### Quantum Photonics with Solids and Atoms

Prof. Dr. Hugues de Riedmatten

- Activities:

Our research program lies at the crossing between quantum information science, quantum optics and nanoscale science. In particular, we are interested in the quantum control of light matter interaction between single photons and atomic ensembles implemented with rare-earth doped solids and cold atomic gases. The goal of the research is to develop the physical resources to implement quantum information networks and quantum repeaters which are required to increase the maximal distance of quantum communication. A more fundamental goal is to enable the observation of fascinating quantum effects, such as entanglement, with distant material systems and to explore and extend the limits of quantum coherence in complex material systems.

- Position(s) Available:
- Post-doctoral researcher in quantum nonlinear optics with cold atomic ensembles

- Research Topics:
- Quantum Frequency Conversion
- Quantum Optics With Laser Cooled Atomic Ensembles
- Quantum Light Sources Compatible With Solid State Quantum Memories
- Quantum Non-Linear Optics At The Single Photon Level With Cold Rydberg Atoms
- Solid State Quantum Memories

- Links:
- Group homepage

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### Quantum Photonics with Solids and Atoms

Prof. Dr. Hugues de Riedmatten

- Group Leader
- Prof. Dr. Hugues de Riedmatten

- Research Fellows
- Margherita Mazzera

- Postdoctoral Researchers
- Bernardo Casabone
- Emanuele Distante
- Georg Heinze

- PhD Students
- Chetan Deshmukh
- Pau Farrera Soler
- Kutlu Kutluer
- Darío Lago Rivera
- Nicolas Maring
- Maria Auxiliadora Padron Brito
- Alessandro Seri

- Undergrad & Postgrad Students
- Marco Valentini

- Former Group Members
- Boris Albrecht, PhD Student
- Matteo Cristiani, Research Fellow
- Julia Fekete, Postdoc Researcher
- Mustafa Gündogan, PhD Student
- Patrick Matangaro Ledingham, Postdoc Researcher
- Daniel Rieländer, PhD Student

### Quantum Photonics with Solids and Atoms

Prof. Dr. Hugues de Riedmatten

- Regular Papers
**Quantum correlations between single telecom photons and a multimode on-demand solid state quantum memory**Phys. Rev. X**6**, 021028 (2017)**Solid-state source of nonclassical photon pairs with embedded multimode quantum memory**Phys. Rev. Lett.**118**, 230402 (2017)**Storing single photons emitted by a quantum memory on a highly excited Rydberg state**Nature Commun.**8**, 14072 (2017)**Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories**New J. Phys.**18**, 123008 (2016)**Generation of single photons with highly tunable wave shape from a cold atomic ensemble**Nature Commun.**7**, 13556 (2016)**Storage enhanced nonlinearities in a cold atomic Rydberg ensemble**Phys. Rev. Lett.**117**, 113001 (2016)**Nonclassical correlations between a C-band telecom photon and a stored spin-wave**Optica**3**, 1019-1024 (2016)**Integrated optical memory based on laser-written waveguides**Phys. Rev. Applied**5**, 054013 (2016)**Spectral-hole memory for light at the single-photon level**Phys. Rev. A**93**, 040302(R) (2016)**Quantum memory for photons**Phys. Today**68**, 42 (2015)**Controlled rephasing of single collective spin excitations in a cold atomic quantum memory**Phys. Rev. Lett.**115**, 160501 (2015)**Solid state spin-wave quantum memory for time-bin qubits**Phys. Rev. Lett.**114**, 230501 (2015)**Electrical control of optical emitter relaxation pathways enabled by graphene**Nature Phys.**11**, 281-287 (2015)**Storage of up-converted telecom photons in a doped crystal**New J. Phys.**16**, 113021 (2014)**A waveguide frequency converter connecting rubidium-based quantum memories to the telecom C-band**Nature Commun.**5**, 3376 (2014)**Quantum storage of heralded single photons in a praseodymium-doped crystal**Phys. Rev. Lett.**112**, 040504 (2014)**Prospective applications of optical quantum memories**J. Mod. Opt.**60**, 1519-1537 (2013)**Quantum frequency conversion of quantum memory compatible photons to telecommunication wavelengths**Opt. Express**21**, 19473-19487 (2013)**A long-term memory for light**Physics**6**, 80 (2013)**Ultranarrow-band photon-pair source compatible with solid state quantum memories and telecommunication networks**Phys. Rev. Lett.**110**, 220502 (2013) Highlighted in Physics**Coherent storage of temporally multimode light using a spin-wave atomic frequency comb memory**New J. Phys.**15**, 045012 (2013)**Quantum storage of a photonic polarization qubit in a solid**Phys. Rev. Lett.**108**, 190504 (2012) Highlighted in Physics

