1769 search results for “quantum mechanics” in the Public website

Seeking the boundaries of quantum mechanics
Bouwmeester

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.

Quantum Mechanics Course for Physics teachers
Leiden University organizes a course on quantum mechanics for high school Physics teachers. As the curriculum gains a new quantum component, the university enables teachers to give the best possible guidance to their students.

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

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.

The hunt for the quantum collapse
The most famous cat in science is Schrödinger's cat, the quantum mechanical mammal, which can exist in a superposition, a state that is alive as well as dead. The moment you look at it, one of both options is chosen. Leiden University physicists simulated an experiment to catch this mysterious moment…

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.

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.

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

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.

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,…

Upper Limit Found for Quantum World
The small quantum world and our world of perception obey different laws of nature. Leiden physicists search for the border between both worlds. In an article published soon in Physical Review Letters they set an upper limit.

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

Breakthrough in uncrackable quantum encryption
An important discovery makes it possible to communicate complex information among multiple people without the message being cracked. The communication can also relate to complex information.

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,…

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

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

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

Quantum dynamics of dissociative chemisorption of CH4 on metal surfaces
The dissociation of CH4 into CH3 + H on a metal surface is the rate determining step in processes which produce hydrogen, such as steam reforming and catalytic partial oxidation. Ultimately, we want to study the dissociation of methane on Ni(111) and Pt(111) quantum mechanically while taking into account…

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?

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

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…

Search for mechanisms to control massless electrons in graphene
Beenakker

Where photons meet phonons
We investigate how radiation pressure can be used to influence the mechanical motion of a micromirror suspended from springs.

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.

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 dynamics of dissociative chemisorption of hydrogen and other diatomic molecules on metal surfaces
It is possible to treat the dynamics of the dissociation of hydrogen on metal surfaces quantum mechanically, while taking into account the motion in all six molecular degrees of freedom without making approximations. Because the approximations of neglecting surface phonons and electronhole pair excitation…

Integer and fractional quantum hall effects in lattice magnets
Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink

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

Strategies for Mechanical Metamaterial Design
On a structural level, the properties featured by a majority of mechanical metamaterials can be ascribed to the finite number of soft internal degreesof freedom allowing for lowenergy deformations.
 Jordi Tura Group (Applied Quantum Algorithms)

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

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,…
 Quantum Optics
 Quantum Information

Cheianov Group (Quantum Many Body Physics in Condensed Matter and Ultracold Atomic Systems)
The research in my group addresses a range of topics related to quantum manybody physics.

Smoothly breaking unitarity : studying spontaneous collapse using two entangled, tuneable, coherent amplifiers
The Copenhagen interpretation of quantum mechanics states that a measurement collapses a wavefunction onto an eigenstate of the corresponding measurement operator.

NWO Projectruimte for physicists Schalm and Zaanen
NWO has awarded a €392k Projectruimte grant to physicists Koenraad Schalm and Jan Zaanen to study ‘strange metals’. These materials are alleged to follow the bizarre laws of quantum mechanics even at everyday length scales.

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…

Where does the quantum world end?
With his icecold nano force sensor, Tjerk Oosterkamp searches for the boundary between the quantum world and the everyday world. The Leiden physicist has received an NWO subsidy of 600,000 euros.

Applied String Theory: Explaining Quantum Matter with Black Holes
Schalm

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

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.

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.

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.

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

Anisotropy in cell mechanics
Mechanical interactions between cells and their environment play an important role in many biological processes.