# Past Quantum Lunches

### QLunch: Raghavendra Selvan

**Speaker:**Raghavendra Selvan, Department of Computer Science, University of Copenhagen

### QLunch: Pawel Mazurek

**Speaker:**Pawel Mazurek, University of Gdansk

### QLunch: Jingxuan Zhang

**Speaker:**Jingxuan Zhang from GeoTop

### QLunch: Oswin Krause

**Speaker:**Oswin Krause, DIKU.

### QLunch: Ion Nechita

**Speaker:**Ion Nechita

### QLunch: Jan Derezinski

**Speaker:**Jan Derezinski

### QLunch: Lukas Schimmer

**Speaker:**Lukas Schimmer, The Royal Swedish Academy of Sciences

### QLunch: Ben Brown

**Speaker:**Ben Brown

### QLunch: Thor Gabelgaard Nielsen

**Speaker:**Thor Gabelgaard Nielsen

### QLunch: Horia Cornean

**Speaker:**Horia Cornean, Aalborg University

### QLunch: Jurij Volcic

**Speaker:**Jurij Volcic from QMATH

### QLunch: Harry Buhrman

**Speaker:**Harry Buhrman from QuSoft

### QLunch: Ruben Niederhagen

**Speaker:**Ruben Niederhagen, University of Southern Denmark

### ON-LINE and on-campus QLunch: Sungsoo Byun

**Speaker:**Sungsoo Byun, Korea Institute for Advanced Study (KIAS).

### QLunch: Robin Reuvers

**Speaker:**Robin Reuvers

### ON-LINE QLunch: Emilio Onorati and Tamara Kohler

**Speakers:**Emilio Onorati and Tamara Kohler

### QMATH Seminar: Enno Lenzmann

**Speaker:**Enno Lenzmann, University of Basel

### ON-LINE QLunch: Daniel Malz

**Speaker:**Daniel Malz, the Max-Planck-Institute for Quantum Optics

### ON-LINE QLunch: Enrique Cervero Martin

**Speaker:**Enrique Cervero Martin

### ON-LINE QLunch: Gianni Scarpa

**Speaker:**Gianni Scarpa, UPM Madrid

### ON-LINE QLunch: Martina Niggli

**Speaker:**Martina Niggli, ETH Zürich

### ON-LINE QLunch: Andreas Bluhm

**Speaker:**Andreas Bluhm from QMATH

### ON-LINE QLunch: David Roberson

**Speaker:**David Roberson, DTU Compute

### ON-LINE QLunch: Ralf Müller

**Speaker:**Ralf Müller, Friedrich-Alexander-Universität Erlangen-Nürnberg

### ON-LINE QLunch: Mizanur Rahaman

**Speaker**: Mizanur Rahaman

### ON-LINE QLunch: Giorgio Cipolloni

**Speaker:**Giorgio Cipolloni

### ON-LINE QLunch: Radu Curticapean

**Speaker:**Radu Curticapean

### ON-LINE QLunch: Ta Duy-Hoang

**Speaker:**Ta Duy-Hoang, ENS de Lyon

### ON-LINE QLunch: Daniel Stilck França

**Speaker:**Daniel Stilck França from QMATH

### ON-LINE QLunch: Margherita Disertori

**Speaker:**Margherita Disertori, University of Bonn

### ON-LINE QLunch: Michal Horodecki

**Speaker:**Michal Horodecki, University of Gdansk

### ON-LINE QLunch: Roger Colbeck

**Speaker:**Roger Colbeck from the University of York

### ON-LINE QLunch: Asbjørn Bækgaard Lauritsen

**Speaker:**Asbjørn Bækgaard Lauritsen, IST Austria

### ON-LINE QLunch: Christoph Hirche

**Speaker:**Christoph Hirche from QMATH

### ON-LINE QLunch: Christiaan van de Ven

**Speaker:**Christiaan van de Ven, University of Trento

### ON-LINE QLunch: Michael Vogelius

**Speaker:**Michael Vogelius from Rutgers University

### ON-LINE QLunch: Nilin Abrahamsen

**Speaker:**Nilin Abrahamsen from MIT

### ON-LINE QLunch: Johannes Meyer

**Speaker:**Johannes Meyer, Freie Universität Berlin

### ON-LINE QLunch: Jitendra Prakash

**Speaker:**Jitendra Prakash from QMATH

### ON-LINE QLunch: Ian Jauslin

**Speaker:**Ian Jauslin from Princeton University

### ON-LINE