scholarly journals Connecting heterogeneous quantum networks by hybrid entanglement swapping

2020 ◽  
Vol 6 (22) ◽  
pp. eaba4508 ◽  
Author(s):  
Giovanni Guccione ◽  
Tom Darras ◽  
Hanna Le Jeannic ◽  
Varun B. Verma ◽  
Sae Woo Nam ◽  
...  
Keyword(s):  
Single Photon ◽  
Bell State ◽  
Entanglement Swapping ◽  
Entangled States ◽  
Heterogeneous Structure ◽  
Quantum Networks ◽  
Modular Systems ◽  
State Measurement ◽  
Future Networks ◽  
Different Types

Recent advances in quantum technologies are rapidly stimulating the building of quantum networks. With the parallel development of multiple physical platforms and different types of encodings, a challenge for present and future networks is to uphold a heterogeneous structure for full functionality and therefore support modular systems that are not necessarily compatible with one another. Central to this endeavor is the capability to distribute and interconnect optical entangled states relying on different discrete and continuous quantum variables. Here, we report an entanglement swapping protocol connecting such entangled states. We generate single-photon entanglement and hybrid entanglement between particle- and wave-like optical qubits and then demonstrate the heralded creation of hybrid entanglement at a distance by using a specific Bell-state measurement. This ability opens up the prospect of connecting heterogeneous nodes of a network, with the promise of increased integration and novel functionalities.

scholarly journals Hybrid Entanglement between Optical Discrete Polarizations and Continuous Quadrature Variables

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 552
Author(s):  
Jianming Wen ◽  
Irina Novikova ◽  
Chen Qian ◽  
Chuanwei Zhang ◽  
Shengwang Du
Keyword(s):  
Quantum Teleportation ◽  
Quantum Information Processing ◽  
Bell State ◽  
Entanglement Swapping ◽  
Hybrid Technique ◽  
Continuous Variables ◽  
Quantum Networks ◽  
Bell State Measurement ◽  
Two Photon ◽  
State Measurement

By coherently combining advantages while largely avoiding limitations of two mainstream platforms, optical hybrid entanglement involving both discrete and continuous variables has recently garnered widespread attention and emerged as a promising idea for building heterogenous quantum networks. In contrast to previous results, here we propose a new scheme to remotely generate hybrid entanglement between discrete polarization and continuous quadrature optical qubits heralded by two-photon Bell-state measurement. As a novel nonclassical light resource, we further use it to discuss two examples of ways—entanglement swapping and quantum teleportation—in which quantum information processing and communications could make use of this hybrid technique.

scholarly journals A nondestructive Bell-state measurement on two distant atomic qubits

2021 ◽  
Author(s):  
Stephan Welte ◽  
Philip Thomas ◽  
Lukas Hartung ◽  
Severin Daiss ◽  
Stefan Langenfeld ◽  
...  
Keyword(s):  
Measurement Techniques ◽  
Bell State ◽  
Repeated Measurements ◽  
Entangled States ◽  
Entangled State ◽  
Initial State ◽  
Quantum Networks ◽  
Maximally Entangled State ◽  
Network Nodes ◽  
State Measurement

AbstractOne of the most fascinating aspects of quantum networks is their capability to distribute entanglement as a nonlocal communication resource1. In a first step, this requires network-ready devices that can generate and store entangled states2. Another crucial step, however, is to develop measurement techniques that allow for entanglement detection. Demonstrations for different platforms3–13 suffer from being not complete, destructive or local. Here, we demonstrate a complete and nondestructive measurement scheme14–16 that always projects any initial state of two spatially separated network nodes onto a maximally entangled state. Each node consists of an atom trapped inside an optical resonator from which two photons are successively reflected. Polarization measurements on the photons discriminate between the four maximally entangled states. Remarkably, such states are not destroyed by our measurement. In the future, our technique might serve to probe the decay of entanglement and to stabilize it against dephasing via repeated measurements17,18.

QUANTUM AUTHENTICATION USING ENTANGLED STATES

2004 ◽  
Vol 15 (04) ◽  
pp. 609-617 ◽  
Author(s):  
XIAOYU LI ◽  
HOWARD BARNUM
Keyword(s):  
Bell State ◽  
Authentication Scheme ◽  
Entangled States ◽  
Bell State Measurement ◽  
Epr Pairs ◽  
State Measurement ◽  
Quantum Authentication ◽  
Einstein Podolsky Rosen

A quantum authentication scheme is presented in this paper. Two parties share Einstein-Podolsky-Rosen(EPR) pairs previously as the identification token. They create auxiliary EPR pairs to interact with the identification token. Then the authentication is accomplished by a complete Bell state measurement. This scheme is proved to be secure. If no errors and eavesdroppers exist in the transmission, the identification token is unchanged after the authentication. So it can be reused.

Single-photon Bell state measurement based on a quantum random walk

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Xiao-Xiao Chen ◽  
Jia-Zhi Yang ◽  
Xu-Dan Chai ◽  
An-Ning Zhang
Keyword(s):  
Random Walk ◽  
Single Photon ◽  
Bell State ◽  
Quantum Random Walk ◽  
Bell State Measurement ◽  
State Measurement

EFFICIENT SCHEME FOR TELEPORTATION OF UNKNOWN ATOMIC STATES USING NON-MAXIMALLY ENTANGLED STATES

2007 ◽  
Vol 21 (15) ◽  
pp. 923-927
Author(s):  
KUANG-WEI XIONG
Keyword(s):  
Cavity Qed ◽  
Bell State ◽  
Atomic State ◽  
Entangled States ◽  
Distinct Advantage ◽  
State Measurement ◽  
Cavity Decay ◽  
Efficient Scheme ◽  
Maximally Entangled States ◽  
Atomic States

We propose a feasible scheme for teleporting an unknown atomic state by using non-maximally entangled states in cavity QED. The distinct advantage of the scheme is that, not only can the teleportation and distillation procedure be realized simultaneously, but the scheme is also insensitive to the cavity decay and thermal field with the assistance of a strong classical driving field. In addition, the joint Bell-state measurement can be distinguished via detecting the atomic state.

Cyclic quantum teleportation of an unknown multi-particle high-dimension state

2020 ◽  
Vol 34 (05) ◽  
pp. 2050073
Author(s):  
Fan Wu ◽  
Ming-Qiang Bai ◽  
Yu-Chun Zhang ◽  
Ren-Ju Liu ◽  
Zhi-Wen Mo
Keyword(s):  
High Dimension ◽  
Quantum Teleportation ◽  
Bell State ◽  
Measurement Methods ◽  
Entangled States ◽  
Quantum Channels ◽  
State Measurement ◽  
Probabilistic Teleportation ◽  
Particle Measurement ◽  
Single Particle Measurement

In this paper, via 12-particle entangled states as quantum channels, two schemes for cyclic quantum teleportation are proposed by using two different measurement methods, one is the Bell state measurement, the other is single-particle measurement. Besides, these schemes can be generalized to realize the probabilistic teleportation of an unknown multi-particle high-dimension state. Furthermore, feasibility for the schemes and some conclusions are discussed at the end of this paper.

Sign in / Sign up

Export Citation Format

Share Document