# Different Type Quantum Architecture
## Superconducting Loops:
- A resistance free current oscillates back and forth around a circuit loop. An injected microwve signal excites the current into super-position states.
- **Company Support:** Google , IBM , Quantum Circuit.
- **Qubits Available:**
- **Pros:**
- Fast.
- Built on existing semiconductor industry
- **Cons:**
- Collapse easily
- Extremely low temp required to work

## Trapped Ion:
- Electrically charged atom or ions, have quantum energies that depend on the location of the electron.Tuned laser cool and trap the ions and put them in superposition states.
- **Company Support:** ionQ
- **Pros:**
- Highly stable
- Can achieve high gate fidelities.
- **Cons:**
- Operation is slow.
- Many lasers are recquired for operation

## Silicon Quantum Dots
- These *artificial atom* are made by adding an electron to a small piece of pure silicon.Microwave control the electrons quantum states.
- **Company Support:** Intel
- **Pros:**
- Stable
- Build on existing semiconductor industry
- **Cons:**
- Entanglement is limited(Few in number).
- Low temp is recquired for operation.

## Topological Qubits:
- Quasiparticles can be seen in behaviour of electrons channeled through semi-conductor structures.Their braided path can encode quantum imformation.
- **Company Support:** Microsoft,Bell Labs
- **Pros:**
- Greatly reduce error.
- **Cons:**
- Still a very theoretical concept.

## Diamond Vaccancies:
- A nitrogen atom and a vaccancy add an electron to a diamond lattice. Its quantum spin state , along with those of nearby carbon nuclei , can be controlled with light.
- **Company Support:** Quantum Diamond Technologies
- **Pros:**
- Can be operated at room temp.
- **Cons:**
- Entanglement is hard to achieve.

## Neutral Atom
- Neutral atoms like ions store qubits within electronic state interaction through excitation to Ryberg State.
- **Company Support:** Atom Computing,QuEra
- **Pros:**
- The number of possible qubits is more.
- Both 2D and 3D Topography possible.
- **Cons:**
- Lasers are recquired.
- The physics is not well understood.
- Some atoms(used for computation) cn escape over time.

## Photonics
- Photonic Qubits interact via linear elements , using photons as a elementary particle for interaction.
- **Company Support:** Xanadu , PsiCorp
- **Pros:**
- Linear optical gates can be integrated on-chip.
- Capable of being scaled to much higher degree over time.
- **Cons:**
- No way of implementing memory to store information.
- Photon loss.