958 search results for “quantum field theory” in the Public website

Advances in computational methods for Quantum Field Theory calculations
In this work we describe three methods to improve the performance of Quantum Field Theory calculations.

Hydrodynamics and the quantum butterfly effect in Black Holes and large N quantum field theories
Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

Transport coefficients and low energy excitations of a strongly interacting holographic fluid
In this thesis, classes of strongly interacting quantum field theories, have been studied.

Deciphering fermionic matter: from holography to field theory
Promotor: K.E. Schalm, Copromotor: S.S. Lee

Jan Zaanen Group (Quantum Matter Theory)
The focus of our theoretical physics research is the nature of macroscopic matter that is in one or the other way still in the grip of quantum physics.

Cryptography from quantum uncertainty in the presence of quantum side information
Promotor: Ronald Cramer, Copromotor: Serge Fehr

Quantum Matter and Optics
Research groups in the Quantum Matter & Optics programme investigate electronic properties of matter and lightmatter interactions with emphasis on quantum information.

Algorithms for quantum software
Top scientists of three Dutch universities are working on software and systems for quantum computers. Researchers of the Leiden Institute of Advanced Computer Science (LIACS) and the Leiden Institute of Physics (LION) are developing new algorithms to make those super computers work. The coming years,…

Applied String Theory: Explaining Quantum Matter with Black Holes
Schalm

Cavity quantum electrodynamics with quantum dots in microcavities
Promotor: Prof.dr. D. Bouwmeester, Copromotor: M.P. van Exter

Methods to simulate fermions on quantum computers with hardware limitations
This thesis is a collection of theoretical works aiming at adjusting quantum algorithms to the hardware of quantum computers.

On periodically driven quantum systems
Promotor: C. W. J. Beenakker, Copromotor: J. K. Asboth

Quantum local asymptotic normality and other questions of quantum statistics
Promotor: R. Gill, Copromotor: P. Massart
 Quantum Optics
 Quantum Information

Mersenne primes and class field theory
Promotor: H.W. Lenstra, Jr., Copromotor: B. de Smit

Quantum Emitters
We study the dynamics of individual emitters in micro cavities.

Signatures of Majorana zeromodes in nanowires, quantum spin Hall edges, and quantum dots
Promotor: C.W.J. Beenakker, Copromotor: M.T. Wimmer

Quantum Matter and Optics
The quantum nature of matter and light has grown into a broad and fruitful research field for theorists and experimentalists alike. It combines foundational research with toward applications, the most well known of which is the quantum computer.

Applications of topology to Weyl semimetals and quantum computing
This thesis covers various applications of topology in condensed matter physics and quantum information.

Theorie van fermionpariteitomkeringen in supergeleiders
Majorana meets a mermaid

The quantum computer
The worldwide race to the quantum computer is in full swing. This computer can take on computing tasks that we can only dream of today, such as finding proteins that can be used as medicines in seconds flat. Leiden physicists have discovered how the Majorana particle can be used as a building block…

Dirk Bouwmeester Lab (Quantum Optics and Quantum Information)
The research program of the QO group has three leading themes: Optical Physics, Quantum Optics, and PhotonMatter Interactions. We work mostly at the boundaries between these themes with entanglement as a bridging and binding agent.

Quantum dot microcavity control of photon statistics
During my PhD research, I studied the photon statistics of light emitted by a microcavity that contains a single quantum dot (QD) on resonance.

Expansions of quantum group invariants
In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.

Quantum to Classical
In Quantum mechanics, particles can be in multiple positions simultaneously. Yet, when a measurement is made, the particle is found only in one place. Technology has come to a point where we may design experiments that will tell us how.

