Quantum Optics Scientist - Spin-Based Quantum Systems

- About Quandela:

QuandelaisaEuropeandeeptechscale-up buildingmodular, scalable andenergy-efficientphotonicand spin-opticalquantum computers.

Our quantumcomputingplatformisaccessibleboththroughthe cloud and on-premises.

With ateamof morethan140 people,wedevelopourownhardware and software stack,fromsemiconductorquantumemittersandphotonicprocessors to quantum controlsystemsand quantumalgorithms.

Our ambitionistobuildlarge-scalefault-tolerantquantum computers capable ofsolvingproblemsbeyondthereachofclassicalcomputationusingQuandela'scutting-edgequantum dottechnology.

Achieving this vision requires not only advances in photonic quantum computing, but also the development of scalable spin-photon interfaces, distributed entanglement capabilities and future SPOQC (Spin-Optical Quantum Computing) architectures that will enable modular and fault-tolerant quantum systems.

- About this position:

You will joinQuandela'sSemiconductor OpticsTeam, a multidisciplinary group combiningexpertisein quantum optics, spin physics, semiconductor technologies,electronicsand quantum information.

The team develops the building blocks required for future hybrid spin-photon quantum computing architectures, bridging quantum science, technology development and product-oriented demonstrators.

Inthisrole,youwillcontributetothedevelopmentand validation of photon-mediatedspin–spinentanglementprotocolswhileimprovingthe performance of spin-basedquantumsystems.

Current challenges include enhancing spin coherenceagainst decoherence,validatinghigh-fidelityspinqubit operations, developing advanced optical controltechniquesand strengthening theory-to-experiment feedback loops for future multi-spin architectures.

Beyond the scientific challenges, you will contribute tobuildingdemonstratorsthatwill directly becomepart of future quantum computing platforms. Success in this role relies on combining scientific rigor, collaborationacrossQuandelasproduction and researchdepartments.

- What you'll do:

As a Quantum Optics Scientist, you will contribute to the development of spin-based quantum technologies supporting Quandela's longterm quantum computing roadmap.

Yourworkwillinclude:

• Design,developandimproveopticalexperimentsinvolvingspin-photon sources
• Develop and implement optical control schemes for spininitialization,readoutand characterization
• Characterize keyspinproperties including coherence,operationfidelityandentanglementquality.
• Collaboratewiththeory,electronicsandsemiconductortechnologyteamstoimprovedeviceperformance andaccelerateexperimentalprogress.
• Contributingto thedevelopmentand validation of photon-mediatedspin–spinentanglementprotocols and future multi-spin architectures .
• Validateand translatescientific advances intorobusttechnological building blocks for futurehybridquantum computing systems.

- How You Will Grow:

During your first 3 months

YouwillbecomefamiliarwithQuandela'sexperimentalplatforms, spin-control techniques andongoingdemonstratorprogramswhilecontributingtoexistingprojects.

Within6 months

Youwilltakeownershipofspecificscientificandexperimentalactivities,contributetoprotocoldevelopmentandactivelyparticipateintheory-to-experimentfeedbackloops.

Within1year

Youwillplayakeyroleinadvancingdistributedentanglementdemonstrations,contributeoriginalideasandhelpshapefuturedevelopmentswithintheteam.

- Ideal Profile:

• PhD inSpinPhysics, Quantum Optics, Spin-Photon interfaces in the solid stateorrelated fields.
• Hands-on experimental research experience in spin physics, quantum optics, semiconductor quantum systems, quantumemitters,or closely related areas.
• Experience developing,optimizing, and troubleshooting experimental quantum systems in a laboratory environment.
• Familiaritywithtechniquessuchas spincontrol,opticalmanipulation,coherencemeasurements, single-photoncharacterizationorrelatedexperimentalmethods.
• Comfortableworkingalongsidephysicists,engineersandtheoristsin amultidisciplinaryenvironment.
• Curious, collaborative andmotivatedbychallengingscientificandtechnologicalproblems.

Bonus Points

Experiencein one or more of thefollowingareasishighlyappreciated:

• Spin-photon interfaces
• Semiconductorquantumemittersand quantum dots
• Ultrafastopticsandadvancedopticalcontrol
• Fast control electronics, cryogenic experimental platforms, and advanced laboratory instrumentation.

If relevant,weencourageyouto highlightyourlevelofexperiencewiththesetopics inyourCV, publications or applicationmaterials.

- CareerStage & Team Contribution:

We welcome applications from candidates with a PHD in a relevant field, including recent PhD graduates and researchers with up to approximately three years of postodctoral or equivalent R&D experience.

Expereience candidates will take a leading role in shaping technical directions, accelerating key developments, and mentoring younger team members. Strong early-carrer candidates will be suported in developing technical independant though pressive ownership of experimental activities.

Beyond technicalexpertise, we value curiosity, rigor, collaboration, and a willingness to share knowledge within a multidisciplinary team.

• Profit-sharinganda companysavings plan.
• Public transport subscription covered at 50%.
• Annual sustainable mobility bonus for eco-friendly transport (e-bike, electric car).
• Fully covered health insurance (Alan).
• Referral program (€1,000 for a junior and €2,000 for an experienced candidate).
• Access to a nursery viachoisir-ma-creche or contribution to childcare expenses.
• Subsidy for gym membership and sports activities (Gymlib).
• Meal subsidies (Swile).

Localisationof theposition :Based at the IPVF campus inPalaiseau, within the Paris-Saclay research ecosystem.