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Efficient superdense coding with W States

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS 2018年第7期57卷 1935-1941页

作者： Zhou, You-Sheng Wang, Feng Luo, Ming-Xing Chongqing Univ Coll Comp Sci Chongqing 400044 Peoples R China Chongqing Univ Posts & Telecommun Sch Cyber Secur & Informat Law Chongqing 400065 Peoples R China Dezhou Univ Coll Math Sci Dezhou 253023 Peoples R China Southwest Jiaotong Univ Informat Secur & Natl Comp Grid Lab Chengdu 610031 Sichuan Peoples R China

superdense coding is a distinct property of quantum entanglement. In this paper, we show that the bipartite three-particle W state can transmit 3 bits by sending two qubits using single qubit operations. This has justified previous conjecture (Agrawal and Pati, Phys. Rev. A 74(6), 062320 2006). Similar result holds for hyperentangled W states.

关键词： superdense coding W states Hyperentangled W states LOCC

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superdense coding with Uniformly Accelerated Particle

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INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS 2017年第3期56卷 706-719页

作者： Farahmand, Mehrnoosh Mohammadzadeh, Hosein Mehri-Dehnavi, Hossein Rahimi, Robabeh Univ Mohaghegh Ardabili Dept Phys POB 179 Ardebil Iran Babol Noshirvani Univ Technol Dept Phys Babol Sar *** Iran Islamic Azad Univ Dept Phys Sci & Res Branch Tehran Iran

We study superdense coding with uniformly accelerated particle in single mode approximation and beyond single mode approximation. We use four different functions, the capacity of superdense coding, negativity, discord and the probability of success for evaluating the final results. In single mode approximation, all the four functions behave as expected, however in beyond single mode approximation, except the probability of success, the other three functions represent peculiar behaviors at least for special ranges where the beyond single mode approximation is strong.

关键词： superdense coding Non-inertial frame Single and beyond single mode approximation

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superdense coding facilitated by hyper-entanglement and quantum networks 2

Superdense coding facilitated by hyper-entanglement and quan...

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Conference on Ultrafast Bandgap Photonics II

作者： Smith, James F., III Naval Res Lab Code 5741 Washington DC 20375 USA

ISBN: (数字)9781510608887

ISBN: (纸本)9781510608870;9781510608887

A method of generating superdense coding based on quantum hyper-entanglement and facilitated by quantum networks is discussed. superdense coding refers to the coding of more than one classical bit into each qubit. Quantum hyperentanglement refers to quantum entanglement in more than one degree of freedom, e.g. polarization, energy-time, and orbital angular momentum (OAM). The new superdense coding scheme permits 2L bits to be encoded into each qubit where L is the number of degrees of freedom used for quantum hyper-entanglement. The superdense coding procedure is based on a generalization of the Bell state for L degrees of freedom. Theory describing the structure, generation/transmission, and detection of the generalized Bell state is developed. Circuit models are provided describing the generation/transmission process and detection process. Detection processes are represented mathematically as projection operators. A mathematical proof that that the detection scheme permits the generalized Bell states to be distinguished with 100% probability is provided. Measures of effectiveness (MOEs) are derived for the superdense coding scheme based on open systems theory represented in terms of density operators. Noise and loss related to generation/transmission, detection and propagation are included. The MOEs include various probabilities, quantum Chernoff bound, a measure of the number of message photons that must be transmitted to successfully send and receive a message, SNR and the quantum Cramer Rao' lower bound. Quantum networks with quantum memory are used to increase the efficiency of the superdense coding scheme.

关键词： superdense coding generalized Bell state Bell state measurement and generation hyper-entanglement quantum network/repeater teleportation entanglement swapping quantum memory SWAPC quantum sensing Bell state measurement

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Extension and Analysis of Modified superdense-coding in Multi-User Environment 19

Extension and Analysis of Modified Superdense-Coding in Mult...

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19th IEEE International Conference on Intelligent Engineering Systems (INES)

作者： Berces, Marton Imre, Sandor Budapest Univ Technol & Econ Dept Networked Syst & Serv Budapest Hungary

Modified superdense coding for quantum systems was introduced for two communicating parties. In this paper the algorithm is extended to n parties. Beside the generalization, an analytical approach is also presented to... 详细信息

ISBN: (纸本)9781467379397

关键词： superdense coding qubit quantum systems modified superdense coding slotted ALOHA

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Quantum teleportation scheme using entangled two ququads and its noise effects

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QUANTUM INFORMATION PROCESSING 2024年第5期23卷 192-192页

作者： Randeep, N. C. Anukrishna, C. Raj, A. K. Neha Govt Arts & Sci Coll Dept Phys Calicut 673018 Kerala India SARBTM Govt Coll Dept Phys Koyilandy 673307 Kerala India AVAH Arts & Sci Coll Dept Phys Kozhikode 673523 Kerala India

We present a quantum teleportation scheme for single qubits, qutrits, and ququads using maximally entangled pairs of two ququads. Additionally, we demonstrate that, under a specific mapping, single ququad teleportation is equivalent to two-qubit teleportation using generalized Bell states. Furthermore, we establish a dense (superdense) coding scheme for sending four bits of classical information using a single ququad state. We also investigate the efficiency of the single ququad quantum teleportation scheme by studying the fidelity of teleportation when subjected to noise, such as amplitude damping, depolarizing channel, phase damping, and bit flip. Finally, we investigate noise effects in two qubit teleportation and compare its results with the ququad case. We observe that in both cases, adding more noise increases the fidelity of teleportation. Additionally, we show that qubit teleportation is more resilient to noise than ququad teleportation.

