Rosen steering through entanglement detection

Debarshi Das, Souradeep Sasmal, Sovik Roy

Quantum inseparabilities can be classified into three inequivalent forms: entanglement, Einstein-Podolsky-Rosen (EPR) steering, and Bell's nonlocality. Bell-nonlocal states form a strict subset of EPR steerable states which also form a strict subset of entangled states. Recently, EPR steerable states have been shown to be fundamental resources for one-sided device-independent quantum information processing tasks and, hence, identification of EPR steerable states becomes important from foundational as well as informational theoretic perspectives. In the present paper, we propose a criterion to detect whether a given two-qubit state is EPR steerable. From an arbitrary given two-qubit state, another two-qubit state is constructed in such a way that the given state is EPR steerable if the new constructed state is entangled. Hence, EPR steerability of an arbitrary two-qubit state can be detected by detecting entanglement of the newly constructed state. Apart from providing a distinctive way to detect EPR steering without using any steering inequality, the present paper also provides an alternative way to avoid locality loopholes in EPR steering tests and to reduce the ``complexity cost'' present in experimentally detecting EPR steering. We also generalize our criteria to detect EPR steering of higher dimensional quantum states. Finally, we illustrate our result by using our proposed technique to detect EPR steerability of various families of mixed states.

arXiv:1808.07848•Physical Review A•May 13, 2019•33 citations

How relativistic motion affects Einstein–Podolsky–Rosen steering

Wen‐Yang Sun, Dong Wang, Liu Ye

Abstract In this letter, the dynamic behavior of Einstein–Podolsky–Rosen (EPR) steering and the redistribution of EPR steering under a relativistic framework are investigated. Specifically, we explore the scenario that particle A held by Alice is in a flat space–time and another particle B held by Bob entangled with A is in a non-inertial framework. The results show that EPR steering from Alice to Bob is dramatically destroyed by the Unruh effect caused by the acceleration of Bob. Besides, EPR steering possess asymmetry, and EPR steering asymmetry increases with growing intensity of the Unruh effect, implying that the Unruh effect can bring about EPR steering asymmetry. Furthermore, the reduced physically accessible EPR steering from Alice to Bob is distributed to the physically inaccessible EPR steering (from Alice to anti-Bob or from Bob to anti-Bob). Notably, unlike entanglement and quantum discord, only one of the EPR steering from Alice to anti-Bob and Bob to anti-Bob experiences a sudden birth with increase in the acceleration parameter, which means that they cannot simultaneously survive. That is, the monogamous relationship of EPR steering is still tenable in such a scenario. Consequently, we believe that EPR steering could also serve as an important information resource within long-distance quantum secure communication under the relativistic framework.

arXiv:1611.05121•Laser Physics Letters•Aug 22, 2017•23 citations

全光三光纠缠交换（特邀）

朱琦琦 Zhu Qiqi, 刘胜帅 Liu Shengshuai, 荆杰泰 Jing Jietai

量子纠缠交换能够使两个从未发生直接相互作用的粒子产生纠缠，是实现量子中继的核心技术以及构建量子网络的关键环节。在连续变量量子体系中，传统三光纠缠交换中的Bell态测量过程涉及光电和电光转换，这限制了量子纠缠交换的带宽。因此，提出一种无需测量的全光三光纠缠交换方案。通过一个低噪声光学参量放大器来实现Bell态测量的功能，能够避免光电和电光转换过程中的带宽限制。分析结果表明，三光纠缠交换可以通过两种方案实现：其一是使用一对EPR（Einstein-Podolsky-Rosen）纠缠态作为量子通道；其二是使用两对EPR纠缠态作为量子通道。该研究提出了一种无需测量的全光宽带量子网络方案，为发展全光量子网络以及多节点间的全光量子通信提供了理论支撑。

Acta Optica Sinica•Jan 1, 2025•0 citations

对“EPR思维研究中的若干问题”一文的质问——兼评“对量子力学的一种新解释”

沈惠川

指出了“EPR思维研究中的若干问题”一文中的有关对Einstein的指摘与历史事实不符，阐述了该文与“对量子力学的一种新解释”一文中存在的物理错误，从而再次证实了量子力学Copenhagen诠释正在走向没落这一事实。

•Jun 1, 2005•0 citations

The Einstein-Podolsky-Rosen Paradox and Entanglement 1: Signatures of EPR correlations for continuous variables

M. D. Reid

A generalization of the 1935 Einstein-Podolsky-Rosen (EPR) argument for measurements with continuous variable outcomes is presented to establish criteria for the demonstration of the EPR paradox, for situations where the correlation between spatially separated subsystems is not perfect. Two types of criteria for EPR correlations are determined. The first type are based on measurements of the variances of conditional probability distributions and are necessary to reflect directly the situation of the original EPR paradox. The second weaker set of EPR criteria are based on the proven failure of (Bell-type) local realistic theories which could be consistent with a local quantum description for each subsystem. The relationship with criteria sufficient to prove entanglement is established, to show that any demonstration of EPR correlations will also signify entanglement. It is also shown how a demonstration of entanglement between two spatially separated subsystems, if not able to interpreted as a violation of a Bell-type inequality, may be interpreted as a demonstration of the EPR correlations. In particular it is explained how the experimental observation of two-mode squeezing using spatially separated detectors will signify not only entanglement but EPR correlations defined in a general sense.