QLunch: Ion Nechita

**Speaker:**Ion Nechita

### ON-LINE QLunch: Fault-tolerant coding for quantum communication

**Speaker:**Alexander Müller-Hermes from Université de Lyon I

### ON-LINE QLunch: Petar Popovski

**Speaker:**Petar Popovski from AAU

### ON-LINE QLunch: Meng Yang

**Speaker:**Meng Yang from QMATH

### ON-LINE QLunch: Andreas Bluhm

**Speaker:**Andreas Bluhm from QMATH

### ON-LINE QLunch: Daniel Stilck and Christoph Hirche

**Speakers:**Daniel Stilck and Christoph Hirche from QMATH

### ON-LINE QLunch: Vladimir Lysikov

**Speaker:**Vladimir Lysikov from QMATH

### ON-LINE QLunch: Morten Kjaergaard

**Speaker:**Morten Kjaergaard from NBI

### ON-LINE QLunch: Alvin Moon

**Speaker:**Alvin Moon from QMATH

### QLunch: Christian Majenz

**Speaker:**Christian Majenz from QuSoft

### QLunch: Daniel Stilck França

**Speaker:**Daniel Stilck França from QMATH

### QLunch: Nicholas Gauguin Houghton-Larsen

**Speaker:**Nicholas Gauguin Houghton-Larsen from QMATH

### QLunch: Marie Fialová

**Speaker:**Marie Fialová from QMATH

### QLunch:Bergfinnur Durhuus

**Speaker:**Bergfinnur Durhuus from QMATH

### QLunch: Frederik Ravn Klausen

**Speaker:**Frederik Ravn Klausen from QMATH

### QMATH Seminar: Jens Hoppe

**Speaker:**Jens Hoppe

### QLunch: Sigurd Storgaard

**Speaker:**Sigurd Storgaard

### QLunch: Daniel Stilck França

**Speaker:**Daniel Stick França from QMATH

### QLunch: Efficient simulation of random states and random unitaries

**Speaker:**Christian Majenz from QuSoft

### ON-LINE QLunch: Thor Gabelgaard Nielsen

**Speaker:**Thor Gabelgaard Nielsen

### ON-LINE QLunch: Peter Harremoes

**Speaker:**Peter Harremoes

### ON-LINE QLunch: Tommaso Guaita

**Speaker:**Tommaso Guaita, The Max Planck Institute of Quantum Optics

### ON-LINE QLunch: Christopher Cedzich

**Speaker:**Christopher Cedzich, Leibniz Universität Hannover

### ON-LINE QLunch: Jørgen Rasmussen

**Speaker:**Jørgen Rasmussen, University of Queensland

### ON-LINE QLunch: Finite group velocity implies quasi-locality of interactions

**Speaker:**Henrik Wilming, ETH Zürich

### ON-LINE QLunch: Péter Vrana

**Speaker:**Péter Vrana, Budapest University of Technology and Economics

### ON-LINE QLunch: Niels Benedikter

**Speaker:**Niels Benedikter

### ON-LINE QLunch: Torben Krüger

**Speaker:**Torben Krüger

### ON-LINE QLunch: Jan Philip Solovej

**Speaker:**Jan Philip Solovej

### CANCELLED ON-LINE QLunch: Jørgen Rasmussen

**Speaker:**Jørgen Rasmussen, University of Queensland

### ON-LINE QLunch: Andreas Bluhm

**Speaker:**Andreas Bluhm

### ON-LINE Lunch: Jitendra Prakash

**Speaker:**Jitendra Prakash

### QLunch: MIP* = RE (video)

**Speaker:**Henry Yuen

### QLunch: Nika Akopian

**Speaker:**Nika Akopian from DTU

### QLunch with Amanda Young

### QLunch: The catalytic entropy conjecture

**Speaker:**Henrik Wilming, ETH Zurich

### QLunch with Cambyse Rouzé

### QLunch with Yinan Li

### QLunch: Entanglement renormalization and wavelet theory

**Speaker:**Freek Witteveen from QuSoft

### QLunch: Quantum Photonics for AI and AI for Quantum Photonics

**Speaker:**Jacques Carolan from NBI

### QLunch: Nodal Sets of Random Spherical Harmonics

**Speaker:**Mikhail Sodin, Tel Aviv University

### QLunch: Tensor network representations from