# Quantum companies in CA, United States Find quantum companies with an address in CA. Ask which modalities and services they supply. 12 quantum companies. Also on the [web page](https://quantumcompanies.fyi/us/ca). ## Quantum companies 1. [Freedom Photonics](https://quantumcompanies.fyi/us/ca/santa-barbara/freedom-photonics.md), Quantum components, 41 Aero Camino, Santa Barbara: Freedom Photonics, now part of Quantum Computing Inc., produces photonic solutions including diffraction-limited 1550 nm lasers, amplifiers, and fast… 2. [Longwave Photonics](https://quantumcompanies.fyi/us/ca/mountain-view/longwave-photonics.md), Quantum components, 958 San Leandro Ave Ste 300, Mountain View: LongWave Photonics provides terahertz Quantum Cascade Laser (QCL) systems for imaging, spectroscopy, and heterodyne receivers, offering milliwatt power levels… 3. [Nexus Photonics](https://quantumcompanies.fyi/us/ca/goleta/nexus-photonics.md), Quantum components, 6500 Hollister Ave Ste 150, Goleta: Develops single-chip photonic integrated circuits for quantum and emerging technologies, applying wafer-scale semiconductor manufacturing to enable production… 4. [QuintessenceLabs](https://quantumcompanies.fyi/us/ca/san-jose/quintessencelabs.md), Quantum networking and QKD, San Jose: Develops quantum-enhanced cybersecurity products including CV-QKD systems, a quantum true random number generator, key and policy management, and PQC readiness… 5. [Atom Computing](https://quantumcompanies.fyi/us/ca/berkeley/atom-computing.md), Quantum hardware, Berkeley: Builds highly scalable, gate-based quantum computers with arrays of optically trapped neutral atoms; AC1000 system offers 1,200+ fully-connected qubits;… 6. [Monarch Quantum](https://quantumcompanies.fyi/us/ca/san-diego/monarch-quantum.md), Quantum components, San Diego: Delivers Quantum Light Engines: integrated photonics hardware combining electronics, systems engineering and advanced manufacturing for quantum computing,… 7. [OEwaves](https://quantumcompanies.fyi/us/ca/pasadena/oewaves.md), Quantum components, Pasadena: Develops photonics products including narrow-linewidth lasers, noise analyzers and RF/mmWave/THz test systems; lists quantum technology, metrology and sensing… 8. [Photon Spot](https://quantumcompanies.fyi/us/ca/monrovia/photon-spot.md), Quantum components, Monrovia: Makes cryogenic systems reaching below 1 Kelvin without liquid helium and superconducting nanowire single-photon detectors; products used in NASA missions, by… 9. [Qolab](https://quantumcompanies.fyi/us/ca/goleta/qolab.md), Quantum hardware, Goleta: Quantum hardware company engineering industrial-grade superconducting QPUs, using wafer-scale integration and advanced semiconductor packaging to bond qubit… 10. [Quantum Computing Data](https://quantumcompanies.fyi/us/ca/san-rafael/quantum-computing-data.md), Quantum software and algorithms, San Rafael: Conducts research in high-performance quantum computation, developing scalable quantum simulation and benchmarking workflows on modern HPC and GPU… 11. [Rigetti Computing](https://quantumcompanies.fyi/us/ca/california/rigetti-computing.md), Quantum hardware, California: Builds quantum computers and quantum processing units, including the nine-qubit Novera system, using dilution-refrigerated hardware. 12. [Vector Atomic](https://quantumcompanies.fyi/us/ca/pleasanton/vector-atomic.md), Quantum sensing and metrology, Pleasanton: Engineers atomic clocks, inertial sensors and an atomic gravimeter for navigation and timing networks; rackmount optical atomic clocks validated versus… ## Cities in CA - [Goleta](https://quantumcompanies.fyi/us/ca/goleta.md): 2 quantum companies - [Berkeley](https://quantumcompanies.fyi/us/ca/berkeley.md): 1 quantum company - [California](https://quantumcompanies.fyi/us/ca/california.md): 1 quantum company - [Monrovia](https://quantumcompanies.fyi/us/ca/monrovia.md): 1 quantum company - [Mountain View](https://quantumcompanies.fyi/us/ca/mountain-view.md): 1 quantum company - [Pasadena](https://quantumcompanies.fyi/us/ca/pasadena.md): 1 quantum company - [Pleasanton](https://quantumcompanies.fyi/us/ca/pleasanton.md): 1 quantum company - [San Diego](https://quantumcompanies.fyi/us/ca/san-diego.md): 1 quantum company - [San Jose](https://quantumcompanies.fyi/us/ca/san-jose.md): 1 quantum company - [San Rafael](https://quantumcompanies.fyi/us/ca/san-rafael.md): 1 quantum company - [Santa Barbara](https://quantumcompanies.fyi/us/ca/santa-barbara.md): 1 quantum company ## Categories in CA - [Quantum components](https://quantumcompanies.fyi/category/quantum-components.md) - [Quantum hardware](https://quantumcompanies.fyi/category/quantum-hardware.md) - [Quantum sensing and metrology](https://quantumcompanies.fyi/category/quantum-sensing.md) - [Post-quantum cryptography vendors](https://quantumcompanies.fyi/category/post-quantum-cryptography.md) - [Quantum networking and QKD](https://quantumcompanies.fyi/category/quantum-networking.md) - [Quantum software and algorithms](https://quantumcompanies.fyi/category/quantum-software.md) ## Other states in United States - [CO](https://quantumcompanies.fyi/us/co.md): 11 quantum companies - [MA](https://quantumcompanies.fyi/us/ma.md): 4 quantum companies - [NY](https://quantumcompanies.fyi/us/ny.md): 4 quantum companies - [TX](https://quantumcompanies.fyi/us/tx.md): 3 quantum companies - [MT](https://quantumcompanies.fyi/us/mt.md): 2 quantum companies - [NJ](https://quantumcompanies.fyi/us/nj.md): 2 quantum companies - [AZ](https://quantumcompanies.fyi/us/az.md): 1 quantum company - [IL](https://quantumcompanies.fyi/us/il.md): 1 quantum company - [MD](https://quantumcompanies.fyi/us/md.md): 1 quantum company - [MI](https://quantumcompanies.fyi/us/mi.md): 1 quantum company - [MN](https://quantumcompanies.fyi/us/mn.md): 1 quantum company - [NH](https://quantumcompanies.fyi/us/nh.md): 1 quantum company - [TN](https://quantumcompanies.fyi/us/tn.md): 1 quantum company - [WY](https://quantumcompanies.fyi/us/wy.md): 1 quantum company