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Efficient storage of telecom-band quantum optical information represents a crucial milestone for establishing distributed quantum optical networks. Erbium ions in crystalline hosts provide a promising platform for telecom quantum memories;…

Quantum Physics · Physics 2024-12-10 Zongfeng Li , Yisheng Lei , Trevor Kling , Mahdi Hosseini

Quantum frequency conversion (QFC) in nonlinear optical media is a powerful tool for temporal-mode selective manipulation of light. Recent attempts at achieving high mode selectivities and/or fidelities have had to resort to…

Optics · Physics 2017-06-13 Dileep V. Reddy , Michael G. Raymer

Quantum communication promises unprecedented capabilities enabled by the transmission of quantum states of light. However, current implementations face severe distance limitations due to photon loss. Silicon carbide (SiC) defects have…

Quantum frequency conversion is unavoidable for a true quantum communication network as most quantum memories work in the visible spectrum. Here, we propose a unique design of a quantum frequency converter based on a ring-Mach Zehnder…

Quantum Physics · Physics 2025-01-14 Mrinmoy Kundu , Bejoy Sikder , Mark Earnshaw , A. Sayem

High-dimensional photonic entanglement is a promising candidate for error-protected quantum information processing with improved capacity. Encoding high-dimensional qudits in the carrier frequency of photons combines ease of generation,…

Protocols for processing of quantum information are the foundation of quantum technology, enabling to share secrets at a distance, teleport quantum states, and to implement quantum computation. While many protocols were realized, and even…

Quantum Physics · Physics 2024-11-21 Alon Eldan , Ofek Gilon , Asher Lagemi , Elai Fishman Furman , Avi Pe'er

Parametric frequency converters (PFCs) play a critical role in bridging the frequency gap between quantum information carriers. PFCs in the microwave band are particularly important for superconducting quantum processors, but their…

Quantum Physics · Physics 2025-03-13 Yufeng Wu , Chaofan Wang , Danqing Wang , Mingrui Xu , Yiyu Zhou , Hong X. Tang

As a key component of quantum networks, the quantum router distributes quantum information among different quantum nodes. The silicon-vacancy (SiV) center in diamond offers a promising platform for quantum technology due to its strong…

Quantum Physics · Physics 2026-02-24 Wen-Jie Zhang , Xi Yan , Jun-Hong An

A crucial open problem in large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access…

Quantum Physics · Physics 2013-09-13 Jing Zhang , Yu-xi Liu , Sahin Kaya Ozdemir , Re-Bing Wu , Feifei Gao , Xiang-Bin Wang , Lan Yang , Franco Nori

Quantum networks enhance quantum communication schemes and link multiple users over large areas. Harnessing high dimensional quantum states - i.e. qu-d-its - allows for a denser transfer of information with increased robustness to noise…

We investigate a quantum integrated communication and computation (QICC) scheme for a single-mode bosonic multiple-access channel (MAC) with coherent-state signalling. By exploiting the natural superposition property of the quantum MAC, a…

Information Theory · Computer Science 2026-04-10 Ioannis Krikidis

We report the experimental demonstration of four-photon quantum interference using telecom-wavelength photons. Realization of multi-photon quantum interference is essential to linear optics quantum information processing and…

Quantum Physics · Physics 2013-05-30 Masahiro Yabuno , Ryosuke Shimizu , Yasuyoshi Mitsumori , Hideo Kosaka , Keiichi Edamatsu

Atomic defects in solid-state materials are promising candidates for quantum interconnect and networking applications. Recently, a series of atomic defects have been identified in the silicon platform, where scalable device integration can…

Quantum Physics · Physics 2023-11-01 Adam Johnston , Ulises Felix-Rendon , Yu-En Wong , Songtao Chen

Quantum walks are central to a wide range of applications such as quantum search, quantum information processing, and entanglement transport. Gaining control over the duration and the direction of quantum walks (QWs) is crucial to…

We show that quantum frequency conversion (QFC) can overcome the spectral distinguishability common to inhomogeneously broadened solid-state quantum emitters. QFC is implemented by combining single photons from an InAs quantum dot (QD) at…

Controlling the properties of single photons is essential for a wide array of emerging optical quantum technologies spanning quantum sensing, quantum computing, and quantum communications. Essential components for these technologies include…

Quantum key distribution (QKD) provides an attractive means for securing communications in optical fibre networks. However, deployment of the technology has been hampered by the frequent need for dedicated dark fibres to segregate the very…

Quantum dense coding (QDC) means to transmit two classical bits by only transferring one quantum bit, which has enabled high-capacity information transmission and strengthened system security. Continuousvariable QDC offers a promising…

Quantum Physics · Physics 2024-04-17 Shaocong Liang , Jialin Cheng , Jiliang Qin , Jiatong Li , Yi Shi , Zhihui Yan , Xiaojun Jia , Changde Xie , Kunchi Peng

Quantum security improves cryptographic protocols by applying quantum mechanics principles, assuring resistance to both quantum and conventional computer attacks. This work addresses these issues by integrating Quantum Key Distribution…

Cryptography and Security · Computer Science 2025-02-18 Tasmin Karim , Md. Shazzad Hossain Shaon , Md. Fahim Sultan , Mst Shapna Akter

Quantum transduction between microwave and optical photons plays a key role in quantum communication among remote qubits. Although the quantum transduction schemes generating communication photons have been successfully demonstrated by…

Quantum Physics · Physics 2023-10-18 Byunggi Kim , Hodaka Kurokawa , Katsuta Sakai , Kazuki Koshino , Hideo Kosaka , Masahiro Nomura
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