关键词： Quantum entanglement Quantum teleportation superdense coding Ququad Quantum noise Fidelity

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Teleporting digital images

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OPTICAL AND QUANTUM ELECTRONICS 2023年第6期55卷 1-33页

作者： Mastriani, Mario Florida Int Univ Knight Fdn Sch Comp & Informat Sci 11200 SW 8th St Miami FL 33199 USA

During the last 30 years the scientific community has coexisted with the most fascinating protocol due to Quantum Physics: quantum teleportation, which would have been impossible if quantum entanglement, so questioned by Einstein, did not exist. In this work, a complete architecture for the teleportation of Computational Basis States (CBS) is presented. Such CBS will represent each of the possible 24 classical bits commonly used to encode every pixel of a 3-color-channel image (red-green-blue, or cyan-yellow-magenta). For this purpose, a couple of interfaces: classical-to-quantum and quantum-to-classical are presented with two versions of the teleportation protocol: standard and simplified.

关键词： Interfaces Quantum communications Quantum entanglement Quantum teleportation superdense coding

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Understanding the Quantum Teleportation Protocol

Understanding the Quantum Teleportation Protocol

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2023 Congress in Computer Science, Computer Engineering, and Applied Computing, CSCE 2023

作者： Spranger, Kurt T. Grimaila, Michael R. Hodson, Douglas D. Air Force Institute of Technology Dept. of Systems Engineering and Mgmt. Wright-Patterson AFBOH United States Air Force Institute of Technology Dept. of Electrical & Computer Engineering Wright-Patterson AFBOH United States

ISBN: (纸本)9798350327595

Decomposing a complex system into smaller abstract functional blocks and developing mathematical models to represent their behavior is an important activity towards developing comprehensive system understanding. In this paper, we decompose the ideal Quantum Teleportation protocol into a collection of simple quantum circuit blocks, examine the behavior of each block, and show how collections of blocks operate to create more complex circuits. We believe this approach greatly simplifies the understanding of how the Quantum Teleportation protocol works. This paper is introductory in nature and is intended to help those who are new to modeling, simulating, and analyzing ideal quantum circuits. © 2023 IEEE.

关键词： Bell State Generation (BSG) Bell State Measurement (BSM) Einstein Podolsky Rosen (EPR) pairs quantum entanglement quantum teleportation superdense coding

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Quantum teleportation and superdense coding through the composite W-Bell channel

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QUANTUM INFORMATION PROCESSING 2013年第5期12卷 1957-1967页

作者： Zhang, Zhi-hua Shu, Lan Mo, Zhi-wen Univ Elect Sci & Technol China Sch Math Sci Chengdu 611731 Sichuan Provinc Peoples R China Sichuan Normal Univ Coll Math & Software Sci Chengdu 610068 Sichuan Provinc Peoples R China

The states of triqubit systems have an important category W states. A class of asymmetric W states |W (n) >(123) were proposed by Agrawal and Pati (Phys Rev A 74:062320, 2006). We introduce an entangled system composed of the |W (n) >(123) states and Bell pairs and show its utility for perfect teleportation and superdense coding.

关键词： Quantum teleportation superdense coding W state Bell-state

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Entanglement recovery in noisy binary quantum information protocols via three-qubit quantum error correction codes

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INTERNATIONAL JOURNAL OF QUANTUM INFORMATION 2023年第7期21卷 2340002-2340002页

作者： Morea, Alessio Notarnicola, Michele N. Olivares, Stefano Univ Milan Dipartimento Fis Aldo Pontremoli I-20133 Milan Italy Sez Milano INFN I-20133 Milan Italy

The task of preserving entanglement against noises is of crucial importance for both quantum communication and quantum information transfer. To this aim, quantum error correction (QEC) codes may be employed to compensate, at least partially, the detriments induced by environmental noise that can be modeled as a bit-flip or a phase-flip error channel. In this paper, we investigate the effects of the simple three-qubit QEC codes to restore entanglement and nonlocality in a two-qubit system and consider two practical applications: superdense coding and quantum teleportation. Though the considered three-qubit QEC codes are known to perfectly work in the presence of very small noise, we show that they can avoid the sudden death of entanglement and improve the performance of the addressed protocols also for larger noise amplitudes.

关键词： Quantum error correction superdense coding quantum teleportation

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N-qubit quantum teleportation, information splitting and superdense coding through the composite GHZ-Bell channel

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QUANTUM INFORMATION PROCESSING 2012年第2期11卷 615-628页

作者： Saha, Debashis Panigrahi, Prasanta K. IISER Kolkata Mohanpur Nadia 741252 W Bengal India

We introduce a general odd qubit entangled system composed of GHZ and Bell pairs and explicate its usefulness for quantum teleportation, information splitting and superdense coding. After demonstrating the superdense coding protocol on the five qubit system, we prove that '2N + 1' classical bits can be sent by sending 'N + 1' quantum bits using this channel. It is found that the five-qubit system is also ideal for arbitrary one qubit and two qubit teleportation and quantum information splitting (QIS). For the single qubit QIS, three different protocols are feasible, whereas for the two qubit QIS, only one protocol exists. Protocols for the arbitrary N-qubit state teleportation and quantum information splitting are then illustrated.

关键词： Entanglement von Neumann measurement Teleportation superdense coding Quantum information splitting

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