382 citations · 1.1k across the 19 of their papers we have counts for
17 papers · 1 filter
Genuine Multipartite Entanglement between Logical Qubits via Cross-Code Lattice Surgery
Alex Steiner, Tomasz Andrzejewski, Phila Rembold +8
Universal quantum computers are expected to generate arbitrary complex quantum states of logical qubits encoded in many physical qubits. This capability hinges on a fault-tolerantl…
Characterizing physical and logical errors in a transversal CNOT via cycle error reconstruction
Nicholas Fazio, Robert Freund, Debankan Sannamoth +7
The development of prototype quantum information processors has progressed to a stage where small instances of logical qubit systems perform better than the best of their physical…
Solving an Industrially Relevant Quantum Chemistry Problem on Quantum Hardware
Ludwig Nützel, Alexander Gresch, Lukas Hehn +10
Quantum chemical calculations are among the most promising applications for quantum computing. Implementations of dedicated quantum algorithms on available quantum hardware were so…
Experimental measurement and a physical interpretation of quantum shadow enumerators
Daniel Miller, Kyano Levi, Lukas Postler +18
Throughout its history, the theory of quantum error correction has heavily benefited from translating classical concepts into the quantum setting. In particular, classical notions…
Learning symmetry-protected topological order from trapped-ion experiments
Nicolas Sadoune, Ivan Pogorelov, Claire L. Edmunds +6
Classical machine learning has proven remarkably useful in post-processing quantum data, yet typical learning algorithms often require prior training to be effective. In this work,…
Experimental fault-tolerant code switching
Ivan Pogorelov, Friederike Butt, Lukas Postler +4
Quantum error correction is a crucial tool for mitigating hardware errors in quantum computers by encoding logical information into multiple physical qubits. However, no single err…
Dynamical quantum maps for single-qubit gates under universal non-Markovian noise
J. M. Sánchez Velázquez, A. Steiner, R. Freund +4
Noise is both ubiquitous and generally deleterious in settings where precision is required. This is especially true in the quantum technology sector where system utility typically…
Demonstration of fault-tolerant Steane quantum error correction
Lukas Postler, Friederike Butt, Ivan Pogorelov +7
Encoding information redundantly using quantum error-correcting (QEC) codes allows one to overcome the inherent sensitivity to noise in quantum computers to ultimately achieve larg…
A self-referenced optical phase noise analyzer for quantum technologies
Robert Freund, Christian D. Marciniak, Thomas Monz
Second generation quantum technologies aim to outperform classical alternatives by utilizing engineered quantum systems. Maintaining the coherence required to enable any quantum ad…
Verifiable measurement-based quantum random sampling with trapped ions
Martin Ringbauer, Marcel Hinsche, Thomas Feldker +13
Quantum computers are now on the brink of outperforming their classical counterparts. One way to demonstrate the advantage of quantum computation is through quantum random sampling…
Strategies for practical advantage of fault-tolerant circuit design in noisy trapped-ion quantum computers
Sascha Heußen, Lukas Postler, Manuel Rispler +5
Fault-tolerant quantum error correction provides a strategy to protect information processed by a quantum computer against noise which would otherwise corrupt the data. A fault-tol…
Approaching optimal entangling collective measurements on quantum computing platforms
Lorcan O. Conlon, Tobias Vogl, Christian D. Marciniak +9
Entanglement is a fundamental feature of quantum mechanics and holds great promise for enhancing metrology and communications. Much of the focus of quantum metrology so far has bee…
Quantum portfolio value forecasting
Cristina Sanz-Fernandez, Rodrigo Hernandez, Christian D. Marciniak +5
We present an algorithm which efficiently estimates the intrinsic long-term value of a portfolio of assets on a quantum computer. The method relies on quantum amplitude estimation…
Demonstration of fault-tolerant universal quantum gate operations
Lukas Postler, Sascha Heußen, Ivan Pogorelov +10
Quantum computers can be protected from noise by encoding the logical quantum information redundantly into multiple qubits using error correcting codes. When manipulating the logic…
Optimal metrology with programmable quantum sensors
Christian D. Marciniak, Thomas Feldker, Ivan Pogorelov +7
Quantum sensors are an established technology that has created new opportunities for precision sensing across the breadth of science. Using entanglement for quantum-enhancement wil…
A compact ion-trap quantum computing demonstrator
Ivan Pogorelov, Thomas Feldker, Christian D. Marciniak +13
Quantum information processing is steadily progressing from a purely academic discipline towards applications throughout science and industry. Transitioning from lab-based, proof-o…
Towards fully commercial, UV-compatible fiber patch cords
Christian D. Marciniak, Harrison B. Ball, Alex T. -H. Hung +1
We present and analyze two pathways to produce commercial optical-fiber patch cords with stable long-term transmission in the ultraviolet (UV) at powers up to 200 mW, and ty…