27 citations · 83 across the 13 of their papers we have counts for
13 papers · 1 filter
High-Fidelity Entangled States in a Connectivity-Four Fluxonium Quantum Processor
J. Schirk, N. Bruckmoser, S. M. Taubenberger +10
A central challenge in fluxonium-based quantum processors is the extension of the qubit connectivity to two-dimensional lattices compatible with quantum code-error correction. Here…
A high-fidelity two-qubit gate for multimode superconducting P-mon qubits
Frederik Pfeiffer, Federico A. Roy, Niklas J. Glaser +11
To scale superconducting quantum processors, it is essential to achieve long coherence times while engineering interactions that do not introduce additional decoherence channels. I…
Dynamical Decoupling using Universal Optimal Tracking
Amit Devra, Emanuel Malvetti, Niklas J. Glaser +8
Dynamical decoupling (DD) is a widely used and resource-efficient technique for error suppression, but conventional DD relies on periodically repeating a short pulse block to refoc…
Scalable Single-Step Generation of W States in 2D Superconducting Qubit Lattices
João H. Romeiro, Federico A. Roy, Niklas Bruckmoser +13
The reliable generation of multi-qubit entanglement is a prerequisite for large-scale quantum information technologies. In particular, W states are a valuable resource owing to the…
Superconducting Qubit Gates Robust to Parameter Fluctuations
Emily Wright, Leo Van Damme, Niklas J. Glaser +14
State-of-the-art single-qubit gates on superconducting transmon qubits can achieve the fidelities required for error-corrected computations. However, parameter fluctuations due to…
Sensitivity-Adapted Closed-Loop Optimization for High-Fidelity Controlled-Z Gates in Superconducting Qubits
Niklas J. Glaser, Federico A. Roy, Ivan Tsitsilin +13
Achieving fast and high-fidelity qubit operations is crucial for unlocking the potential of quantum computers. In particular, reaching low gate errors in two-qubit gates has been a…
Sub-Harmonic Control of a Fluxonium Qubit via a Purcell-Protected Flux Line
Johannes Schirk, Florian Wallner, Longxiang Huang +21
Protecting qubits from environmental noise while maintaining strong coupling for fast high-fidelity control is a central challenge for quantum information processing. Here, we demo…
Parity-dependent state transfer for direct entanglement generation
Federico A. Roy, João H. Romeiro, Leon Koch +19
As quantum information technologies advance, challenges in scaling and connectivity persist, particularly the need for long-range qubit connectivity and efficient entanglement gene…
Parametric multi-element coupling architecture for coherent and dissipative control of superconducting qubits
G. B. P. Huber, F. A. Roy, L. Koch +20
As systems for quantum computing keep growing in size and number of qubits, challenges in scaling the control capabilities are becoming increasingly relevant. Efficient schemes to…
Efficient decoupling of a non-linear qubit mode from its environment
Frederik Pfeiffer, Max Werninghaus, Christian Schweizer +21
To control and measure the state of a quantum system it must necessarily be coupled to external degrees of freedom. This inevitably leads to spontaneous emission via the Purcell ef…
Wigner State and Process Tomography on Near-Term Quantum Devices
Amit Devra, Niklas J. Glaser, Dennis Huber +1
We present an experimental scanning-based tomography approach for near-term quantum devices. The underlying method has previously been introduced in an ensemble-based NMR setting.…
Controlled-Controlled-Phase Gates for Superconducting Qubits Mediated by a Shared Tunable Coupler
Niklas J. Glaser, Federico Roy, Stefan Filipp
Applications for noisy intermediate-scale quantum computing devices rely on the efficient entanglement of many qubits to reach a potential quantum advantage. Although entanglement…
Single Shot i-Toffoli Gate in Dispersively Coupled Superconducting Qubits
Aneirin J. Baker, Gerhard B. P. Huber, Niklas J. Glaser +4
Quantum algorithms often benefit from the ability to execute multi-qubit (>2) gates. To date such multi-qubit gates are typically decomposed into single- and two-qubit gates, parti…