Engineering and tomography of collective quantum state in gases

Engineering and tomography of collective quantum state in gases

2022-10-26
Date: 2022-10-24
Time: 14:15
Location: Quantum Chaos and Quantum Information (Jagiellonian University)
seminar
Speaker: Szymon Pustelny (Institute of Theoretical Physics, JU) Abstract The ability to generate, modify, and retrieve a quantum state is of paramount importance for quantum information. Conventional physical implementations of the schemes, enabling realization of the tasks, employ single microscopic objects (atoms, photons, superconducting circuits, etc.). However, operation with such objects presents many experimental challenges. […]

Reconstructing the whole from its parts

2022-10-26
Date: 2022-10-31
Time: 14:15
Location: Quantum Chaos and Quantum Information (Jagiellonian University)
ICTQT Seminar
Speaker: Dardo Goyeneche (Universidad de Antofagasta, Chile) Abstract The quantum marginal problem consists in deciding whether a given set of marginal reductions is compatible with the existence of a global quantum state or not. In this talk, we formulate the problem from the perspective of dynamical systems theory and study its advantages with respect to the […]

Reconstructing the whole from its parts

2022-10-26
Date: 2022-10-26
Time: 14:00
Location: ICTQT
seminar
Speaker: Dardo Goyeneche (Universidad de Antofagasta, Chile) Abstract The quantum marginal problem consists in deciding whether a given set of marginal reductions is compatible with the existence of a global quantum state or not. In this talk, we formulate the problem from the perspective of dynamical systems theory and study its advantages with respect to […]

Certification of entangled quantum states and quantum measurements in Hilbert spaces of arbitrary dimension

2022-10-10
Date: 2022-10-12
Time: 12:30
Location: Center for Theoretical Physics Colloquium
seminar
Speaker: Shubhayan Sarkar (CTP, PAS) Abstract A lot of work has recently been put into finding device-independent certification schemes for composite quantum systems. Most of them are however restricted to lower-dimensional systems, in particular two-qubit states. In this talk, I will first explain the basics of device-independent certification of quantum systems. Then, I will present […]

An optimal LCU-based quantum linear system solver

2022-10-10
Date: 2022-10-12
Time: 16:00
Location: Team-Net Quantum Computing Colloquium
seminar
Speaker: Sander Gribling (Université de Paris) Abstract In this talk, I will first give an overview of recent techniques such as taking linear combinations of unitaries (LCU) and the quantum singular value transformation framework (QSVT). These techniques allow one to reduce many quantum algorithmic problems to questions about finding good / the best polynomial approximations […]

Asymptotics and typicality of sequential generalized measurements

2022-09-26
Date: 2022-09-28
Time: 15:15
Location: Quantum Information and Quantum Computing Working Group (CTP PAS)
seminar
Speaker: Wen-Long Ma (Institute of Semiconductors, Chinese Academy of Sciences) Abstract The relation between projective measurements and generalized quantum measurements is a fundamental problem in quantum physics, and clarifying this issue is also important to quantum technologies. While it has been intuitively known that projective measurements can be constructed from sequential generalized or weak measurements, […]

Distinguishability-induced many-body decoherence

2022-09-26
Date: 2022-09-28
Time: 12:00
Location: ICTQT room 317
ICTQT Seminar
Speaker: Christoph Dittel (University of Freiburg) Abstract Indistinguishability is the essential ingredient for many-body interference — a purely quantum mechanical interference effect between many identical bosonic or fermionic particles that can be exploited for a variety of applications, ranging from simulations with ultracold atoms to photonic quantum information processing. In this talk I give an […]

Designing of quantum thermal machines

2022-09-23
Date: 2022-09-23
Time: 12:00
Location: room 317, ICTQT
ICTQT Seminar
Speaker: Srijon Ghosh Abstract The quest for small quantum thermal machines that can supersede their classical counterparts in performance has been an important and vibrant component in the field of quantum thermodynamics. These machines are expected to not only provide a better understanding of the interplay between the concepts from quantum information theory and thermodynamics, […]

What is nonclassical about uncertainty relations?

2022-08-02
Date: 2022-08-03
Time: 14:15
Location: room 45, ICTQT
ICTQT Seminar
Speaker: Lorenzo Catani (TU Berlin) Abstract Uncertainty relations express limits on the extent to which the outcomes of distinct measurements on a single state can be made jointly predictable. The existence of nontrivial uncertainty relations in quantum theory is generally considered to be a way in which it entails a departure from the classical worldview. […]
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