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In quantum networks, one way to communicate is to distribute entanglements through swapping at intermediate nodes. Most existing work primarily aims to create efficient two-party end-to-end entanglement over long distances. However, some…

In the circuit quantum electrodynamics architectures, to realize a long-range quantum network mediated by flying photon, it is necessary to shape the temporal profile of emitted photons to achieve high transfer efficiency between two…

On-demand creation of entanglement between distant qubits is a necessary ingredient for distributed quantum computation. We propose an entanglement scheme that allows for single-shot deterministic entanglement creation by detecting a single…

Mesoscale and Nanoscale Physics · Physics 2017-05-18 Christoph Ohm , Fabian Hassler

The wave-particle duality of light has led to two different encodings for optical quantum information processing. Several approaches have emerged based either on particle-like discrete-variable states, e.g. finite-dimensional quantum…

Quantum Physics · Physics 2014-07-04 Olivier Morin , Kun Huang , Jianli Liu , Hanna Le Jeannic , Claude Fabre , Julien Laurat

We propose a cavity-QED scheme for the controlled generation of sequences of entangled single-photon wavepackets. A photon is created inside a cavity via an active medium, such as an atom, and decays into the continuum of radiation modes…

Quantum Physics · Physics 2009-10-31 K. M. Gheri , C. Saavedra , P. Toermae , J. I. Cirac , P. Zoller

We propose a scheme for optical entanglement distribution in quantum networks based on a quasi-deterministic entangled photon pair source. By combining heralded photonic Bell pair generation with spectral mode conversion to interface with…

Quantum Physics · Physics 2023-06-16 Kevin C. Chen , Prajit Dhara , Mikkel Heuck , Yuan Lee , Wenhan Dai , Saikat Guha , Dirk Englund

A wireless quantum network is generated between multi-hop, where each hop consists of two entangled nodes. These nodes share a finite number of entangled two qubit systems randomly. Different types of wireless quantum bridges are generated…

Quantum Physics · Physics 2015-06-19 N. Metwally

We present a scalable star-shaped quantum key distribution (QKD) optical fiber network. We use wavelength-division demultiplexing (WDM) of broadband photon pairs to establish key exchange between multiple pairs of participants…

The desire to have a source of single entangled photon pairs can be satisfied using single quantum dots as emitters. However, we are not bound to pursue only polarization entanglement, but can also exploit other degrees of freedom. In this…

Quantum Physics · Physics 2016-09-12 Gregor Weihs , Tobias Huber , Ana Predojević

A key challenge towards future quantum internet technology is connecting quantum processors at metropolitan scale. Here, we report on heralded entanglement between two independently operated quantum network nodes separated by 10km. The two…

A time-bin qubit is a promising candidate qubit for advanced quantum information processing systems operating over optical fibers or integrated quantum photonic circuits. However, the single- and two-qubit operations of time-bin qubits have…

Quantum Physics · Physics 2014-06-25 Hiroki Takesue

Entanglement swapping between photon pairs generated at physically separated nodes over telecommunication fiber infrastructure is an essential step towards the quantum internet, enabling applications such as quantum repeaters, blind quantum…

We propose a protocol to perform long-range distribution of near-maximally entangled multiphoton states, allowing versatile applications such as quantum key distribution (QKD) and quantum metrology which can provide alternatives to…

Quantum Physics · Physics 2023-01-12 Monika E. Mycroft , Thomas McDermott , Adam Buraczewski , Magdalena Stobińska

Entanglement serves as a fundamental resource for quantum technologies, enabling communication and computation tasks that surpass classical limits. Its distribution across networks is essential for interconnecting quantum processors,…

Long range quantum information processing will require the integration of different technologies to form hybrid architectures combining the strengths of multiple quantum systems. In this work, we propose a hybrid networking architecture…

Quantum Physics · Physics 2021-06-02 John Hannegan , James D. Siverns , Jake Cassell , Qudsia Quraishi

Unlike other quantum hardware, photonic quantum architectures can produce millions of qubits from a single device. However, controlling photonic qubits remains challenging, even at small scales, due to their weak interactions, making…

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…

Quantum network facilitates the secure transmission of information between different users. Establishing communication links among multiple users in a scalable and efficient way is important for realizing a large-scale quantum network. Here…

Quantum Physics · Physics 2022-09-07 Wenjun Wen , Zhiyu Chen , Liangliang Lu , Wenhan Yan , Wenyi Xue , Peiyu Zhang , Yanqing Lu , Shining Zhu , Xiao-song Ma

Encoding quantum information in photonic time-bin states is typically considered impractical for moving free-space quantum communication due to the difficulties with phase stabilization of distant quantum time-bin interferometers and…

We report observations of entanglement of two remote atomic qubits, achieved by generating an entangled state of an atomic qubit and a single photon at Site A, transmitting the photon to Site B in an adjacent laboratory through an optical…

Quantum Physics · Physics 2009-11-11 D. N. Matsukevich , T. Chaneliere , S. D. Jenkins , S. -Y. Lan , T. A. B. Kennedy , A. Kuzmich