scholarly journals Preserving photon qubits in an unknown quantum state with Knill dynamical decoupling: towards an all optical quantum memory

2015 ◽  
Author(s):  
Manish K. Gupta ◽  
Erik J. Navarro ◽  
Todd A. Moulder ◽  
Jason D. Mueller ◽  
Ashkan Balouchi ◽  
...  
Keyword(s):  
Quantum State ◽  
Quantum Memory ◽  
Dynamical Decoupling ◽  
All Optical ◽  
Unknown Quantum State

scholarly journals Preserving photon qubits in an unknown quantum state with Knill dynamical decoupling: Towards an all optical quantum memory

2015 ◽  
Vol 91 (3) ◽  
Author(s):  
Manish K. Gupta ◽  
Erik J. Navarro ◽  
Todd A. Moulder ◽  
Jason D. Mueller ◽  
Ashkan Balouchi ◽  
...  
Keyword(s):  
Quantum State ◽  
Quantum Memory ◽  
Dynamical Decoupling ◽  
All Optical ◽  
Unknown Quantum State

Relative tomography of an unknown quantum state

2009 ◽  
Vol 79 (2) ◽  
Author(s):  
D. Mogilevtsev ◽  
J. Řeháček ◽  
Z. Hradil
Keyword(s):  
Quantum State ◽  
Unknown Quantum State

scholarly journals Practical quantum teleportation of an unknown quantum state

2017 ◽  
Vol 95 (5) ◽  
pp. 498-503
Author(s):  
Syed Tahir Amin ◽  
Aeysha Khalique
Keyword(s):  
Quantum State ◽  
Quantum Teleportation ◽  
Bell State ◽  
Linear Optics ◽  
State Measurement ◽  
Dark Counts ◽  
Experimental Parameters ◽  
Unknown Quantum State ◽  
Down Conversion ◽  
Good Agreement

We present our model to teleport an unknown quantum state using entanglement between two distant parties. Our model takes into account experimental limitations due to contribution of multi-photon pair production of parametric down conversion source, inefficiency, dark counts of detectors, and channel losses. We use a linear optics setup for quantum teleportation of an unknown quantum state by the sender performing a Bell state measurement. Our theory successfully provides a model for experimentalists to optimize the fidelity by adjusting the experimental parameters. We apply our model to a recent experiment on quantum teleportation and the results obtained by our model are in good agreement with the experimental results.

scholarly journals Deterministic quantum teleportation through fiber channels

2018 ◽  
Vol 4 (10) ◽  
pp. eaas9401 ◽  
Author(s):  
Meiru Huo ◽  
Jiliang Qin ◽  
Jialin Cheng ◽  
Zhihui Yan ◽  
Zhongzhong Qin ◽  
...  
Keyword(s):  
Communication Networks ◽  
Quantum State ◽  
Optical Fibers ◽  
Quantum Teleportation ◽  
Continuous Variable ◽  
Entangled State ◽  
Optical Modes ◽  
Unknown Quantum State ◽  
Einstein Podolsky Rosen ◽  
Fiber Channels

Quantum teleportation, which is the transfer of an unknown quantum state from one station to another over a certain distance with the help of nonlocal entanglement shared by a sender and a receiver, has been widely used as a fundamental element in quantum communication and quantum computation. Optical fibers are crucial information channels, but teleportation of continuous variable optical modes through fibers has not been realized so far. Here, we experimentally demonstrate deterministic quantum teleportation of an optical coherent state through fiber channels. Two sub-modes of an Einstein-Podolsky-Rosen entangled state are distributed to a sender and a receiver through a 3.0-km fiber, which acts as a quantum resource. The deterministic teleportation of optical modes over a fiber channel of 6.0 km is realized. A fidelity of 0.62 ± 0.03 is achieved for the retrieved quantum state, which breaks through the classical limit of1/2. Our work provides a feasible scheme to implement deterministic quantum teleportation in communication networks.

The implementation of universal quantum memory and gates based on large-scale diamond surface

2016 ◽  
Vol 14 (05) ◽  
pp. 1650026
Author(s):  
Xiao-Ning Qi ◽  
Yong Zhang
Keyword(s):  
Quantum State ◽  
Large Scale ◽  
Quantum Memory ◽  
Quantum Gate ◽  
Nitrogen Vacancy ◽  
Diamond Surface ◽  
Single Qubit ◽  
Model Based ◽  
Universal Quantum ◽  
Jc Model

Nitrogen-vacancy (NV) centers implanted beneath the diamond surface have been demonstrated to be effective in the processing of controlling and reading-out. In this paper, NV center entangled with the fluorine nuclei collective ensemble is simplified to Jaynes–Cummings (JC) model. Based on this system, we discussed the implementation of quantum state storage and single-qubit quantum gate.

scholarly journals Twenty Years of Quantum State Teleportation at the Sapienza University in Rome

Entropy ◽  
2019 ◽  
Vol 21 (8) ◽  
pp. 768 ◽  
Author(s):  
Francesco De De Martini ◽  
Fabio Sciarrino
Keyword(s):  
Quantum Mechanics ◽  
Quantum Optics ◽  
Quantum State ◽  
Quantum Teleportation ◽  
Feed Forward ◽  
Unknown Quantum State ◽  
University Of Rome ◽  
The University ◽  
First Time

Quantum teleportation is one of the most striking consequence of quantum mechanics and is defined as the transmission and reconstruction of an unknown quantum state over arbitrary distances. This concept was introduced for the first time in 1993 by Charles Bennett and coworkers, it has then been experimentally demonstrated by several groups under different conditions of distance, amount of particles and even with feed forward. After 20 years from its first realization, this contribution reviews the experimental implementations realized at the Quantum Optics Group of the University of Rome La Sapienza.

scholarly journals Quantum Storage of Single-Photon and Two-Photon Fock States with an All-Optical Quantum Memory

2019 ◽  
Vol 122 (21) ◽  
Author(s):  
M. Bouillard ◽  
G. Boucher ◽  
J. Ferrer Ortas ◽  
B. Pointard ◽  
R. Tualle-Brouri
Keyword(s):  
Single Photon ◽  
Quantum Memory ◽  
Fock States ◽  
Two Photon ◽  
All Optical

scholarly journals Weak cloning of an unknown quantum state

2006 ◽  
Vol 354 (5-6) ◽  
pp. 396-398 ◽  
Author(s):  
Erik Sjöqvist ◽  
Johan Åberg
Keyword(s):  
Quantum State ◽  
Unknown Quantum State
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