Strongly coupled quantum Otto cycle with single qubit bath

Strongly coupled quantum Otto cycle with single qubit bath

2022-07-18
Date: 2022-07-20
Time: 14:15
ICTQT Seminar
Speaker: Sagnik Chakraborty (Nicolaus Copernicus University, Torun) Abstract We discuss a model of a unitary evolution of two-qubits where the joint Hamiltonian is so chosen that one of the qubits acts as a bath and thermalizes the other qubit which is acting as the system. The corresponding master equation for the system, for a specific […]

Quantum Singular Value Transformation – A Unifying framework of quantum algorithms

2022-07-04
Date: 2022-07-06
Time: 16:00
Location: Team-Net Quantum Computing Colloquium
seminar
Speaker: András Gilyén (Alfréd Rényi Institute of Mathematics) Abstract An n-qubit quantum circuit performs a unitary operation on an exponentially large, 2^n-dimensional, Hilbert space, which is a major source of quantum speed-ups. We show how Quantum Singular Value Transformation can directly harness the advantages of exponential dimensionality by applying polynomial transformations to the singular values […]

Nonlocal games and operator algebras: solution spaces and robust self-testing in the quantum commuting model

2022-06-29
Date: 2022-06-29
Time: 15:15
Location: Quantum Information and Quantum Computing Working Group (CTP PAS)
seminar
Speaker: Alexander Frei (University of Copenhagen) Abstract We begin by recalling quantum strategies in the context of nonlocal games, and their description in terms of the state space on the full group algebra of certain free groups. With this description at hand, we then examine the quantum value and quantum strategies for the following prominent […]

Gaussian states, Kähler structures and an entanglement duality

2022-06-29
Date: 2022-07-06
Time: 14:15
Location: room 45, ICTQT
ICTQT Seminar
Speaker: Robert H. Jonsson (Wallenberg Initiative on Networks and Quantum Information, Nordita (Stockholm) Abstract Gaussian quantum states play a central role in many branches of physics - from quantum optics, to condensed matter and quantum field theory. In this talk, I aim to showcase the strength of the Kähler structure formalism for Gaussian states by […]

Gaussian states, Kähler structures and an entanglement duality

2022-06-29
Date: 2022-06-29
Time: 14:15
Location: room 45, ICTQT and https://zoom.us/j/7763535903?pwd=Q1VwQWhHME9GcjBJaUhEZWoxazhDdz09
ICTQT Seminar
Speaker: Robert H. Jonsson (Wallenberg Initiative on Networks and Quantum Information, Nordita (Stockholm)) Abstract Gaussian quantum states play a central role in many branches of physics – from quantum optics, to condensed matter and quantum field theory. In this talk, I aim to showcase the strength of the Kähler structure formalism for Gaussian states by […]

Spectral Metric and Einstein Functionals

2022-06-15
Date: 2022-06-17
Time: 12:15
Location: IFTIA Seminar (room 361)
seminar
Speaker: Andrzej Sitarz Abstract I'll review the concept of expressing the two basic notions of Riemannian geometry using spectral methods and Wodzicki residue over the algebra of pseudodifferential operators. This approach admits generalizations to the framework of noncommutative geometry. Based on joint work with L.Dabrowski and P.Zalecki.

Application of probabilistic quantum error correction for general noise

2022-06-09
Date: 2022-06-13
Time: 14:15
Location: Quantum Chaos and Quantum Information (Jagiellonian University)
seminar
Speaker: Ryszard Kukulski (IITiS PAN, Gliwice) Abstract Probabilistic quantum error correction (pQEC) is an error-correcting procedure which uses postselection to determine if the encoded information was successfully restored. In this talk, I will show an application of pQEC for various types of noise channels, e.g. Schur channels, channels with bounded Choi rank and random channels. […]

Algebraic Bethe Circuits

2022-06-09
Date: 2022-06-15
Time: 15:15
Location: Quantum Information and Quantum Computing Working Group (CTP PAS)
seminar
Speaker: Diego García-Martín (TII, Abu Dhabi, UAE) Abstract The Algebraic Bethe Ansatz (ABA) is a highly successful analytical method used to exactly solve several physical models in both statistical mechanics and condensed-matter physics. Here we bring the ABA to unitary form, for its direct implementation on a quantum computer. This is achieved by distilling the […]

Quantum software in 2022 : patterns and problems

2022-06-06
Date: 2022-06-10
Time: 12:00
Location: ICTQT seminar
ICTQT Seminar
Speaker: Ross Duncan (Cambridge Quantum) Abstract Quantum computers are based on the laws of quantum mechanics rather than Boolean logic; this implies very different algorithmic capabilities and, perhaps more surprisingly, very different issues across the board from software architecture to formal methods. In this talk I’ll give a broad overview of the current state of […]

A semidefinite programming hierarchy for the spectral quantum marginal problem

2022-06-01
Date: 2022-06-06
Time: 14:15
Location: Quantum Chaos and Quantum Information (Jagiellonian University)
seminar
Speaker: Felix Huber (Jagiellonian University) Abstract Jensen–Shannon divergence is an important distinguishability measure between probability distributions that finds interesting applications within the context of Information Theory. In particular, this classical divergence belongs to a remarkable class of divergences known as Csiszár or f -divergences. In this talk I analyze the problem of obtaining a distance […]
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