Thinking about the quantum internet
Quantum computers deserve their own quantum internet. This is a network that dispatches information not in the form of bits  ones and zeros  but rather as qubits, just like in the quantum computer itself. In the view of Dirk Bouwmeester, a professor in Leiden’s Quantum Matter & Optics research group,…

Quantum computation with Majorana zero modes in superconducting circuits
Promotor: C.W.J. Beenakker, CoPromotor: A.R. Akhmerov

Theory
Many important topics in computer science, such as the correctness of software, the efficiency of algorithms and the modeling of complicated systems, depend on sound theoretical underpinnings. In the Theory group, we study these fundamental building blocks and develop verification methods to prove system…

Theory
Many important topics in computer science, such as the correctness of software, the efficiency of algorithms and the modeling of complicated systems, depend on sound theoretical underpinnings. In the Theory group, we study these fundamental building blocks and develop verification methods to prove system…

Integer and fractional quantum hall effects in lattice magnets
Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink
 Jordi Tura Group (Applied Quantum Algorithms)

Julia Cramer Group (Quantum and Society Lab)
The research group ‘Quantum and Society’ explores the boundary between quantum technology and science communication.

Seeking the boundaries of quantum mechanics
Bouwmeester

Research in Physics, Classical/Quantum Information (MSc)
This master’s programme combines Physics with Data Science. You will learn how physics has its own tricks to deal with big data and how techniques from machine learning and deep learning can be applied to classical and quantum data. The first focus of attention is on classical data, including data mining,…

Michiel de Dood Lab (Quantum Detection)
Our group explores the larger domain of quantum measurement. In particular we investigate two themes that are closely connected: The detection of specially prepared quantum states of light and understanding and characterizing quantum photon detectors.

Postdoc and PHD candidate, Hybrid Quantum Algorithms
Science, Leiden Institute of Advanced Computer Science (LIACS)

Milan Allan Lab (Understanding Quantum Matter)
We are a dynamic research group at the Leiden Institute of Physics. Our aim is to explore and understand quantum materials, including strange metals, hightemperature superconductors, and quantum critical electron matter.

Livestream: Sean Carroll gives Ehrenfest Colloquium
On Wednesday September 26th, theoretical physicist Sean Carroll will give an Ehrenfest colloquium. It is part of a lecture series that has been running since 1912 and was founded by physicist Paul Ehrenfest.

Serge Fehr appointed as Professor Quantum information theory
As of 1 June, Serge Fehr has been appointed as Professor Quantum information theory at the Leiden Mathematical Institute (MI). Fehr is employed by Centrum Wiskunde & Informatica (CWI) and as of his appointment works one day a week at the MI. Fehr’s research is focused on quantum cryptology and will…

Research in Physics, Quantum Matter and Optics (MSc)
The master’s specialisation Research in Physics, Quantum Matter and Optics at Leiden University offers a thorough experience on the front line of physics research with a practical training of communicative and computer skills. The programme focuses on Condensed Matter problems, such as Molecular Electronics,…

Artifical intelligence gets a boost from quantum computing
Machine learning  on classical computers has made great progress in the past five years. Computer translation of speech and text is just one example. In Leiden, some researchers expect that machine learning, empowered by quantum systems, even if they only contain a few dozen qubits, can lead to a…

Quantum critical metals at vanishing fermion flavor number
Quantum critical metals at vanishing fermion flavor number.

Hydrodynamics and the quantum butterfly effect in Black Holes and large N quantum field theories
PhD Defence

Tjerk Oosterkamp Lab (Microscopy and Quantum Mechanics at milliKelvin temperatures)
We explore the possibilities to combine magnetic resonance techniques with atomic force microscopy together in a single microscope: the MRIAFM, also called Magnetic Resonance Force Microscopy (MRFM).

Effects of heavy fields on inflationary cosmology
Promotor: Prof.dr. A. Achucarro, CoPromotor: J.W. van Holten

Probing quantum materials with novel scanning tunneling microscopy techniques
This thesis described the development of novel scanning tunneling microscopy techniques to investigate strongly correlated electronic states in quantum matter.

Wolfgang Löffler Lab (Solid State and High Dimensional Quantum Optics)
Advancing the understanding of the interaction of light and matter on the singlequantum level is important for nearfuture quantum technologies but also to answer fundamental questions.

TwoProver BitCommitments: Classical, Quantum and NonSignaling
This thesis considers multiprover commitment schemes whose security is based on restrictions on the communication between the provers.

Cavity quantum electrodynamics with rareearth ions in solids
Promotor: Prof.dr. D. Bouwmeester, CoPromotor: M.J.A. de Dood