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pro vyhledávání: '"P Rouchon"'
We propose a simple method to estimate the parameters of a continuously measured quantum system, by fitting correlation functions of the measured signal. We demonstrate the approach in simulation, both on toy examples and on a recent superconducting
Externí odkaz:
http://arxiv.org/abs/2410.11955
Dissipative stabilization of cat qubits autonomously corrects for bit flip errors by ensuring that reservoir-engineered two-photon losses dominate over other mechanisms inducing phase flip errors. To describe the latter, we derive an effective master
Externí odkaz:
http://arxiv.org/abs/2410.00975
The problem of encoded quantum gate generation is studied in this paper. The idea is to consider a quantum system of higher dimension $n$ than the dimension $\bar n$ of the quantum gate to be synthesized. Given two orthonormal subsets $\mathbb{E} = \
Externí odkaz:
http://arxiv.org/abs/2409.01153
The so-called ``adiabatic elimination'' of fast decaying degrees of freedom in open quantum systems can be performed with a series expansion in the timescale separation. The associated computations are significantly more difficult when the remaining
Externí odkaz:
http://arxiv.org/abs/2404.01802
We present a monotonic numerical algorithm including time optimization for generating quantum gates for open systems. Such systems are assumed to be governed by Lindblad master equations for the density operators on a large Hilbert-space whereas the
Externí odkaz:
http://arxiv.org/abs/2403.20028
In this work, we consider the problem of online (real-time, single-shot) estimation of static or slow-varying parameters along quantum trajectories in quantum dynamical systems. Based on the measurement signal of a continuously-monitored quantum syst
Externí odkaz:
http://arxiv.org/abs/2403.04648
Autor:
Hutin, Hector, Essig, Antoine, Assouly, Réouven, Rouchon, Pierre, Bienfait, Audrey, Huard, Benjamin
The number of excitations in a large quantum system (harmonic oscillator or qudit) can be measured in a quantum non demolition manner using a dispersively coupled qubit. It typically requires a series of qubit pulses that encode various binary questi
Externí odkaz:
http://arxiv.org/abs/2402.05046
Publikováno v:
Ann. Henri Poincar\'e (2024)
We study a generic family of Lindblad master equations modeling bipartite open quantum systems, where one tries to stabilize a quantum system by carefully designing its interaction with another, dissipative, quantum system-a strategy known as quantum
Externí odkaz:
http://arxiv.org/abs/2311.10037
Autor:
Réglade, Ulysse, Bocquet, Adrien, Gautier, Ronan, Cohen, Joachim, Marquet, Antoine, Albertinale, Emanuele, Pankratova, Natalia, Hallén, Mattis, Rautschke, Felix, Sellem, Lev-Arcady, Rouchon, Pierre, Sarlette, Alain, Mirrahimi, Mazyar, Campagne-Ibarcq, Philippe, Lescanne, Raphaël, Jezouin, Sébastien, Leghtas, Zaki
Publikováno v:
Nature 629, 778-783 (2024)
Quantum bits (qubits) are prone to several types of errors due to uncontrolled interactions with their environment. Common strategies to correct these errors are based on architectures of qubits involving daunting hardware overheads. A hopeful path f
Externí odkaz:
http://arxiv.org/abs/2307.06617
Publikováno v:
IFAC PapersOnLine 56-2 (2023) 1325-1332
We analyze an experimentally accessible Lindblad master equation for a quantum harmonic oscillator. It approximately stabilizes finite-energy periodic grid states called Gottesman-Kitaev-Preskill (GKP) states, that can be used to encode and protect a
Externí odkaz:
http://arxiv.org/abs/2304.03806