Scalable interconnected quantum architecture
View Patent ↗A quantum circuit includes a quantum signal unit. There is a first quantum chip comprising a plurality of qubit devices and bi-directionally coupled to the quantum signal unit. A first quantum entangling unit is bi-directionally coupled to the quantum signal unit and configured to generate an entanglement between a first and a second qubit device on the first quantum chip via the quantum signal unit.
1. A quantum circuit, comprising:
a quantum signal unit;
a first quantum chip comprising a plurality of qubit devices coupled to the quantum signal unit; and
a first quantum entangling unit coupled to the quantum signal unit and configured to generate an entanglement between a first and a second qubit device on the first quantum chip via the quantum signal unit.
2. The quantum circuit of claim 1 , further comprising a second quantum chip including a plurality of qubit devices, wherein:
the second quantum chip is coupled to the quantum signal unit; and
the first quantum entangling unit is configured to generate an entanglement between the first qubit device on the first quantum chip and a third qubit device on the second quantum chip, via the quantum signal unit.
3. The quantum circuit of claim 1 , wherein the first qubit device and the second qubit device of the first quantum chip are not coupled directly.
4. The quantum circuit of claim 1 , wherein the first quantum entangling unit comprises a Josephson mixer device.
5. The quantum circuit of claim 1 , wherein the first quantum entangling unit comprises a beam splitter device.
6. The quantum circuit of claim 1 , wherein the first quantum entangling unit comprises a superconducting transmission line.
7. The quantum circuit of claim 1 , wherein the first quantum entangling unit is on a same substrate as the quantum chip.
8. The quantum circuit of claim 1 , further comprising a second quantum signal unit bi-directionally coupled to the quantum chip.
9. The quantum circuit of claim 8 , further comprising:
a long-range input-output (I/O) port; and
a short-range I/O port coupled to the first quantum entangling unit.
10. The quantum circuit of claim 8 , wherein the first quantum chip, the first quantum entangling unit, and the quantum signal unit are separate components on a printed circuit board (PCB).
11. The quantum circuit of claim 10 , further comprising a second quantum chip bi-directionally coupled between the first quantum signal unit and the second quantum signal unit.
12. The quantum circuit of claim 8 , further comprising a second quantum chip bi-directionally coupled between the first quantum signal unit and the second quantum signal unit.
13. The quantum circuit of claim 12 , wherein:
the first quantum chip is in a first cryogenic refrigeration unit; and
the second quantum chip is in a second cryogenic refrigeration unit that is separate from the first cryogenic refrigeration unit.
14. A quantum circuit, comprising:
a quantum signal unit;
a first quantum chip comprising a plurality of qubit devices and coupled to the quantum signal unit;
a second quantum chip coupled to the first quantum signal unit;
a first quantum entangling unit coupled to the quantum signal unit;
a synthesizer unit bidirectionally coupled to the first quantum chip, the second quantum chip, and the first quantum signal unit; and
a classical processing unit coupled to the synthesizer unit and operative to control the first and second quantum chips.
15. The quantum circuit of claim 14 , wherein the second quantum chip, the synthesizer unit, first quantum signal unit, and the first quantum entangling unit are on a same printed circuit board (PCB).
16. The quantum circuit of claim 15 , wherein:
the PCB is vertically anchored in a cryogenic refrigeration unit; and
the classical processing unit is in a stage of the cryogenic refrigeration unit that is at a higher temperature than the first and second quantum chips.
17. The quantum circuit of claim 15 , further comprising:
a first auxiliary port coupled to the first quantum signal unit;
an amplification or detection unit coupled to an output of the first quantum signal unit; and
a second auxiliary port coupled to the amplification or detection unit.
18. The quantum circuit of claim 14 , wherein the first quantum entangling unit is configured to generate an entanglement between a first and a second qubit device on the first quantum chip.
19. The quantum circuit of claim 18 , wherein the first quantum entangling unit is configured to generate an entanglement between a third qubit device on the first quantum chip and a fourth qubit device on the second quantum chip.
20. The quantum circuit of claim 18 , wherein the first qubit device and the second qubit device of the first quantum chip are not directly coupled.