Exploring entanglement with the help of quantum state measurement

2014 ◽  
Vol 82 (10) ◽  
pp. 962-971 ◽  
Author(s):  
E. Dederick ◽  
M. Beck
Keyword(s):  
Quantum State ◽  
State Measurement

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.

Single photon quantum state measurement scheme for quantum circuit logic operation

2020 ◽  
Vol 49 (2) ◽  
pp. 205002
Author(s):  
王志远 Wang Zhiyuan ◽  
张子静 Zhang Zijing ◽  
赵 远 Zhao Yuan
Keyword(s):  
Quantum State ◽  
Single Photon ◽  
Quantum Circuit ◽  
Logic Operation ◽  
Measurement Scheme ◽  
State Measurement

scholarly journals Experimental Quantum State Measurement with Classical Shadows

2021 ◽  
Vol 127 (20) ◽  
Author(s):  
Ting Zhang ◽  
Jinzhao Sun ◽  
Xiao-Xu Fang ◽  
Xiao-Ming Zhang ◽  
Xiao Yuan ◽  
...  
Keyword(s):  
Quantum State ◽  
State Measurement

HIERARCHICAL AND PROBABILISTIC QUANTUM STATE SHARING WITH A NONMAXIMALLY FOUR-QUBIT CLUSTER STATE

2013 ◽  
Vol 11 (01) ◽  
pp. 1350004 ◽  
Author(s):  
JIA-YIN PENG ◽  
ZHI-WEN MO
Keyword(s):  
Quantum State ◽  
Cluster State ◽  
Success Probability ◽  
Bell State ◽  
The Other ◽  
Lower Grade ◽  
Quantum State Sharing ◽  
Projective Measurement ◽  
Two Agents ◽  
State Measurement

A scheme that probabilistically realizing hierarchical quantum state sharing of an arbitrary unknown qubit state with a nonmaximally four-qubit cluster state is presented in this paper. In the scheme, the sender Alice distributes a quantum secret with a Bell-state measurement and publishes her measurement outcomes via a classical channel to three agents who are divided into two grades. One agent is in the upper grade while other two agents are in the lower grade. Then introducing an ancillary qubit, the agent of the upper grade only needs the assistance of any one of the other two agents for probabilistically getting the secret, while an agent of the lower grade needs the help of all the other two agents by implementing a controlled-NOT operation and a proper positive operator-valued measurement instead of usual projective measurement. In other words, the agents of two different grades have different authorities to reconstruct Alice's secret by a probabilistic manner. Moreover, the total success probability and the maximum success probability of the scheme are also worked out.

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