Circuit QED: single-step realization of a multiqubit controlled phase gate with one microwave photonic qubit simultaneously controlling $n-1$ microwave photonic qubits

Abstract

We present a novel method to realize a multi-target-qubit controlled phase gate with one microwave photonic qubit simultaneously controlling $n-1$ target microwave photonic qubits. This gate is implemented with $n$ microwave cavities coupled to a superconducting flux qutrit. Each cavity hosts a microwave photonic qubit, whose two logic states are represented by the vacuum state and the single photon state of a single cavity mode, respectively. During the gate operation, the qutrit remains in the ground state and thus decoherence from the qutrit is greatly suppressed. This proposal requires only a single-step operation and thus the gate implementation is quite simple. The gate operation time is independent of the number of the qubits. In addition, this proposal does not need applying classical pulse or any measurement. Numerical simulations demonstrate that high-fidelity realization of a controlled phase gate with one microwave photonic qubit simultaneously controlling two target microwave photonic qubits is feasible with current circuit QED technology. The proposal is quite general and can be applied to implement the proposed gate in a wide range of physical systems, such as multiple microwave or optical cavities coupled to a natural or artificial $\Lambda$-type three-level atom.

22 pages, 7 figures. arXiv admin note: text overlap with arXiv:1706.07083, arXiv:1910.08240

References in corpus (16)

• Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
• Microwave photonics with superconducting quantum circuits
• Superconducting Circuits and Quantum Information
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Effective Hamiltonian Theory and Its Applications in Quantum Information
• Realization of the quantum Toffoli gate with trapped ions
• Possible realization of entanglement, logical gates and quantum information transfer with superconducting-quantum-interference-device qubits in cavity QED
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit
• Deterministic entanglement of photons in two superconducting microwave resonators
• Fast universal quantum gates on microwave photons with all-resonance operations in circuit QED
• Single-step implementation of a multiple-target-qubit controlled phase gate without need of classical pulses
• Universal controlled-phase gate with cat-state qubits in circuit QED
• Robust quantum state transfer using tunable couplers
• Universal measurement-based quantum computation in two-dimensional SPT phases

Cited by in corpus (2)

• One-step implementation of a multi-target-qubit controlled-phase gate with photonic qubits encoded via eigenstates of the photon-number parity operator
• Dynamics and multiqubit entanglement in distant resonators