the geometry of entangled states

**Speaker:**Matthias Christandl from QMATH

### QLunch: Distributed quantum sensing in a CV network

**Speaker:**Johannes Borregaard from QMATH

### QLunch: Structure from Non-Signalling

**Speaker:**Nicholas Gauguin Houghton-Larsen from QMATH

### QLunch: Quantum isomorphism is equivalent to equality of homomorphism counts from planar graphs

**Speaker:**David Roberson from DTU

### QLunch: The effect of noise in boson sampling

**Speaker:**Raúl Garcia-Patron, Université Libre de Bruxelles

### QLunch:The Dilute Limit of Interacting Bose Gases

**Speaker:**Jan Philip Solovej from QMATH

### QLunch:Varieties of sum of powers, Stiefel manifolds and their degrees

**Speaker:**Fulvio Gesmundo from QMATH

### QLunch: Is there such a thing as private information?

**Speaker:**Charles Bennett from IBM Research

### QLunch: Faster quantum and classical SDP approximations for quadratic binary optimization

**Speaker:**Daniel Stilck França from QMATH

### QLunch: Dyonic zero-energy modes

**Speaker:**Michele Burrello from NBI

### QLunch: Quantum correlations under restricted transfer of information

**Speaker:**Jonatan Bohr Brask from DTU

### QLunch: Recent results on Quantum Channel Discrimination

**Speaker:**Christoph Hirche from QMATH

### QLunch: Compatibility of quantum measurements and inclusion constants for free spectrahedra

**Speaker:**Andreas Bluhm from QMATH

### QLunch: Negative Wigner functions and Quantum Computing

**Speaker:**Göran Johansson from Chalmers University of Technology

### QLunch: On tensors of minimal border rank

**Speaker:**Vladimir Lysikov from QMATH

### QLunch: A polynomial-time algorithm for ground states of spin trees

**Speaker:**Nilin Abrahamsen from MIT

### QLunch: Preparation and Compression of Symmetric Pure Quantum States

**Speaker:**Andreas Baertschi, Los Alamos National Laboratory

### QLunch: Exact correlation functions of the principal chiral model

**Speaker:**Peter Orland, Baruch College, CUNY.

### QLunch: Nonlocal and nonabelian properties of Majorana bound states

**Speaker:**Karsten Flensberg from NBI

### QLunch: Kac-Rice fixed point analysis for large complex systems

**Speaker:**Jesper Ipsen, University of Melbourne

### QLunch: Hamiltonian Learning on Superconducting Qubits Using Bayesian Inference

**Speaker:**Natalie Pearson from ETH Zürich/NBI

### QLunch: Blind Tomography via Compressed Sensing

**Speaker:**Ingo Roth, Freie Universität Berlin

### QMATH-OpAlg Seminar: Computational complexity and the quantum value of non-local games

**Speaker:**William Slofstra, University of Waterloo (Department of Mathematics) and the Institute for Quantum Computing

### QLunch: A Quantum Kac Model

**Speaker:**Michael Loss, Georgia Institute of Technology

### QMATH Seminar: Generalized geometric Bogoliubov theory for the Bose-Hubbard model

**Speaker:**Lucas Hackl, the Max Planck Harvard Research Center for Quantum Optics

### QLunch: The Mysteries of Liouville Theory

**Speaker:**Antti Kupiainen, University of Helsinki

### QLunch: Faces of the Stabiliser Polytope and Robustness Measures

**Speaker:**Arne Heimendahl, Universität zu Köln

### QLunch: Towards understanding the algorithmic complexity of calculating the Ising partition