Single shot i-Toffoli gate in dispersively coupled superconducting qubits

@article{Baker2021SingleSI,
  title={Single shot i-Toffoli gate in dispersively coupled superconducting qubits},
  author={Aneirin J. Baker and Gerhard Huber and Niklas J. Glaser and Federico Roy and I. Tsitsilin and Stefan Filipp and Michael J. Hartmann},
  journal={Applied Physics Letters},
  year={2021}
}
Aneirin J. Baker,1 Gerhard B. P. Huber,2, 3 Niklas J. Glaser,2, 3 Federico Roy,3, 4 Ivan Tsitsilin,2, 3 Stefan Filipp,2, 3, 5 and Michael J. Hartmann6 1SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom 2Department of Physics, Technical University of Munich, 85748 Garching, Germany 3Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany 4Theoretical Physics, Saarland University, 66123 Saarbrücken… 

Figures and Tables from this paper

Breaking the limits of purification: postselection enhances heat-bath algorithmic cooling

Quantum technologies require pure states, which are often generated by extreme refrigeration. Heat-bath algorithmic cooling is the theoretically optimal refrigeration technique: it shuttles entropy

An error-protected cross-resonance switch in weakly-tuneable architectures

In two-qubit gates activated by microwave pulses, by turning pulse on or off, the state of qubits are swapped between entangled or idle modes. In either mode, the presence of stray couplings makes

Extensive characterization of a family of efficient three-qubit gates at the coherence limit

While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in the presence of gate

Parasitic-free gate: A protected switch between idle and entangled states

We propose a gate to switch superconducting qubit pairs in and out of a two-body interaction. This gate uses cross resonance driving on a tunable circuit with adjusted parameters and without

Numerical analysis of effective models for flux-tunable transmon systems

Simulations and analytical calculations that aim to describe flux-tunable transmons are usually based on effective models of the corresponding lumped-element model. However, when a control pulse is

Quantum Error Correction Thresholds for the Universal Fibonacci Turaev-Viro Code

We consider a two-dimensional quantum memory of qubits on a torus which encode the extended Fibonacci string-net code, and devise strategies for error correction when those qubits are subjected to

References

SHOWING 1-10 OF 42 REFERENCES

Single-step implementation of high-fidelity n -bit Toffoli gates

The family of $n$-bit Toffoli gates, with the two-bit Toffoli gate as the figurehead, are of great interest in quantum information as they can be used as universal gates and in quantum error

High-fidelity iToffoli gate for fixed-frequency superconducting qubits

,

Realization of arbitrary doubly-controlled quantum phase gates

Developing quantum computers for real-world applications requires understanding theoretical sources of quantum advantage and applying those insights to design more powerful machines. Toward that end,

Strong Quantum Computational Advantage Using a Superconducting Quantum Processor.

This work develops a two-dimensional programmable superconducting quantum processor, Zuchongzhi, which is composed of 66 functional qubits in a tunable coupling architecture and establishes an unambiguous quantum computational advantage that is infeasible for classical computation in a reasonable amount of time.

Floating Tunable Coupler for Scalable Quantum Computing Architectures

We propose a floating tunable coupler that does not rely on direct qubit-qubit coupling capacitances to achieve the zero-coupling condition. We show that the polarity of the qubit-coupler couplings

Enabling multi-programming mechanism for quantum computing in the NISQ era

A multi-programming approach to execute multiple quantum circuits on quantum hardware simultaneously by introducing a parallelism manager to select an appropriate number of circuits to be executed at the same time and enhancing the mapping transition algorithm to make circuits executable on hardware using a decreased number of inserted gates.

Realization of High-Fidelity CZ and ZZ -Free iSWAP Gates with a Tunable Coupler

High-fidelity two-qubit gates at scale are a key requirement to realize the full promise of quantum computation and simulation. The advent and use of coupler elements to tunably control two-qubit

Integrated Tool Set for Control, Calibration, and Characterization of Quantum Devices Applied to Superconducting Qubits

A methodology to combine these tools to find a quantitatively accurate system model, high-fidelity gates and an approximate error budget, all based on a high-performance, feature-rich simulator are presented.

ZZ Freedom in Two-Qubit Gates

Achieving high fidelity two qubit gates requires elimination of unwanted interactions among qubits. Weakly anharmonic superconducting qubits in the absence of external driving exhibit an always-on

Tunable Coupler for Realizing a Controlled-Phase Gate with Dynamically Decoupled Regime in a Superconducting Circuit

Controllable interaction between superconducting qubits is desirable for large-scale quantum computation and simulation. Here, based on a theoretical proposal by Yan et al. [Phys. Rev. Appl. 10,