Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Poster III

Q 37.38: Poster

Wednesday, March 13, 2024, 17:00–19:00, Tent B

Optical Protocol for Generating Squeezed Coherent State Superpositions — •Elnaz Bazzazi, Roger Alfredo Kögler, Leon Reichgardt, and Oliver Benson — Department of Physics, Humboldt University Berlin, Berlin, Germany

Non-Gaussian states play a crucial role in fault-tolerant quantum computing, where the manipulation of quantum states is susceptible to errors [1]. Certain classes of non-Gaussian states, notably coherent state superpositions known as cat states, pose challenges in generation due to complexity of breeding protocols and limitations in their output state [2,3]. In this study, we explore an extension of the protocol proposed in ref [4] that makes use of squeezed states and photon number-resolving detectors as resources, demonstrating potential in generating high-amplitude squeezed cat states. Simulation results validate the efficacy of this protocol, and we suggest an experimental setup for its practical realization. This research contributes to advances in fault-tolerant quantum information processing through the generation of non-Gaussian states.

[1] Phys. Rev. A 106, 022431 (2022).

[2] Phys. Rev. A 103, 013710 (2021).

[3] Opt. Express 31, 12865-12879 (2023).

[4] Phys. Scr. 97 115002 (2022).

Keywords: Coherent State Superposition; Squeezed state; Homodyne Detection; Strawberry Fields