function

**Speaker:**Martin Loebl, Charles University, Prague

### QLunch: The Quantum Information Bottleneck: Properties and Applications

**Speaker:**Christoph Hirche, Universitat Autonoma de Barcelona

### QLunch:Average mixing matrix of quantum walks

**Speaker:**Krystal Guo, Université libre de Bruxelles

### QLunch: Apolarity theory, Waring rank and partial derivatives

**Speaker:**Fulvio Gesmundo from QMATH

### QLunch:Fourier Expansion of the Fermion k-Body Reduction

### QLunch: Construction of Wannier functions for insulators and metals

**Speaker:**Antoine Levitt from Inria Paris

### QLunch: Propagators on curved spacetimes and balanced geometric Weyl quantization

**Speaker:**Jan Derezinski, University of Warszawa

### QLunch: From affine sl(2) to Virasoro

**Speaker:**Jørgen Rasmussen, University of Queensland

### QLunch: Decomposability of Linear Maps under Tensor Powers

**Speaker:**Alexander Müller-Hermes from QMATH

### GAMP/QMATH Seminar: Schmidt number of bipartite and multipartite states under local projections

**Speaker:**Yu Yang, Chongqing Technology and Business University

### QLunch: Summoning Quantum Information

**Speaker:**Ignacio Amores Sesar, University of Copenhagen

### QLunch: One-way quantum repeaters with photonic cluster states

**Speaker:**Johannes Borregaard from QMATH

### QLunch: An index theorem for quantum charge transport

**Speaker:**Alex Bols from KU Leuven

### QLunch:The Keyl-Werner theorem and the spin of a mean-field state

**Speaker:**Robin Reuvers from University of Cambridge

### QSeminar: Introduction to anyonic quantum gates II

**Speaker:**Claire Levaillant

### QSeminar: Introduction to anyonic quantum gates I

**Speaker:**Claire Levaillant

### QLunch: A quantum code for quantum homomorphic encryption and malleable quantum shared secrets

**Speaker:**Si-Hui Tan from Singapore University of Technology and Design and Visiting Guest Researcher at NBIA.

### QLunch: Lieb–Thirring inequalities and Weyl-type asymptotics for difference operators

### QLunch: Tree bijections for 2d Causal Triangulation

**Speaker:**John Wheater from University of Oxford

### QLunch: The structure of 3-dimensional causal triangulations

**Speaker:**Thordur Jonsson, University of Iceland

### QLunch: Non-closure of the set of quantum correlations

**Speaker:**Jitendra Prakash from QMATH

### QLunch: Formulas of Szegő type for the periodic Schrödinger operator

**Speaker:**Bernhard Pfirsch from University College London

### QLunch: Constructing local frustration free Lindbladians with given MPDOs as stable space

**Speaker:**Dmytro Bondarenko from University of Hannover

### QLunch: Quasi-factorization of the quantum relative entropy

**Speaker:**Angela Capel from Universidad Autónoma de Madrid

### GAMP/QMATH Seminar: Tsirelson's problems and the entanglement breaking rank

**Speaker:**Jitendra Prakash from University of Waterloo

### QLunch: Schur-Weyl duality and entanglement

**Speaker:**Robin Reuvers from University of Cambridge

### QLunch: Oddities of Quantum colorings

**Speaker:**Laura Mančinska from QMATH

### QLunch: Connes' embedding problem and quantum XOR games

**Speaker:**Samuel Harris, University of Waterloo

### QLunch: Quantum Flag Manifolds and Quantum Cluster