arXiv:quant-ph/0112038•Dec 7, 2001•2 citations
量子力学理论可以完美地描述自然界中最小的物理体系,比如原子和光子。正如1935年爱因斯坦、波多尔斯基、罗森在他们著名的Einstein—Podolsky—Rosen（EPR）佯谬中提出的[1],量子力学具有令人惊讶的特性：处于位置和动量理想关联量子态的一对粒子，一定时刻后在空间上完全分离，对其中一个粒子测量会瞬间影响相隔遥远的另一个粒子的性质，这被爱因斯坦称为“幽灵般”的超距作用。
爱因斯坦坚信一个真实世界的存在：对于一个系统的测量结果，应由系统本身的物理性质决定，物性先于测量并且独立于测量（即所谓“实在论”，realism）。爱因斯坦同时认为，测量结果不会受到远距离事件的即时影响（即所谓“定域性”，locality，或者说，任何影响的传递都不可能超光速）。为了论证“定域一实在”论，爱因斯坦与Podolsky和Rosen于1935年联名发表了一篇文章，提出了两粒子纠缠问题——EPR纠缠态。
Quantum inseparabilities can be classified into three inequivalent forms: entanglement, Einstein-Podolsky-Rosen (EPR) steering, and Bell's nonlocality. Bell-nonlocal states form a strict subset of EPR steerable states which also form a strict subset of entangled states. Recently, EPR steerable states have been shown to be fundamental resources for one-sided device-independent quantum information processing tasks and, hence, identification of EPR steerable states becomes important from foundational as well as informational theoretic perspectives. In the present paper, we propose a criterion to detect whether a given two-qubit state is EPR steerable. From an arbitrary given two-qubit state, another two-qubit state is constructed in such a way that the given state is EPR steerable if the new constructed state is entangled. Hence, EPR steerability of an arbitrary two-qubit state can be detected by detecting entanglement of the newly constructed state. Apart from providing a distinctive way to detect EPR steering without using any steering inequality, the present paper also provides an alternative way to avoid locality loopholes in EPR steering tests and to reduce the ``complexity cost'' present in experimentally detecting EPR steering. We also generalize our criteria to detect EPR steering of higher dimensional quantum states. Finally, we illustrate our result by using our proposed technique to detect EPR steerability of various families of mixed states.
Abstract In this letter, the dynamic behavior of Einstein–Podolsky–Rosen (EPR) steering and the redistribution of EPR steering under a relativistic framework are investigated. Specifically, we explore the scenario that particle A held by Alice is in a flat space–time and another particle B held by Bob entangled with A is in a non-inertial framework. The results show that EPR steering from Alice to Bob is dramatically destroyed by the Unruh effect caused by the acceleration of Bob. Besides, EPR steering possess asymmetry, and EPR steering asymmetry increases with growing intensity of the Unruh effect, implying that the Unruh effect can bring about EPR steering asymmetry. Furthermore, the reduced physically accessible EPR steering from Alice to Bob is distributed to the physically inaccessible EPR steering (from Alice to anti-Bob or from Bob to anti-Bob). Notably, unlike entanglement and quantum discord, only one of the EPR steering from Alice to anti-Bob and Bob to anti-Bob experiences a sudden birth with increase in the acceleration parameter, which means that they cannot simultaneously survive. That is, the monogamous relationship of EPR steering is still tenable in such a scenario. Consequently, we believe that EPR steering could also serve as an important information resource within long-distance quantum secure communication under the relativistic framework.
量子纠缠交换能够使两个从未发生直接相互作用的粒子产生纠缠，是实现量子中继的核心技术以及构建量子网络的关键环节。在连续变量量子体系中，传统三光纠缠交换中的Bell态测量过程涉及光电和电光转换，这限制了量子纠缠交换的带宽。因此，提出一种无需测量的全光三光纠缠交换方案。通过一个低噪声光学参量放大器来实现Bell态测量的功能，能够避免光电和电光转换过程中的带宽限制。分析结果表明，三光纠缠交换可以通过两种方案实现：其一是使用一对EPR（Einstein-Podolsky-Rosen）纠缠态作为量子通道；其二是使用两对EPR纠缠态作为量子通道。该研究提出了一种无需测量的全光宽带量子网络方案，为发展全光量子网络以及多节点间的全光量子通信提供了理论支撑。
A generalization of the 1935 Einstein-Podolsky-Rosen (EPR) argument for measurements with continuous variable outcomes is presented to establish criteria for the demonstration of the EPR paradox, for situations where the correlation between spatially separated subsystems is not perfect. Two types of criteria for EPR correlations are determined. The first type are based on measurements of the variances of conditional probability distributions and are necessary to reflect directly the situation of the original EPR paradox. The second weaker set of EPR criteria are based on the proven failure of (Bell-type) local realistic theories which could be consistent with a local quantum description for each subsystem. The relationship with criteria sufficient to prove entanglement is established, to show that any demonstration of EPR correlations will also signify entanglement. It is also shown how a demonstration of entanglement between two spatially separated subsystems, if not able to interpreted as a violation of a Bell-type inequality, may be interpreted as a demonstration of the EPR correlations. In particular it is explained how the experimental observation of two-mode squeezing using spatially separated detectors will signify not only entanglement but EPR correlations defined in a general sense.