Environment-Assisted Generation of Non-Gaussian Wave-Packet Quantum States

Area of Science:

• Quantum Computing
• Quantum Optics
• Superconducting Circuits

Background:

• Generating non-Gaussian quantum states is essential for quantum computing.
• Converting these states into traveling wave packets is a significant challenge.
• Scalable and fault-tolerant quantum computing requires efficient methods for state generation and manipulation.

Purpose of the Study:

• To present a hardware-efficient approach for simultaneously generating non-Gaussian states and converting them into traveling wave packets.
• To enable the creation of a wide range of non-Gaussian, error-correctable quantum states.
• To identify suitable experimental platforms and parameter regimes for the proposed method.

Main Methods:

• Combining engineered nonlinear dissipation with linear transmission loss from a superconducting circuit to a waveguide.
• Leveraging low-order interactions within dissipative channels to induce high-order nonlinearity.
• Utilizing superconducting circuits and waveguides for quantum state manipulation.

Main Results:

• Deterministic emission of various non-Gaussian states, including Schrödinger cat states, Gottesman-Kitaev-Preskill states, and pair-cat states.
• Successful simultaneous generation of non-Gaussian states and their conversion into traveling wave packets.
• Identification of specific superconducting-circuit platforms and realistic parameter regimes for experimental implementation.

Conclusions:

• The proposed method offers a hardware-efficient solution for generating non-Gaussian states and traveling wave packets.
• This approach is crucial for advancing scalable, fault-tolerant quantum computing.
• The identified experimental platforms and parameters pave the way for practical implementation.