Algebras

**Speaker:**Hans Plesner from the Department of Mathematical Sciences, KU

### QLunch: Quantum computing with Fibonacci anyons

**Speaker:**Claire Levaillant from University of California

### QLunch: Hardy-Lieb-Thirring Inequalities for Fractional Pauli Operators

**Speaker:**Gonzalo Bley from Aarhus University

### QLunch: A Note on Arbitrary Group Quantum-Secure PRPs

**Speaker:**Hector Bjoljahn Hougaard

### GAMP/QMATH Lecture: Semidefinite Optimization for Quantum Information Processing

**Speaker:**Xin Wang from University of Technology Sydney

### QLunch: Markovianizing cost of tripartite quantum states

**Speaker:**Eyuri Wakakuwa, University of Tokyo, Japan

### QLunch: Communication games reveal preparation contextuality

**Speaker:**Armin Tavakoli from University of Geneva

### QLunch: Unforgeable quantum encryption

### QLunch: On the interplay between algebraic geometry and complexity theory

### QLunch: Geometry of the quantum set of correlations

### Quantum Lunch: Entanglement and Chaos: Linear entropy production at instabilities

### Quantum Lunch: The Lee-Huang-Yang Formula for Dilute Bose Gases

### Quantum Lunch: Quantum Learning Algorithms

**Speaker:**Alexander Poremba from Heidelberg University

### QLunch: The Entropy Power Inequality with quantum memory

### QMATH Lecture: Lieb-Thirring inequality and gradient correction

### QLunch: The excitation spectrum of Bose gases interacting through singular potentials

### QLunch: On the stability of the quantum Darmois-Skitovich theorem

### QMATH Lecture: Logical paradoxes in deterministic quantum state injection

### Quantum Lunch: Peierls-Bogolyubov's inequality for deformed exponentials

### QMATH/GAMP Lecture: Contextuality and Noncommuative Geometry in Quantum Mechanics

### Quantum Lunch: General Error Correction for MERA Codes

### QLunch: Symmetry and Combinatorics for Identical Quantum Systems

### QLunch: Quantum framework from simple physical principles for single systems

### QMATH Lecture: Asymptotic entanglement concentration of W states

### QLunch: Astronomical telescopes with quantum memories

### Quantum Lunch: Ultimate data hiding in quantum mechanics and beyond

### Quantum Lunch: Local boundary states imply gap for the parent Hamiltonian of PEPS

### Quantum Lunch: Quantum simulations with noisy quantum computers

### Quantum Lunch: A Reformulation of the Dirac-Frenkel Principle and the Bogoliubov-de-Gennes equations

### QMATH/GAMP Lecture: Entropy accumulation

### QMATH Lecture: On the dynamics of multi-component condensates: mixtures and spinors

**Speaker:**Alessandro Olgiati from SISSA Trieste

### Joint SYM and QMATH Lecture: Tsirelson's problem

### Quantum Lunch: The PPT^2 conjecture in dimension 3

### Quantum Lunch: Feynman-Kac formulas for the ultra-violet renormalized Nelson model

### Quantum Lunch: To what extent can information propagation decouple from energy propagation?

**Speaker:**Robert Jonsson, Chalmers Universitet Göteborg

### Quantum Lunch: Fun with diagram algebras

### Quantum Lunch: Quantum information on Jordan algebras

**Speaker:**Peter Harremoës

### Quantum Lunch: Self-testing of quantum states: how to identify which state Alice and Bob share by letting them play a (nonlocal) game

