Postdoctoral position in experimental continuous-variable quantum optics (M/F)

CNRS; France; Presencial; EUR 36.000 - 48.000; Jornada completa

Descripción de la vacante

CNRS's Laboratoire Kastler Brossel invites a postdoctoral researcher to join the Multimode Quantum Optics team. The role focuses on experimental work with optical parametric oscillators, telecom wavelengths, and quantum state characterization.

You will collaborate with PhD students and international researchers on cutting-edge quantum optics projects. The position is based at Laboratoire Kastler Brossel on the Sorbonne Université campus in Paris, offering an international environment and

Formación

• Strong background in quantum physics and multimode continuous-variable quantum optics.
• Experimental expertise in nonlinear optics and ability to carry out theoretical calculations and simulations.
• Experience with optical parametric amplification, especially in the multimode regime, and characterization of nonlinear photonic chips.

Responsabilidades

• Optimize multimode homodyne detection on the telecom setup.
• Study detection by parametric amplification with large bandwidth and low losses.
• Generate time-frequency cluster states.
• Perform post-selection by photon counting with SNSPDs.
• Characterize integrated parametric components (thin-film lithium niobate waveguides).
• Co-supervise PhD students, write papers and present results at conferences.

Conocimientos

Quantum physics

Multimode quantum optics

Nonlinear optics

Optical parametric amplification

Theoretical calculations and sims

Chip characterization

Teamwork

Initiative

Scientific integrity

Descripción del empleo

Organisation/Company CNRS Department Laboratoire Kastler Brossel Research Field Physics Researcher Profile First Stage Researcher (R1) Application Deadline 27 Oct 2026 - 23:59 (UTC) Country France Type of Contract Temporary Job Status Full-time Hours Per Week 35 Offer Starting Date 1 Jan 2027 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

The postdoctoral researcher will join the Multimode Quantum Optics team at Laboratoire Kastler Brossel. They will carry out experimental work on two setups. The first is based on an optical parametric oscillator in the near infrared. The second operates in single-pass configuration at telecom wavelengths. These setups are used to generate and characterize multimode quantum states, both Gaussian (squeezed states, cluster states) and non-Gaussian (photon subtraction or addition). They will also take part in supervising the team's PhD students.

• Optimize multimode homodyne detection on the telecom setup.
• Study detection by parametric amplification, an alternative to homodyne detection offering a large bandwidth and good tolerance to losses.
• Generate time-frequency cluster states.
• Perform post-selection by photon counting with superconducting nanowire single-photon detectors (SNSPDs).
• Characterize integrated parametric components (nonlinear thin-film lithium niobate waveguides).
• Co-supervise PhD students, write papers and present results at conferences.

The position is based at Laboratoire Kastler Brossel (Sorbonne Université, CNRS, ENS-PSL, Collège de France), on the Pierre et Marie Curie campus (towers 23-13, Paris 5th arrondissement). The postdoctoral researcher will work within the Multimode Quantum Optics team, alongside PhD students and permanent researchers, in an international environment. The team has national and international collaborations.

• Strong background in quantum physics and in multimode, continuous-variable quantum optics.
• Experimental expertise in nonlinear optics and ability to carry out theoretical calculations and simulations.
• Experience with optical parametric amplification, especially in the multimode regime, will be highly appreciated, as will experience in the characterization of nonlinear photonic chips (thin-film lithium niobate waveguides, measurement of squeezing and multimode quantum states). These skills will help evolve the setups towards all-optical measurement schemes and integrated platforms.
• Soft skills: teamwork, initiative, scientific integrity.