Concept
Codage superdense
Publications associées (41)
Quantum Protocols for ML, Physics, and Finance
In this thesis, we give new protocols that offer a quantum advantage for problems in ML, Physics, and Finance.Quantum mechanics gives predictions that are inconsistent with local realism.The experiment proving this fact (Bell, 1964) gives a quantum protoco ...
EPFL2024Emergence of highly coherent two-level systems in a noisy and dense quantum network
Sandrine Gerber, Gabriel Aeppli
Quantum sensors and qubits are usually two-level systems (TLS), the quantum analogues of classical bits assuming binary values 0 or 1. They are useful to the extent to which superpositions of 0 and 1 persist despite a noisy environment. The standard prescr ...
Berlin2024Electron-beam based nanoscale quantum controls
Advancing quantum technologies depends on the precise control of individual quantum systems, the so-called qubits, and the exploitation of their quantum properties. Nowadays, expanding the number of qubits to be entangled is at the core of the developments ...
EPFL2024Erbium and thulium on MgO(100)/Ag(100) as candidates for single atom qubits
Harald Brune, François Patthey, Stefano Rusponi, Marina Pivetta, Edgar Fernandes, Fabio Donati, Aparajita Singha
Lanthanide atoms on surfaces are an exceptional platform for atomic-scale magnetic information storage. However, their potential as qubits remains unexplored due to the limited number of experimental setups that can coherently drive the spins of single ada ...
AMER PHYSICAL SOC2023Programmable frequency-bin quantum states in a nano-engineered silicon device
Frequency-bin qubits get the best of time-bin and dual-rail encodings, but require external modulators and pulse shapers to build arbitrary states. Here, instead, the authors work directly on-chip by controlling the interference of biphoton amplitudes gene ...
NATURE PORTFOLIO2023Mitigation of frequency collisions in superconducting quantum processors
The reproducibility of qubit parameters is a challenge for scaling up superconducting quantum processors. Signal cross talk imposes constraints on the frequency separation between neighboring qubits. The frequency uncertainty of transmon qubits arising fro ...
College Pk2023Cavity-mediated electron-photon pairs
Tobias Kippenberg, Rui Ning Wang, Guanhao Huang, Zheru Qiu, Yujia Yang, Junqiu Liu, Arslan Sajid Raja
Quantum information, communication, and sensing rely on the generation and control of quantum correlations in complementary degrees of freedom. Free electrons coupled to photonics promise novel hybrid quantum technologies, although single-particle correlat ...
AMER ASSOC ADVANCEMENT SCIENCE2022Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots
Spin qubits in silicon and germanium quantum dots are promising platforms for quantum computing, but entangling spin qubits over micrometer distances remains a critical challenge. Current prototypical architectures maximize transversal interactions between ...
AMER PHYSICAL SOC2022Secret Key Generation Using Short Blocklength Polar Coding Over Wireless Channels
This paper investigates the problem of secret key generation from correlated Gaussian random variables in the short blocklength regime. Short blocklengths are commonly employed in massively connected IoT sensor networks in 5G and beyond wireless systems. P ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Sparsely Observed Functional Time Series: Theory and Applications
Functional time series is a temporally ordered sequence of not necessarily independent random curves. While the statistical analysis of such data has been traditionally carried out under the assumption of completely observed functional data, it may well ha ...
EPFL2021