Quantum Communications & Networking
Quantum Communications & Networking
We work on architectures and protocols for quantum repeaters to distribute entanglement in a quantum network. This includes repeaters involving matter-based quantum memories and single photon or continuous-variable bosonic optical interfaces, as well as all-optical repeaters based on photonic or bosonic cluster states. We are interested in a full quantum network stack to provide end-to-end logical connectivity between arbitrary end nodes reliably and efficiently. Towards this we are exploring quantum switch, router and overall network architectures. For more details, check out the pictures below.
We work on architectures and protocols for quantum repeaters to distribute entanglement in a quantum network. This includes repeaters involving matter-based quantum memories and single photon or continuous-variable bosonic optical interfaces, as well as all-optical repeaters based on photonic or bosonic cluster states. We are interested in a full quantum network stack to provide end-to-end logical connectivity between arbitrary end nodes reliably and efficiently. Towards this we are exploring quantum switch, router and overall network architectures. For more details, check out the pictures below.
A continuous variable quantum repeater protocol based on quantum memories, two-mode squeezed light transmission and entanglement distillation based on noiseless linear amplification.
A continuous variable quantum repeater protocol based on quantum memories, two-mode squeezed light transmission and entanglement distillation based on noiseless linear amplification.
A repeater architecture based on Gottesman-Kitaev-Preskill encodeds bosonic qubits concatenated with qubit quantum error correcting codes.
A repeater architecture based on Gottesman-Kitaev-Preskill encodeds bosonic qubits concatenated with qubit quantum error correcting codes.
A continuous variable quantum switch catering to multiple bipartite entanglement flows.
A continuous variable quantum switch catering to multiple bipartite entanglement flows.
A trapped ion quantum repeater architecture and protocol.
A trapped ion quantum repeater architecture and protocol.
Photonic Quantum Information Processing
Photonic Quantum Information Processing
We work on different photonic quantum encodings and quantum logic. This includes single photon-based and bosonic encoded qubits such as cat qubits and Gottesman-Kitaev-Preskill encoded qubits. We are interested in fault tolerant measurement-based quantum computing using such qubits. In this regard, we recently developed a coherent error model for realistic, finite squeezed GKP qubit-based graph states. The model is also useful in analyzing GKP-qubit based quantum repeater schemes. We are currently exploring the use of photonic cat-basis logic to realize quantum-enhanced joint detection receivers in optical laser communications.
We work on different photonic quantum encodings and quantum logic. This includes single photon-based and bosonic encoded qubits such as cat qubits and Gottesman-Kitaev-Preskill encoded qubits. We are interested in fault tolerant measurement-based quantum computing using such qubits. In this regard, we recently developed a coherent error model for realistic, finite squeezed GKP qubit-based graph states. The model is also useful in analyzing GKP-qubit based quantum repeater schemes. We are currently exploring the use of photonic cat-basis logic to realize quantum-enhanced joint detection receivers in optical laser communications.
Finite squeeed GKP qubit quadrature wavefunctions.
Finite squeeed GKP qubit quadrature wavefunctions.
Generation of finite-squeezed GKP qubit-based graph states.
Schematic of a quantum-enhanced classical optical communication scheme based on binary phase shift keying and a quantum joint detection receiver.
If you are interested in joining our research efforts, please contact me at kausesh@pitt.edu.