scholarly journals Quantum Information Transmission Using CNOT Gate

2021 ◽  
Author(s):  
Ankit Sharma ◽  
Manisha J Nene
Keyword(s):  
Quantum Mechanics ◽  
Quantum Information ◽  
Information Transmission ◽  
Quantum Entanglement ◽  
Quantum Teleportation ◽  
Entanglement Swapping ◽  
Cnot Gate ◽  
Wave Collapse

We are at the dawn of quantum era; research efforts are been made on quantum information transmission techniques. Properties of quantum mechanics poses unique challenges in terms of wave collapse function, No cloning theorem and reversible operations. Quantum teleportation and quantum entanglement swapping based architecture are utilized to transmit qubit. In this paper we propose an approach to transmit qubits using controlled NOT gate (CNOT) gates and implement it on quantum machine.

scholarly journals Covariance Matrices under Bell-like Detections

2013 ◽  
Vol 20 (02) ◽  
pp. 1350011 ◽  
Author(s):  
Gaetana Spedalieri ◽  
Carlo Ottaviani ◽  
Stefano Pirandola
Keyword(s):  
Quantum Information ◽  
Quantum Teleportation ◽  
Simple Formula ◽  
Beam Splitter ◽  
Entanglement Swapping ◽  
Covariance Matrices ◽  
Heterodyne Detection ◽  
Realistic Condition ◽  
Bell Measurement ◽  
Beam Splitters

We derive a simple formula for the transformation of an arbitrary covariance matrix of (n + 2) bosonic modes under general Bell-like detections, where the last two modes are combined in an arbitrary beam splitter (i.e., with arbitrary transmissivity) and then homodyned. In particular, we consider the realistic condition of non-unit quantum efficiency for the homodyne detectors. This formula can easily be specialized to describe the standard Bell measurement and the heterodyne detection, which are exploited in many contexts, including protocols of quantum teleportation, entanglement swapping and quantum cryptography. In its general form, our formula can be adopted to study quantum information protocols in the presence of experimental imperfections and asymmetric setups, e.g., deriving from the use of unbalanced beam splitters.

On measures of quantum entanglement — A brief review

2016 ◽  
Vol 14 (06) ◽  
pp. 1640024 ◽  
Author(s):  
Debasis Sarkar
Keyword(s):  
Quantum Mechanics ◽  
Information Processing ◽  
Quantum Information ◽  
Quantum Entanglement ◽  
Quantum Correlation ◽  
Composite System ◽  
Quantum Information Processing ◽  
Bipartite Entanglement

Entanglement is one of the most useful resources in quantum information processing. It is effectively the quantum correlation between different subsystems of a composite system. Mathematically, one of the most hard tasks in quantum mechanics is to quantify entanglement. However, progress in this field is remarkable but not complete yet. There are many things to do with quantification of entanglement. In this review, we will discuss some of the important measures of bipartite entanglement.

scholarly journals Modeling tripartite entanglement in quantum protocols using evolving entangled hypergraphs

2018 ◽  
Vol 16 (07) ◽  
pp. 1850055 ◽  
Author(s):  
Linda Anticoli ◽  
Masoud Gharahi Ghahi
Keyword(s):  
Quantum Mechanics ◽  
Quantum Information ◽  
Data Structures ◽  
Quantum Key Distribution ◽  
Quantum Teleportation ◽  
Key Distribution ◽  
Quantum States ◽  
Tripartite Entanglement ◽  
Quantum Protocols

The notion of entanglement is the most well-known nonclassical correlation in quantum mechanics, and a fundamental resource in quantum information and computation. This correlation, which is displayed by certain classes of quantum states, is of utmost importance when dealing with protocols, such as quantum teleportation, cryptography and quantum key distribution. In this paper, we exploit a classification of tripartite entanglement by introducing the concepts of entangled hypergraph and evolving entangled hypergraph as data structures suitable to model quantum protocols which use entanglement. Finally, we present a few examples to provide applications of this model.

