TY - GEN
T1 - Optimizing Link-Level Entanglement Generation in Quantum Networks with Unequal Link Lengths
AU - Pathumsoot, Poramet
AU - Benchasattabuse, Naphan
AU - Satoh, Ryosuke
AU - Hajdusek, Michal
AU - Van Meter, Rodney
AU - Suwanna, Sujin
N1 - Funding Information:
ACKNOWLEDGMENT PP and SS acknowledge the financial support from the Program Management Unit for Human Resources & Institutional Development, Research and Innovation (grant number Fig. 2: Upper figure is a histogram of average waiting times of physical qubits encoded to logical qubit with and without an adjustment of pulse interval under 0.1dB/km. (Node 0, Repeater, Node 2) is position of each node relatively to origin, indicated each simulation setting.. Labels of Nodes 0 and 2 correspond to qubits at left and right nodes, respectively. A maximum limit of histogram plot was set to be 2,000 count. Distributions of qubit on Node 2 of (0, 25, 200), (0, 50, 200), and (0, 75, 200) configurations are stack exceed limit of the plot. Lower figure is a mean value of AWTPQ ordered by (0, 100, 200), (0, 75, 200), (0, 50, 200), and (0, 25, 200) B05F630108), Thailand. RV, MH and RS acknowledge support by the Air Force Office of Scientific Research under award number FA2386-19-1-4038.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Quantum internet offers a variety of applications that either enhance or surpass its classical counterpart. Quantum repeaters are imperative to a quantum network as they connect between two quantum nodes, and create quantum entanglement between two targeted nodes with entanglement swapping protocol which require resource from both connections. As a quantum state has a finite decoherent time, it is crucial that a connection protocol is performed efficiently and within suitable time interval, so that two end-To-end matter qubits are entangled. We simulate a second generation network of quantum repeaters, one that is capable of quantum error correction, to estimate the waiting time needed to establish connection between distant nodes. Simulations are performed for a linear chain of nodes with unequal path lengths, and loss rates. We find that asymmetry of path lengths contributes to the waiting time of physical qubits. By simply adjusting the photon generation rate from one of its nodes, the waiting time is reduced while the time to complete quantum state tomography remains unaffected. This simple adjustment can play important roles in compensating for distance asymmetry when a quantum repeater is not stationary.
AB - Quantum internet offers a variety of applications that either enhance or surpass its classical counterpart. Quantum repeaters are imperative to a quantum network as they connect between two quantum nodes, and create quantum entanglement between two targeted nodes with entanglement swapping protocol which require resource from both connections. As a quantum state has a finite decoherent time, it is crucial that a connection protocol is performed efficiently and within suitable time interval, so that two end-To-end matter qubits are entangled. We simulate a second generation network of quantum repeaters, one that is capable of quantum error correction, to estimate the waiting time needed to establish connection between distant nodes. Simulations are performed for a linear chain of nodes with unequal path lengths, and loss rates. We find that asymmetry of path lengths contributes to the waiting time of physical qubits. By simply adjusting the photon generation rate from one of its nodes, the waiting time is reduced while the time to complete quantum state tomography remains unaffected. This simple adjustment can play important roles in compensating for distance asymmetry when a quantum repeater is not stationary.
KW - Bell states analyzers
KW - quantum entanglement swapping
KW - quantum network
KW - quantum repeaters
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U2 - 10.1109/ICSEC53205.2021.9684634
DO - 10.1109/ICSEC53205.2021.9684634
M3 - Conference contribution
AN - SCOPUS:85125165648
T3 - ICSEC 2021 - 25th International Computer Science and Engineering Conference
SP - 179
EP - 184
BT - ICSEC 2021 - 25th International Computer Science and Engineering Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 25th International Computer Science and Engineering Conference, ICSEC 2021
Y2 - 18 November 2021 through 20 November 2021
ER -