Publications


Qubits, qutrits, and ququads stored in single photons from an atom-cavity system

ADVANCES IN PHOTONICS OF QUANTUM COMPUTING, MEMORY, AND COMMUNICATION VIII 9377 (2015) ARTN 937709

A Holleczek, O Barter, G Langfahl-Klabes, A Kuhn


Cavity Induced Interfacing of Atoms and Light

in Engineering the Atom-Photon Interaction: Controlling Fundamental Processes with Photons, Atoms and Solids, Springer (2015) 1
Part of a series from Nano Optics and Nano Photonics

A Kuhn

This chapter introduces cavity-based light-matter quantum interfaces, with a single atom or ion in strong coupling to a high-finesse optical cavity. We discuss the deterministic generation of indistinguishable single photons from these systems; the atom-photon entanglement intractably linked to this process; and the information encoding using spatio-temporal modes within these photons. Furthermore, we show how to establish a time-reversal of the aforementioned emission process to use a coupled atom-cavity system as a quantum memory. Along the line, we also discuss the performance and characterisation of cavity photons in elementary linear-optics arrangements with single beam splitters for quantum-homodyne measurements.


Photonic Quantum Logic with Narrowband Light from Single Atoms

arXiv (2015) 1508.03266

A Holleczek, O Barter, A Rubenok, J Dilley, PBR Nisbet-Jones, G Langfahl-Klabes, GD Marshall, C Sparrow, JL O'Brien, K Poulios, A Kuhn, JCF Matthews

We demonstrate quantum logic using narrow linewidth photons that are produced under nearly perfect quantum control from a single Rb atom strongly coupled to a high-finesse cavity. We use a controlled- NOT gate integrated into a photonic chip to entangle these photons, and we observe non-classical correlations between events separated by periods exceeding the travel time across the chip by three orders of magnitude. This enables quantum technology that will use the properties of both narrowband single photon sources and integrated quantum photonics, such as networked quantum computing, narrow linewidth quantum enhanced sensing and atomic memories.


Fast algorithms for generating binary holograms

arXiv (2014) 1409.1841

D Stuart, O Barter, A Kuhn

We describe three algorithms for generating binary-valued holograms. Our methods are optimised for producing large arrays of tightly focussed optical tweezers for trapping particles. Binary-valued holograms allow us to use a digital mirror device (DMD) as the display element, which is much faster than other alternatives. We describe how our binary amplitude holograms can be used to correct for phase errors caused by optical aberrations. Furthermore, we compare the speed and accuracy of the algorithms for both periodic and arbitrary arrangements of traps, which allows one to choose the ideal scheme depending on the circumstances.


Single Emitters in Isolated Quantum Systems

in Single-Photon Generation and Detection, Elsevier 45 (2013) 467-539
Part of a series from Experimental Methods in the Physical Sciences

GS Solomon, C Santori, A Kuhn


Photonic qubits, qutrits and ququads accurately prepared and delivered on demand

NEW JOURNAL OF PHYSICS 15 (2013) ARTN 053007

PBR Nisbet-Jones, J Dilley, A Holleczek, O Barter, A Kuhn


Single-photon absorption in coupled atom-cavity systems

PHYSICAL REVIEW A 85 (2012) ARTN 023834

J Dilley, P Nisbet-Jones, BW Shore, A Kuhn


Control and manipulation of cold atoms in optical tweezers

NEW JOURNAL OF PHYSICS 14 (2012) ARTN 073051

C Muldoon, L Brandt, J Dong, D Stuart, E Brainis, M Himsworth, A Kuhn


Highly efficient source for indistinguishable single photons of controlled shape

NEW JOURNAL OF PHYSICS 13 (2011) ARTN 103036

PBR Nisbet-Jones, J Dilley, D Ljunggren, A Kuhn


Spatial light modulators for the manipulation of individual atoms

APPLIED PHYSICS B-LASERS AND OPTICS 102 (2011) 443-450

L Brandt, C Muldoon, T Thiele, J Dong, E Brainis, A Kuhn


Quantum memories for single photons from cavity-QED

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 (2011)

A Kuhn, P Nisbet, J Dilley, G Langfahl-Klabes, M Himsworth

We investigate the feasibility of implementing an elementary building block for quantum information processing. The combination of a deterministic single photon source based on vacuum stimulated adiabatic rapid passage [1,2], and a quantum memory based on electromagnetically induced transparency in atomic vapour is outlined [3]. Both systems are able to produce and process temporally shaped wavepackets which provides a way to maintain the indistinguish ability of retrieved and original photons. We also propose an efficient and robust repeat-until-success quantum computation scheme based on this hybrid architecture. © 2011 IEEE.


EIT-based quantum memory for single photons from cavity-QED

APPLIED PHYSICS B-LASERS AND OPTICS 103 (2011) 579-589

M Himsworth, P Nisbet, J Dilley, G Langfahl-Klabes, A Kuhn


Single photons made-to-measure

NEW JOURNAL OF PHYSICS 12 (2010) ARTN 063024

GS Vasilev, D Ljunggren, A Kuhn


Cavity-based single-photon sources

CONTEMPORARY PHYSICS 51 (2010) 289-313

A Kuhn, D Ljunggren


Implementation of atom-photon interfaces for quantum networking

Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference: 2010 Laser Science to Photonic Applications, CLEO/QELS 2010 (2010)

L Brandt, C Muldoon, T Thiele, J Dilley, P Nisbet, G Langfahl-Klabes, A Kuhn

We present two schemes for interfacing and manipulating individual atoms: One involves an array of dipole-traps using a spatial light modulator. The other implements cavitybased single photon generation combined with photon storage. © 2010 Optical Society of America.


Implementations of atom-photon interfaces for quantum networking

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference (2009)

PBR Nisbet, J Dilley, G Langfahl-Klabes, D Ljunggren, G Vasilev, A Kuhn


Optical tweezers for manipulating single atoms

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference (2009)

L Brandt, C Muldoon, E Brainis, A Kuhn


Optimum pulse shapes for stimulated Raman adiabatic passage

PHYSICAL REVIEW A 80 (2009) ARTN 013417

GS Vasilev, A Kuhn, NV Vitanov


Coherent imaging of extended objects

OPTICS COMMUNICATIONS 282 (2009) 465-472

E Brainis, C Muldoon, L Brandt, A Kuhn


Towards a scalable dipole-trapping scheme for neutral atoms

Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series (2008)

L Brandt, C Muldoon, E Brainis, A Kuhn

We present a new scheme for trapping single atoms in separate dipole-traps and manipulating them individually. It relies on a spatial light-modulator to create the traps and will find applications in cavity-QED. © 2008 Optical Society of America.