Senior Research Scientist — Quantum Memory

Job Title
:
Senior Research Scientist - Quantum Memory

Location
:
Hoboken, NJ

Division
:
Technology

Department
:
Engineering

QCi is an innovative, integrated photonics company that provides accessible and affordable quantum machines to the world today. Our devices operate at room temperature and low power, and are deployed today across high-performance computing, AI, cybersecurity, and remote sensing applications. We are extending that same integrated-photonics approach to quantum networking and quantum-secure communications, building chip-scale building blocks - sources, modulators, detectors, and now quantum memories - on a shared thin-film lithium niobate (TFLN) platform.

QCi is seeking a Senior Research Scientist to lead the development of a chip-integrated quantum memory based on erbium-doped thin-film lithium niobate (Er:TFLN). Erbium's optical transition falls directly in the telecom C-band, making it uniquely suited to interface with fiber networks and with QCi's existing TFLN photonic integrated circuits (PICs) including the lasers, electro-optic modulators, and single-photon detectors already in development on this platform.

You will build the simulation module and own the experiment setup on memory characterization through cryogenic characterization of storage and retrieval, to integration with QCi's photonic chips and quantum-networking systems. This is a hands-on research role for someone who wants to take a solid-state quantum memory from first coherence measurements to a deployable subsystem.

• Develop and optimize the light-matter interface between Er3+ ion ensembles and TFLN photonic structures for high-efficiency, low-noise photon storage and retrieval.
• Implement and benchmark on-chip quantum memory protocols (e.g., atomic frequency comb, spin-wave storage, EIT) and characterize storage efficiency, fidelity, and coherence times.
• Assemble and run cryogenic experiments (closed-cycle cryocoolers / dilution refrigerators) to measure spectral, hyperfine, and coherence properties of Er ions in TFLN, including the effect of applied magnetic and electric bias fields.
• Collaborate with QCi's photonic IC design and fabrication teams to co-design memory-compatible wave guides, ring resonators, and electro-optic tuning elements, and to align on process and packaging constraints.
• Model and simulate device performance - absorption, storage efficiency, added noise - using tools such as Lumerical, COMSOL, or custom Python/MATLAB code, and reconcile simulation with measurement.
• Integrate the quantum memory module with QCi's broader QKD and quantum-networking hardware (sources, modulators, single-photon detectors, timing electronics), supporting system-level test and validation from prototype to field-deployable hardware.
• Document methodologies and results, contribute to peer-reviewed publications and patent filings, and mentor junior scientists and engineers on the project.
• Represent QCi's quantum memory work with partners, funding agencies, and at technical conferences.
• Ph.D. in Physics, Applied Physics, Electrical Engineering, Optical Engineering, or a related field.
• 3+ years of hands-on experimental research in quantum optics, AMO physics, or solid-state quantum photonics beyond the Ph.D.
• Direct experience with rare-earth-doped solid-state systems (e.g., erbium, neodymium, praseodymium, ytterbium) for optical or quantum storage, or an equally strong quantum-optics background with a clear path into this area.
• Hands-on experience with cryogenic systems and low-temperature optical measurements.
• Experience designing for, or characterizing devices on, photonic integrated circuit platforms - thin-film lithium niobate strongly preferred.
• Strong grounding in…