A Method for Improving Quantum Repeater Rate
AssigneeThe University of Chicago
InventorsManish Singh, Supratik Guha
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Abstract
This disclosure is directed to a methods and systems for establishing a long-range quantum link in a quantum communication network and for improving connection rate of the quantum link. The quantum link is established across multiple quantum repeaters relying on quantum entanglement swap operations in the multiple quantum repeaters. The methods and systems use nested connection loops that are started as soon as quantum repeater resources become available. As such, another connection loop having a head start can be used to continue achieving the quantum link when one connection loop fails, thereby improving the connection rate for the quantum
Claims25
A method for quantum communication between a first quantum node and a second quantum node having a communication channel length, comprising:
- preparing a plurality of quantum repeater nodes forming a series of communication segments spanning from the first quantum node through the plurality of quantum repeater nodes to the second quantum node;
- initiating a first connection procedure comprising a first sequence of intermediate connection stages to establish a first direct quantum link between the first quantum node and the second quantum node via the plurality of quantum repeater nodes;
- and
- initiating, during one of the first sequence of intermediate connection stages, a second connection procedure comprising a second sequence of intermediate connection stages to establish a second direct quantum link between the first quantum node and the second quantum node via the plurality of the quantum repeater nodes.
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A method for quantum communication between a first quantum node and a second quantum node having a communication channel length, comprising:
- preparing a plurality of quantum repeater nodes forming a series of communication segments spanning from the first quantum node through the plurality of quantum repeater nodes to the second quantum node;
- selecting one or more triads of consecutive quantum repeaters separated by at least one other quantum repeater among the plurality of quantum repeater nodes;
- and
- initiating a connection procedure comprising a sequence of intermediate connection stages to establish a direct quantum link between the first quantum node and the second quantum node via the plurality of quantum repeater nodes by entangling quantum repeaters within each of the triads of consecutive quantum repeaters.
A quantum communication system, comprising:
- a first quantum node;
- a second quantum node;
- and
- a plurality of quantum repeater nodes forming a series of communication segments spanning from the first quantum node through the plurality of quantum repeater nodes to the second quantum node;
- wherein the first quantum node, the second quantum node, and the plurality of quantum repeater nodes are configured to:
- initiate a first connection procedure comprising a first sequence of intermediate connection stages to establish a first direct quantum link between the first quantum node and the second quantum nodes via the plurality of quantum repeater nodes;
- and
- initiate, during one of the first sequence of intermediate connection stages, a second connection procedure comprising a second sequence of intermediate connection stages to establish a second direct quantum link between the first quantum node and the second quantum node via the plurality of the quantum repeater nodes.
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Dependencies are inferred from the claim text.