QuGIT: A numerical toolbox for Gaussian quantum states

Article Quantum Science & Technology

Quadratic Speed-Up for Simulating Gaussian Boson Sampling

Nicolas Quesada et al.

Summary: We introduce an algorithm for classical simulation of Gaussian boson sampling that is twice as fast as previously known methods. The complexity of the algorithm is exponential in the number of detected photon pairs and directly proportional to the time required to calculate a probability amplitude for a pure Gaussian state. The main innovation is the use of auxiliary conditioning variables to reduce the problem of sampling to the computation of pure-state probability amplitudes.

PRX QUANTUM (2022)

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Article Multidisciplinary Sciences

Strong optomechanical coupling at room temperature by coherent scattering

Andres de los Rios Sommer et al.

Summary: This study demonstrates strong coupling regime at room temperature between a levitated silica particle and a high finesse optical cavity. The coupling strength achieved is close to three times the cavity linewidth, deep into the strong coupling regime.Entering the strong coupling regime is an essential step towards quantum control with mesoscopic objects at room temperature.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Real-time optimal quantum control of mechanical motion at room temperature

Lorenzo Magrini et al.

Summary: Optimal quantum control of an optically trapped nanoparticle in its ground state is demonstrated at room temperature, using Kalman filtering to track its quantum trajectory in real time.

NATURE (2021)

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Article Quantum Science & Technology