Efficient transfer of entanglement along a qubit chain in the presence of thermal fluctuations

Das, Gourab; Bhattacharyya, Rangeet

Efficient transfer of entanglement along a qubit chain in the presence of thermal fluctuations

Gourab Das
(
- IISER, Kolkata
)
,
Rangeet Bhattacharyya
(
- IISER, Kolkata
)

Jan 27, 2022

13 pages

e-Print:

2201.11666 [quant-ph]

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Abstract: (arXiv)

Quantum communications require efficient implementations of quantum state transportation with high fidelity. Here, we consider the transport of entanglement along a chain of qubits. A series of SWAP operations involving successive pairs of qubits can transport entanglement along the chain. We report that the fidelity of the abovementioned gate has a maximum value corresponding to an optimum value of the drive amplitude in the presence of drive-induced decoherence. To incorporate environmental effect, we use a previously reported fluctuation-regulated quantum master equation [A. Chakrabarti and R. Bhattacharyya, Phys. Rev. A 97, 063837 (2018)]. The existence of an optimum drive amplitude implies that these series of SWAP operations on open quantum systems would have an optimal transfer speed of the entanglement.

Note:

Version 1, work in progress

fluctuation: quantum
thermal
entanglement
qubit: chain
decoherence
master equation

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