### Quantum Lunch: Universality in interacting topological insulators

### Quantum Lunch: Semi-device-independent quantum randomness generation

### Quantum Lunch: Nonabelian braiding by topological solitons

### Quantum Lunch: Information-theoretic non-malleability and authentication

### Quantum Lunch: Picking holes and cutting corners to achieve Clifford gates with the surface code

### Quantum Lunch: Random tensor networks and multipartite entanglement

### Quantum Lunch: The martingale method meets the detectability lemma

### Quantum Lunch: Schrödinger Operators in Some Curvature Problems

### Quantum Lunch: Disentangling entangled quantum states

### Quantum Lunch: Autonomous feedback for superconducting qubits

### Quantum Lunch: An outsider's view on the mathematical foundations of machine learning

### Quantum Lunch: Reality of Temperley-Lieb Hamiltonian spectra

### Quantum Lunch: Quantum entropy derived from first principles

### Quantum Lunch: Quantum homomorphic encryption

### Quantum Lunch: Vote Talk

Either:

*Berry curvature and a more beautiful classical mechanics*.

Or:

*Survival, decay, and topological protection in non-Hermitian quantum transport*.

### Quantum Lunch: Landauer's principle and the energy cost of measurement

### After Quantum Lunch: Entropy power inequalities for qudits

### Quantum Lunch: Stahl's Theorem

### Quantum Lunch: Quantum gate learning in engineered qubit networks: Toffoli gate with always-on interactions

### Quantum Lunch: Topological edge states are monogamous

### Quantum Lunch: Key Distillation

### Quantum Lunch: Dirac operators with magnetic link

### Quantum Lunch: Tradeoff bounds for local error correction

### Quantum Lunch: Pattern formation in biological systems & Electroweak baryogenesis in 2HDMs

### Quantum Lunch: Trace inequalities for arbitrary many matrices via pinching

### Quantum Lunch: A Pfaffian formula for monomer-dimer partition functions

### Quantum Lunch: Determinism and causality. Which aspects are shared between classical physics and quantum physics?

### Quantum Lunch

Title: TBA

### Quantum Lunch: Variational Expressions for Quantum Relative Entropies

Abstract: Distance measures between quantum states like the trace distance and the fidelity can naturally be defined by optimizing a classical distance measure over all measurement statistics that can be obtained from the respective quantum states. In contrast, Petz showed that...

### Quantum Lunch

Title: K-theory and topological insulators

Abstract: This will be an introductory seminar aimed at showing some basic facts in index theory and K-theory in the context of topological insulators.

### Quantum Lunch

Title: TBA

### Quantum Lunch

Title: Error-correction in non-abelian anyon models

Abstract:

Scalable anyonic topological quantum computation requires the error-correction of non-abelian anyon systems. In contrast to abelian topological codes ...

### Quantum Lunch

Title: On the Fermi Polaron in Two Dimensions

Abstract: We investigate the quantum system of a Fermi gas interacting

attractively with a single impurity by contact interaction in a

two-dimensional box. The contact interaction is implemented by a

limiting procedure ...

### Quantum Lunch: Extensions of the entanglement entropy for symmetry protected topological order

Speaker: Shunji Matsuura

### Quantum Lunch: Interaction Effects in Spin-Wave Theory

Speaker: Niels Benedikter

### Quantum Lunch: Random permutations and the mean-field Heisenberg model

Speaker: Jakob Björnberg

### Quantum Lunch: Renormalising entanglement distillation

Title: Renormalising entanglement distillation

### Quantum Lunch: Entanglement Measures

Speaker: Roberto Ferrara

### Quantum Lunch: Accurate atomic radii from Thomas-Fermi Theory

Speaker: Jan Philip Solovej

### Quantum Lunch: Bogoliubov correction to the mean-field dynamics of interacting bosons

Speaker: Marcin Napiórkowski

### Quantum Lunch: Quantum Circuits for Isometries

Speaker: Raban Iten

Abstract: Every quantum operation can be decomposed into a sequence of single-qubit and Controlled-Not (C-NOT) gates. In many experimental architectures, single-qubit gates are relatively ‘cheap’ to perform compared to C-NOTs (for instance, being less susceptible to noise), and hence it is desirable to minimize the number of C-NOT gates required to implement a circuit. I will consider the task of constructing an arbitrary isometry from m qubits to n qubits, while trying to minimize the number of C-NOT gates required. I will show a lower bound and then give an explicit gate decomposition that gets within a factor of about two of this bound. Through Stinespring’s theorem this points to a C-NOT-efficient way to perform an arbitrary quantum operation.

