A5043291826- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Neural Networks and Reservoir Computing
IQM (Finland)
2022-2024
Helsinki Institute of Physics
2008
Tunable coupling of superconducting qubits has been widely studied due to its importance for isolated gate operations in scalable quantum processor architectures. Here, we demonstrate a tunable qubit-qubit coupler based on floating transmon device, which allows us place at least 2 mm apart from each other while maintaining over 50-MHz between the and qubits. In introduced tunable-coupler design, both qubit-coupler couplings are mediated by two waveguides instead relying direct capacitive...
Abstract With a growing interest in quantum technology globally, there is an increasing need for accessing relevant physical systems education and research. In this paper we introduce commercially available on-site computer utilizing superconducting technology, offering insights into its fundamental hardware software components. We show how system can be used to teach concepts deepen understanding of theory computing. It offers learning opportunities future talent contributes technological...
We present and analyze a quantum key distribution protocol based on sending entangled $N$-qubit states instead of single-qubit ones as in the trail-blazing scheme by Bennett Brassard 1984 (BB84). Since qubits are sent acknowledged individually, an eavesdropper is limited to accessing them one one. In intercept-resend attack, this fundamental restriction allows make eavesdropper's information transmitted vanish if even not intercepted. The implied upper bound $1∕(2N)$ for further shown be...
With a growing interest in quantum technology globally, there is an increasing need for accessing relevant physical systems education and research. In this paper we introduce commercially available on-site computer utilizing superconducting technology, offering insights into its fundamental hardware software components. We show how system can be used to teach concepts deepen understanding of theory computing. It offers learning opportunities future talent contributes technological progress....
Quantum computing has tremendous potential to overcome some of the fundamental limitations present in classical information processing. Yet, today's technological quality and scaling prevent exploiting its full potential. based on superconducting quantum processing units (QPUs) is among most promising approaches towards practical advantage. In this article basic approach IQM Computers described covering both QPU rest full-stack computer. particular, focus a 20-qubit computer featuring Garnet...
The quantum key distribution protocol BB84, published by C. H. Bennett and G. Brassard in 1984, describes how two spatially separated parties can generate a random bit string fully known only to them transmission of single-qubit states. Any attempt eavesdrop on the introduces disturbance which be detected legitimate parties. In this Master's Thesis novel modification BB84 is analyzed. Instead sending single particles one-by-one as they are grouped non-local transformation applied each group...
Tunable coupling of superconducting qubits has been widely studied due to its importance for isolated gate operations in scalable quantum processor architectures. Here, we demonstrate a tunable qubit-qubit coupler based on floating transmon device which allows us place at least 2 mm apart from each other while maintaining over 50 MHz between the and qubits. In introduced tunable-coupler design, both qubit-coupler couplings are mediated by two waveguides instead relying direct capacitive...
Quantum key distribution (QKD) allows two spatially separated parties to securely generate a cryptographic key. The first QKD protocol, published by C. H. Bennett and G. Brassard in 1984 (BB84), describes how this is achieved transmitting individual qubits exchanging classical authenticated information. Any attempt eavesdrop on the protocol introduces errors detectable legitimate parties. This Licentiate Thesis studies recently introduced EEQKD which builds BB84. In EEQKD, sent individually...
Received 22 September 2008DOI:https://doi.org/10.1103/PhysRevA.78.039904©2008 American Physical Society
We present and analyze a quantum key distribution protocol based on sending entangled N-qubit states instead of single-qubit ones as in the trail-blazing scheme by Bennett Brassard (BB84). Since qubits are sent individually, an eavesdropper is limited to accessing them one one. In intercept-resend attack, this fundamental restriction allows make eavesdropper's information transmitted vanish if even not intercepted. The implied upper bound 1/(2N) for Eve's further shown be lowest since case N...