Search Results for author: Shahnawaz Ahmed

Found 7 papers, 5 papers with code

Gradient-descent quantum process tomography by learning Kraus operators

no code implementations1 Aug 2022 Shahnawaz Ahmed, Fernando Quijandría, Anton Frisk Kockum

The GD-QPT matches the performance of both compressed-sensing (CS) and projected least-squares (PLS) QPT in benchmarks with two-qubit random processes, but shines by combining the best features of these two methods.

Classification and reconstruction of optical quantum states with deep neural networks

1 code implementation3 Dec 2020 Shahnawaz Ahmed, Carlos Sánchez Muñoz, Franco Nori, Anton Frisk Kockum

For pure states with additive or convolutional Gaussian noise, the QST-CGAN is able to adapt to the noise and reconstruct the underlying state.

General Classification Quantum State Tomography

Quantum State Tomography with Conditional Generative Adversarial Networks

1 code implementation7 Aug 2020 Shahnawaz Ahmed, Carlos Sánchez Muñoz, Franco Nori, Anton Frisk Kockum

We augment a CGAN with custom neural-network layers that enable conversion of output from any standard neural network into a physical density matrix.

Quantum State Tomography

Virtual excitations in the ultra-strongly-coupled spin-boson model: physical results from unphysical modes

1 code implementation14 Mar 2019 Neill Lambert, Shahnawaz Ahmed, Mauro Cirio, Franco Nori

Here we show how, in the ultra-strongly-coupled spin-boson model, apparently unphysical "Matsubara modes" are required not only to regulate detailed balance, but also to arrive at a correct and physical description of the non-perturbative dynamics and steady-state.

Quantum Physics

Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance

1 code implementation14 May 2018 Nathan Shammah, Shahnawaz Ahmed, Neill Lambert, Simone De Liberato, Franco Nori

Assessing the robustness of collective effects against local dissipation is paramount to predict their presence in different physical implementations.

Quantum Physics

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