Highlighted in Physics World**Spectroscopic investigations of europium doped yttrium silicate for quantum memory applications**Phys. Rev. B**85**, 115111 (2012)**Quantum repeaters based on heralded qubit amplifiers**Phys. Rev. A**85**, 032313 (2012)**Photon-pair source with controllable delay based on shaped inhomogeneous broadening**Phys. Rev. A**83**, 053840 (2011)**Quantum repeaters based on atomic ensembles and linear optics**Rev. Mod. Phys.**83**, 33-80 (2011)**Precision requirements for spin-echo-based quantum memories**Phys. Rev. A**83**, 032315 (2011)**Quantum storage of photonic entanglement in a crystal**Nature**469**, 508–511 (2011) Highlighted in Nature

- Proceedings & Book Chapters
**Quantum light storage in solid state atomic ensembles**Engineering the atom-photon interaction (Springer, 2015)

- PhD Theses
**A Quantum light-matter interface with Rydberg polaritons in a cold atomic ensemble****Quantum light source compatible with solid-state quantum memories and telecom networks****Quantum control of single spin excitations in cold atomic quantum memories****Solid-state quantum memory for photonic qubits**

### Quantum Photonics with Solids and Atoms

Prof. Dr. Hugues de Riedmatten

**2017-06-21**The Secretary of Telecommunications, Cybersecurity and Digital Society of the Government of Catalonia visits ICFO As part of the initiative smartCAT, the visit aimed to show the current status of research in quantum technologies at ICFO.**2017-05-31**Single spin waves in a crystal highlighted in Physics ICFO researchers report simultaneously two studies that demonstrate the creation of quantum correlations between single photons and single spin waves in a crystal.**2017-03-24**Congratulations to New ICFO PhD graduate Dr. Emanuele Distante graduated with a thesis in “A Quantum Light-Matter Interface with Rydberg Polaritons in a Cold Atomic Ensamble”**2017-01-23**Correlated single photon stored in highly non-linear medium An ICFO study in Nature Communications reports on the storage of a correlated single photon emitted by a quantum memory in a highly excited Rydberg medium.**2016-11-28**Tailoring single photons waveshapes A source of syncronizable single photons with an arbitrary waveshape in Nature Communications**2016-11-24**Congratulations to New ICFO PhD graduate Dr. Daniel Rieländer graduated with a thesis in ‘Quantum Light Source Compatible with Solid-State Quantum Memories and Telecom Networks’**2016-07-04**Carl Zeiss Award for Young Researchers ICFO Postdoc Georg Heinze honoured**2015-12-23**Quantum Memories in Physics Today APS\' specialized magazine dedicates a piece on Quantum Memories and their importance in the world of quantum information networks.**2015-12-01**Congratulations to New ICFO PhD graduate Dr. Boris Albrecht graduated with a thesis in ‘Quantum control of single spin excitations in cold atomic quantum memories‘**2015-12-01**PhD Thesis Defense

BORIS ALBRECHT \'Quantum control of single spin excitations in cold atomic quantum memories\'**BORIS ALBRECHT**

Quantum Photonics with Solids and Atoms

ICFO-The Institute of Photonic Sciences, SPAIN**2015-10-22**Congratulations to New ICFO PhD graduate Dr. Mustafa Gündoğan graduated with a thesis in ‘Solid-State Quantum Memory for Photonic Qubits ‘**2015-10-22**PhD Thesis Defense

MUSTAFA GUNDOGAN \'Solid-State Quantum Memory for Photonic Qubits\'**MUSTAFA GUNDOGAN**

Quantum Photonics with Solids and Atoms

ICFO-The Institute of Photonic Sciences**2015-01-20**Graphene enables all-electrical control of energy flow from light emitters First signatures of graphene plasmons at telecommunications wavelength revealed**2014-09-17**Max Planck-Prince of Asturias Award Mobility Grants Three ICFO researchers awarded prestigious grant.**2014-03-04**Quantum Frequency Conversion for Quantum Memories A solid state quantum interface linking quantum memories to the telecommunication network in*Nature Communications*.**2013-07-22**Viewpoints in APS*Physics*Prof. Hugues de Riedmatten offers perspective on a long-term memory of light.**2013-05-30**A Photon Pair Source for Quantum Repeaters Physics highlights the demonstration of a novel quantum light source for solid state quantum memories by ICFO researchers.**2012-05-14**Solid State Quantum Storage for Polarization Qubits Physics highlights the first demonstration of a crystal quantum memory for polarization qubits by the group led by Hugues de Riedmatten.**2011-09-18**ERC Starting Grants to Hugues de Riedmatten and Morgan Mitchell The grants fund projects in quantum light matter interfaces and quantum metrology.**2011-05-19**QI Processing in Rare-Earth Doped Solids The 6th edition of the meeting was organized by Hugues de Riedmatten’s group on May 12-13, 2011.**2011-04-11**Quantum Repeaters Hugues de Riedmatten coauthors a review paper on quantum repeaters in Reviews of Modern Physics.**2011-01-19**Entangled Photon Stored in a Solid Prof. Hugues de Riedmatten co-authors a paper in Nature reporting the first demonstration of storage of an entangled photon onto a solid.