What's the difference between photonic and superconducting quantum computers?

[FinnHalliday]

I keep hearing about different types of quantum computers but nobody explains them in plain terms. What actually separates photonic quantum from superconducting quantum and which one is winning right now?

[Wizard]

Superconducting qubits use circuits cooled to near absolute zero. They manipulate quantum states using microwave pulses. The advantage is mature technology and established control methods. Downside is extreme cooling requirements cost complexity and error rates scale badly with qubit count

[Frost Hermit]

Photonic qubits use light particles. You encode information in properties of photons like polarization or orbital angular momentum. The huge advantage is room temperature operation. No cooling needed. But historically photonic systems had lower qubit counts and harder control problems

[StringTheory51]

Right now superconducting is winning in qubit count. IBM Google and others have built systems with hundreds of qubits. But photonic is advancing fast. Stanford and Monash just published major breakthroughs on room-temperature photonic devices. The race isn't decided

[IronQuarry98]

Think of it this way. Superconducting is like trying to balance a pencil on its point in a hurricane. You need everything perfect. Photonic is like manipulating individual photons which is hard but doesn't require extreme conditions

[DeanAmbrose11]

The real advantage of photonic emerges when you think about scaling. Cooling a million qubits to millikelvin is physically impossible. But photonic systems scale differently. That's why major labs are investing in photonic approaches despite superconducting being further along

[Anvil79]

Trapped ion qubits are a third approach that's underrated. Use individual ions trapped in electromagnetic fields. Between superconducting and photonic in terms of control complexity and temperature requirements. Some people think trapped ions will win long term

[NorthernKernel]

Photonic has another advantage nobody mentions. Light doesn't interact with itself easily. Superconducting qubits crosstalk to each other through the chip. Less crosstalk means fewer errors. That architectural advantage might matter at scale

[Arty Scout]

The beginner confusion comes from marketing. Every lab claims their approach is winning. Reality is we don't know yet. All three approaches have plausible paths to practical quantum advantage. The winner emerges through engineering execution not theoretical superiority

[Apogee Seb]

Majorana qubits are topological which is completely different from all three. Microsoft's bet. Uses exotic physics to protect quantum information. If topological protection works the error correction overhead drops enormously. Long shot but potentially game-changing

[Gareth19]

Current state mid-2026: superconducting leads on raw qubit count. Photonic catching up fast on integration and control. Trapped ions competitive in stability. Majorana still early stage. No clear winner. Every approach will probably coexist for years