1.7k citations · 5.4k across the 27 of their papers we have counts for
27 papers
Quantifying Pauli Errors in Single-Photon Resource-State Generation
Yuktee Gupta, Andrew C. Doherty, Sahand Mahmoodian
We propose a scheme to compute Pauli error rates in photonics-based quantum error correction using experimental observables of single photons produced from quantum emitters. We sho…
Dynamic stimulated emission for deterministic addition and subtraction of propagating photons
Haoyuan Luo, Parth S. Shah, Frank Yang +2
Photon subtraction and addition are essential non-Gaussian processes in quantum optics, where conventional methods using linear optics and number-resolving detection often suffer f…
Non-Gaussian Photon Correlations in Weakly Coupled Atomic Ensembles
Yangming Wang, Sahand Mahmoodian
We develop a scattering theory formalism and use it to predict that a resonantly driven atomic ensemble weakly coupled to an optical mode can generate light with non-Gaussian corre…
Using matrix-product states for time-series machine learning
Joshua B. Moore, Hugo P. Stackhouse, Ben D. Fulcher +1
Matrix-product states (MPS) have proven to be a versatile ansatz for modeling quantum many-body physics. For many applications, and particularly in one-dimension, they capture rele…
Emergence of unidirectionality and phase separation in optically dense emitter ensembles
Kasper J. Kusmierek, Max Schemmer, Sahand Mahmoodian +1
The transmission of light through an ensemble of two-level emitters in a one-dimensional geometry is commonly described by one of two emblematic models of quantum electrodynamics (…
Efficient optical cat state generation using squeezed few-photon superposition states
Haoyuan Luo, Sahand Mahmoodian
Optical Schrödinger cat states are non-Gaussian states with applications in quantum technologies, such as for building error-correcting states in quantum computing. Yet the efficie…
Broadband terahertz near-field excitation and detection of silicon photonic crystal modes
Kseniia Lezhennikova, Sahand Mahmoodian, Boris T. Kuhlmey +4
Chip-based terahertz (THz) devices are emerging as versatile tools for manipulating mm-wave frequencies in the context of integrated high-speed communication technologies for poten…
Higher-order mean-field theory of chiral waveguide QED
Kasper J. Kusmierek, Sahand Mahmoodian, Martin Cordier +6
Waveguide QED with cold atoms provides a potent platform for the study of non-equilibrium, many-body, and open-system quantum dynamics. Even with weak coupling and strong photon lo…
Direct observation of photon bound states using a single artificial atom
Natasha Tomm, Sahand Mahmoodian, Nadia O. Antoniadis +6
The interaction between photons and a single two-level atom constitutes a fundamental paradigm in quantum physics. The nonlinearity provided by the atom means that the light-matter…
Unraveling two-photon entanglement via the squeezing spectrum of light traveling through nanofiber-coupled atoms
Jakob Hinney, Adarsh S. Prasad, Sahand Mahmoodian +5
We observe that a weak guided light field transmitted through an ensemble of atoms coupled to an optical nanofiber exhibits quadrature squeezing. From the measured squeezing spectr…
A wave-function ansatz method for calculating field correlations and its application to the study of spectral filtering and quantum dynamics of multi-emitter systems
Sumanta Das, Liang Zhai, Mantas Čepulskovskis +4
We develop a formalism based on a time-dependent wave-function ansatz to study correlations of photons emitted from a collection of two-level quantum emitters. We show how to simul…
Dynamics of many-body photon bound states in chiral waveguide QED
Sahand Mahmoodian, Giuseppe Calajó, Darrick E. Chang +2
We theoretically study the few- and many-body dynamics of photons in chiral waveguides. In particular, we examine pulse propagation through a system of two-level systems chiral…
Chiral Light--Matter Interaction Beyond the Rotating-Wave Approximation
Sahand Mahmoodian
I introduce and analyse chiral light--matter interaction in the ultrastrong coupling limit where the rotating-wave approximation cannot be made. Within this limit, a two-level syst…
Strongly correlated photon transport in waveguide QED with weakly coupled emitters
Sahand Mahmoodian, Mantas Čepulkovskis, Sumanta Das +3
We show that strongly correlated photon transport can be observed in waveguides containing optically dense ensembles of emitters. Remarkably, this occurs even for weak coupling eff…
Spin-photon interface and spin-controlled photon switching in a nanobeam waveguide
Alisa Javadi, Dapeng Ding, Martin Hayhurst Appel +13
Access to the electron spin is at the heart of many protocols for integrated and distributed quantum-information processing [1-4]. For instance, interfacing the spin-state of an el…
Spatially Adiabatic Frequency Conversion in Optoelectromechanical Arrays
Ondřej Černotík, Sahand Mahmoodian, Klemens Hammerer
Faithful conversion of quantum signals between microwave and optical frequency domains is crucial for building quantum networks based on superconducting circuits. Optoelectromechan…
Numerical modelling of the coupling efficiency of single quantum emitters in photonic-crystal waveguides
Alisa Javadi, Sahand Mahmoodian, Immo Söllner +1
Planar photonic nanostructures have recently attracted a great deal of attention for quantum optics applications. In this article, we carry out full 3D numerical simulations to ful…
Engineering chiral light--matter interaction in photonic crystal waveguides with slow light
Sahand Mahmoodian, Kasper Prindal-Nielsen, Immo Söllner +2
We design photonic crystal waveguides with efficient chiral light--matter interfaces that can be integrated with solid-state quantum emitters. By using glide-plane-symmetric wavegu…
Chiral Quantum Optics
Peter Lodahl, Sahand Mahmoodian, Søren Stobbe +5
At the most fundamental level, the interaction between light and matter is manifested by the emission and absorption of single photons by single quantum emitters. Controlling light…
Quantum networks with chiral light--matter interaction in waveguides
Sahand Mahmoodian, Peter Lodahl, Anders S. Sørensen
We propose a scalable architecture for a quantum network based on a simple on-chip photonic circuit that performs loss-tolerant two-qubit measurements. The circuit consists of two…
Single-photon nonlinear optics with a quantum dot in a waveguide
A. Javadi, I. Söllner, M. Arcari +9
Strong nonlinear interactions between photons enable logic operations for both classical and quantum-information technology. Unfortunately, nonlinear interactions are usually feebl…
Deterministic photon-emitter coupling in chiral photonic circuits
Immo Söllner, Sahand Mahmoodian, Sofie Lindskov Hansen +9
The ability to engineer photon emission and photon scattering is at the heart of modern photonics applications ranging from light harvesting, through novel compact light sources, t…
Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
M. Arcari, I. Söllner, A. Javadi +8
A quantum emitter efficiently coupled to a nanophotonic waveguide constitutes a promising system for the realization of single-photon transistors, quantum-logic gates based on gian…
Interfacing single photons and single quantum dots with photonic nanostructures
Peter Lodahl, Sahand Mahmoodian, Søren Stobbe
Photonic nanostructures provide means of tailoring the interaction between light and matter and the past decade has witnessed a tremendous experimental and theoretical progress in…