Search Results for author: Nicolas Brunner

Found 8 papers, 3 papers with code

Thermodynamic Computing via Autonomous Quantum Thermal Machines

no code implementations30 Aug 2023 Patryk Lipka-Bartosik, Martí Perarnau-Llobet, Nicolas Brunner

Such a machine, which we term a "thermodynamic neuron", can implement any linearly-separable function, and we discuss explicitly the cases of NOT, 3-majority and NOR gates.

Building separable approximations for quantum states via neural networks

1 code implementation15 Dec 2021 Antoine Girardin, Nicolas Brunner, Tamás Kriváchy

Finding the closest separable state to a given target state is a notoriously difficult task, even more difficult than deciding whether a state is entangled or separable.

Signatures of Liouvillian exceptional points in a quantum thermal machine

no code implementations27 Jan 2021 Shishir Khandelwal, Nicolas Brunner, Géraldine Haack

Viewing a quantum thermal machine as a non-Hermitian quantum system, we characterize in full generality its analytical time-dependent dynamics by deriving the spectrum of its non-Hermitian Liouvillian for an arbitrary initial state.

Quantum Physics Mesoscale and Nanoscale Physics Mathematical Physics Mathematical Physics

Fast semidefinite programming with feedforward neural networks

no code implementations11 Nov 2020 Tamás Kriváchy, Yu Cai, Joseph Bowles, Daniel Cavalcanti, Nicolas Brunner

Given the optimization constraints as an input, a neural network outputs values for the optimization parameters such that the constraints are satisfied, both for the primal and the dual formulations of the task.

Hybrid Thermal Machines: Generalized Thermodynamic Resources for Multitasking

no code implementations8 Sep 2020 Gonzalo Manzano, Rafael Sánchez, Ralph Silva, Géraldine Haack, Jonatan B. Brask, Nicolas Brunner, Patrick P. Potts

Thermal machines perform useful tasks--such as producing work, cooling, or heating--by exchanging energy, and possibly additional conserved quantities such as particles, with reservoirs.

Quantum Physics Statistical Mechanics

A neural network oracle for quantum nonlocality problems in networks

1 code implementation24 Jul 2019 Tamás Kriváchy, Yu Cai, Daniel Cavalcanti, Arash Tavakoli, Nicolas Gisin, Nicolas Brunner

As such, the neural network acts as an oracle, demonstrating that a behavior is classical if it can be learned.

Causal Inference

Bell nonlocality

1 code implementation12 Mar 2013 Nicolas Brunner, Daniel Cavalcanti, Stefano Pironio, Valerio Scarani, Stephanie Wehner

In the last two decades, Bell's theorem has been a central theme of research from a variety of perspectives, mainly motivated by quantum information science, where the nonlocality of quantum theory underpins many of the advantages afforded by a quantum processing of information.

Quantum Physics

Secrecy extraction from no-signalling correlations

no code implementations23 Jun 2006 Valerio Scarani, Nicolas Gisin, Nicolas Brunner, Lluis Masanes, Sergi Pino, Antonio Acin

The usual security proofs suppose that the authorized partners, Alice and Bob, have a perfect knowledge and control of their quantum systems and devices; for instance, they must be sure that the logical bits have been encoded in true qubits, and not in higher-dimensional systems.

Quantum Physics

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