Ambitious visionaries created the first startup companies in the fields of quantum computing and quantum networking in 1999. The community grew slowly at first, but since 2013 there has been an explosion of activity.

Hardware Companies

Of course, quantum computing is something of a sterile field if no one ever builds quantum computers that can execute quantum algorithms. Several startup companies are competing to provide the first quantum computing to be broadly adopted in the market.

The best known startup in the field is inarguably D-Wave, founded by Geordie Rose in 1999 in Vancouver. At the time, the fidelity and memory lifetime of superconducting qubits was poor, and various designs for coupling between superconducting qubits were just beginning to emerge. Gate-based, error-corrected systems remained far off. D-Wave chose to create adiabatic quantum computing systems, which operate on very different principles than those we have discussed in this course. The adiabatic model does not run Grover’s algorithm and Shor’s algorithm, but is instead focused on solving optimization problems that can be rewritten as a certain kind of graph problem. Their systems began with four qubits, but have grown to over a thousand as they have solved problems with manufacturing, the on-chip circuits necessary to control the qubits, and such seemingly mundane but critical issues as shielding the system from stray electrical and magnetic fields and keeping the device at nearly absolute zero temperature. We will discuss adiabatic systems a little more in one of the final articles in this course.

For a long time, D-Wave was the only startup company daring to try to deliver a complete computing system to customers, but a number of other small companies have sprung up to supply researchers with the equipment and services they need. For example, Oxford Instruments builds dilution refrigerators that use two isotopes of helium to create near-absolute zero temperatures, useful for both superconducting and quantum dot experiments. Cold Atom provides vacuum chambers suitable for ion trap experiments, and Advanced Quantum Technologies provides various forms of engineering support for building prototypes.

Over the last several years, researchers have begun to step out of their laboratories and create companies with the stated goal of delivering complete quantum computing systems to customers. In 2013, Chad Rigetti founded Rigetti Computing, which is building a superconducting system. Quantum Circuits, Inc. founded in 2015 by scientists from Yale University, is also working on superconducting systems of a somewhat different sort, and providing aincillary components along the way. Recently, our collaborator Jungsang Kim and his partner Chris Monroe have formed IonQ, which plans to deliver several ion traps optically connected to share entanglement, creating a more scalable system. Other embryonic companies include Psi Quantum and Xanadu, both working toward optical quantum computers, and Turing, Inc., focusing on NV diamond.

Software Companies

Of course, hardware is of little use without matching software, but programming systems that don’t yet exist requires a certain level of imagination. The startup companies Cambridge Quantum Computing Limited, QxBranch, 1QBit and QCWare are vying to accomplish this.

Some of these companies, rather than software packages, are providing software services. For a fee, they help companies determine which of their computationally intensive problems are suitable for solving using quantum computers, and if possible map some of them to run on the D-Wave machine or, in the short term, simulators of quantum computers in preparation for the advent of large machines. At least a half dozen consultancies have been founded, as well.

Quantum Networking Companies

In this course, we have not discussed quantum networking, but when talking about startup companies we would be remiss in not acknowledging the pioneering role played by quantum key distribution companies.

Quantum key distribution, which augments classical cryptography for communications, can be done using long-distance entanglement or single photons in superposition states. Creating long-distance entanglement has been a tremendous technological challenge, but creating single-photon states and detecting them has been feasible for a number of years.

In 1999, MagiQ Technologies was founded in New York. Two years later, id Quantique was founded in Geneva. After a lull of some years, they have recently been joined by Qubitekk, Quintessence Labs, and SeQureNet.

Besides the challenge of maintaining a high-fidelity quantum photonic state (whether polarization or time bin) over a long distance and detecting individual photons, these companies have been at the forefront in integrating their technology into large classical computing and network systems.

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This article is from the free online course:

Understanding Quantum Computers

Keio University