Quantum Mechanics

2021 ◽  
Author(s):  
Arjun Berera ◽  
Luigi Del Debbio
Keyword(s):  
Mechanical Properties ◽  
Quantum Mechanics ◽  
Angular Momentum ◽  
Quantum Information ◽  
Quantum Entanglement ◽  
Quantum States ◽  
Quantum Mechanical ◽  
Mathematical Skills ◽  
Key Concepts ◽  
Modern Textbook

Designed for a two-semester advanced undergraduate or graduate level course, this distinctive and modern textbook provides students with the physical intuition and mathematical skills to tackle even complex problems in quantum mechanics with ease and fluency. Beginning with a detailed introduction to quantum states and Dirac notation, the book then develops the overarching theoretical framework of quantum mechanics, before explaining physical quantum mechanical properties such as angular momentum and spin. Symmetries and groups in quantum mechanics, important components of current research, are covered at length. The second part of the text focuses on applications, and includes a detailed chapter on quantum entanglement, one of the most exciting modern applications of quantum mechanics, and of key importance in quantum information and computation. Numerous exercises are interspersed throughout the text, expanding upon key concepts and further developing students' understanding. A fully worked solutions manual and lecture slides are available for instructors.

scholarly journals Entanglement enhanced distinguishability of coherence-breaking channels

2019 ◽  
Vol 17 (04) ◽  
pp. 1950036
Author(s):  
Long-Mei Yang ◽  
Tao Li ◽  
Shao-Ming Fei ◽  
Zhi-Xi Wang
Keyword(s):  
Quantum Mechanics ◽  
Information Processing ◽  
Quantum Information ◽  
Quantum Entanglement ◽  
Error Probability ◽  
Quantum Information Processing ◽  
Superposition Principle ◽  
Important Resource ◽  
Minimal Error ◽  
Different Types

Originating from the superposition principle in quantum mechanics, coherence has been extensively studied as a kind of important resource in quantum information processing. We investigate the distinguishability of coherence-breaking channels with the help of quantum entanglement. By explicitly computing the minimal error probability of channel discrimination, it is shown that entanglement can enhance the capacity of coherence-breaking channel distinguishability with same types for some cases while it cannot be enhanced for some other cases. For coherence-breaking channels with different types, the channel distinguishability cannot be enhanced via entanglement.

Experimental Measurement of Quantum Entanglement and Quantum Information Remote Control

2010 ◽  
Vol 33 ◽  
pp. 55-60 ◽  
Author(s):  
Z.G. Wang
Keyword(s):  
Quantum Mechanics ◽  
Quantum Information ◽  
Remote Control ◽  
Quantum Entanglement ◽  
Experimental Measurement ◽  
Quantum Communication ◽  
Implementation Plan ◽  
Distinctive Features ◽  
Remote Preparation

Quantum entanglement is one of the distinctive features of quantum mechanics, which is an effective approach to realize quantum communication. This article introduces the fundamental principles of quantum entanglement and proposes an implementation plan for remote preparation and measurement of quantum information.

Quantum Information Delay Protocol Using Entanglement Swapping

2012 ◽  
Vol 569 ◽  
pp. 657-661
Author(s):  
Xiao Yu Li ◽  
Wei Mei Zhi
Keyword(s):  
Quantum Mechanics ◽  
Quantum Information ◽  
Entanglement Swapping ◽  
The Other ◽  
Bell States ◽  
Other Hand ◽  
Information Delay ◽  
The One

In this paper we provide a quantum information delay protocol using entanglement swapping. By sharing Bell states one person can give the other person some information which cannot be read until he or she lets the latter do. The principles of quantum mechanics guarantee that the protocol is unconditionally secure. When the one decides to let the other get the information, he or she needs only to send some dictates through a public classical channel. So the protocol is easier to carry out and more robust in practice. On the other hand it can be more efficient and more secure than previous protocols.

scholarly journals Beyond Causal Explanation: Einstein’s Principle Not Reichenbach’s

Entropy ◽  
2021 ◽  
Vol 23 (1) ◽  
pp. 114
Author(s):  
Michael Silberstein ◽  
William Mark Stuckey ◽  
Timothy McDevitt
Keyword(s):  
Quantum Mechanics ◽  
Quantum Information ◽  
Causal Explanation ◽  
Causal Structure ◽  
Minkowski Spacetime ◽  
Physical Principle ◽  
Causal Principle ◽  
Complete Rejection ◽  
Epr Correlations ◽  
Tsirelson Bound

Our account provides a local, realist and fully non-causal principle explanation for EPR correlations, contextuality, no-signalling, and the Tsirelson bound. Indeed, the account herein is fully consistent with the causal structure of Minkowski spacetime. We argue that retrocausal accounts of quantum mechanics are problematic precisely because they do not fully transcend the assumption that causal or constructive explanation must always be fundamental. Unlike retrocausal accounts, our principle explanation is a complete rejection of Reichenbach’s Principle. Furthermore, we will argue that the basis for our principle account of quantum mechanics is the physical principle sought by quantum information theorists for their reconstructions of quantum mechanics. Finally, we explain why our account is both fully realist and psi-epistemic.

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