### Quantum Lunch

Title: Anyons in the average-field approximation

### Quantum Lunch: Non-binding of strongly coupled many-polarons in dimensions two and three

Speaker: Anton Samojlow

### Quantum Lunch: Estimates for the lowest eigenvalue of magnetic Laplacians.

Speaker: Fabian Portmann

### Quantum Lunch: Localization from superselection rules in translation invariant systems

Abstract: We study a translation invariant spin model in a three-dimensional regular lattice, called the cubic code model, in the presence of arbitrary extensive perturbations. Below a critical perturbation strength, we show that most states with finite energy are localized; the overwhelming majority of such states have energy concentrated around a finite number of defects, and remain so for a time that is near-exponential in the distance between the defects. This phenomenon is due to an emergent superselection rule and does not require any disorder. This is joint a joint work with Jeongwan haah.(1505.01480)

### Quantum Lunch: Bogoliubov theory at positive temperature

Abstract: I will discuss Bogoliubov theory in the translation invariant case of a Bose gas. The theory arises by restriction to translation invariant quasi-free states. I will introduce the positive temperature pressure functional and the corresponding ground state energy functional...

### Quantum Lunch: Quantum-information processing with solid-state single-photon sources

### Quantum Lunch: The fractional Laplacian on bounded domains

### Quantum Lunch: Learning and testing of mixed state spectra

**Speaker:**John Wright

**Abstract:**

### Quantum Lunch: Defining work from operational principles

### Quantum Lunch: An adaptive attack on Wiesner's quantum money

Abstract:

### Quantum Lunch: an introduction to Hypercontractivity and Log-Sobolev inequalities, and their applications in Mathematical Physics and Quantum Information

### Quantum Lunch: Factorizable completely positive maps and Quantum Information Theory

Title: Factorizable completely positive maps and Quantum Information Theory

### Quantum Lunch: Energy Levels of Dipoles in Graphene

Speaker: Simone Rademacher

### Quantum Lunch

Title: TBA

### Quantum Lunch

### Quantum Lunch: Two results in topology, motivated by quantum computation

Speaker: Gorjan Alagic

### Quantum Lunch

Title: TBA

### Quantum Lunch: Heralded quantum gate with integrated error detection

### Quantum Lunch: Error distributions on large entangled states with non-Markovian dynamics

### Quantum Lunch: A flea on Schrödinger's cat

### Quantum Lunch: Cryptography

### Quantum Lunch: Ground state entanglement constrains low energy excitations

### Quantum Lunch

Speaker: Niels Benedikter

### Quantum Lunch

Speaker: Alexander Mueller-Hermes

Abstract: Quantum memories can be regarded as quantum channels that transmit information through time without moving it through space. Aiming at a reliable storage of information we may thus not only encode at the beginning and decode at the end, but also intervene during the transmission - a possibility not captured by the ordinary capacities....

### Quantum Lunch

Speaker: Jeremy Sok

### Quantum Lunch: Finding large gaps between tensor rank and border rank via algebras

Abstract: In quantum information theory, it is well-known that the GHZ-state 000+111 cannot be (SLOCC-)transformed into the W-state 000+101+011, but the W-state can be approximated with states from the GHZ-orbit. The W-state is thus an example of a tensor of *tensor rank* 3 that can be approximated by tensors of *tensor rank* 2....