Modular quantum system with discrete levels of connectivity
Devices and methods that facilitate modular quantum systems with discreet levels of connectivity are provided. In various embodiments, a quantum computing device can comprise one or more modules comprising at least qubits, buses, and readout structures; a plurality of couplers, wherein the plurality of couplers comprises at least two couplers selected from a group consisting of: classical couplers, short-range couplers, and long-range couplers, that are adapted for coupling a plurality of the at least qubits, buses, and readout structures; and a connection from the one or more modules to one or more classical controllers external to a cryogenic environment comprising the one or more modules.
1 . A quantum computing device comprising:
one or more modules comprising at least qubits, buses, and readout structures;
a plurality of couplers, wherein the plurality of couplers comprises at least two couplers selected from a group consisting of: classical couplers, short-range couplers, and long-range couplers, that are adapted for coupling a plurality of the at least qubits, buses, and readout structures, wherein the classical couplers refer to a classical computation unit employable to couple the plurality of the at least qubits, buses, and readout structures, and wherein respective short-range couplers and respective long-range couplers represent respective physical connections employable to couple the plurality of the at least qubits, buses, and readout structures; and
a connection from the one or more modules to at least two classical controllers external to a cryogenic environment comprising the one or more modules.
2 . The quantum computing device of claim 1 , wherein a bus external to the cryogenic environment and running between the at least two classical controllers is adapted to carry classical information between the at least two classical controllers.
3 . The quantum computing device of claim 2 , wherein the bus is adapted to carry the classical information in a time less than a coherence time (T 1 ) of qubits.
4 . The quantum computing device of claim 1 , wherein connections between at least two consecutive modules of the one or more modules are less than a defined length to create a longitudinal or transverse coupling between qubits on edges of modules.
5 . The quantum computing device of claim 1 , wherein qubits comprised within the at least qubits, buses, and readout structures extend a qubit lattice between at least two modules of the one or more modules.
6 . The quantum computing device of claim 1 , wherein the short-range couplers are characterized as being shorter than a defined length, and wherein the short-range couplers are characterized as having a defined number of channels between at least two connected modules of the one or more modules.
7 . The quantum computing device of claim 1 , wherein the classical couplers are adapted to provide classical parallelization between individual modules of the one or more modules by connecting to the individual modules.
8 . The quantum computing device of claim 1 , wherein the long-range couplers are characterized as being longer than a defined length, and wherein individual modules of the one or more modules are respectively disposed on separate and distinct substrates.
9 . The quantum computing device of claim 1 , wherein a combination of the classical couplers and the short-range couplers and a combination of the classical couplers and the long-range couplers allow synchronization of classical and quantum information between at least two modules of the one or more modules.
10 . A method, comprising:
coupling a plurality of at least qubits, buses, and readout structures using a plurality of couplers, wherein the plurality of couplers comprises at least two couplers selected from a group consisting of: classical couplers, short-range couplers, and long-range couplers, wherein the plurality of at least qubits, buses and readout structures are comprised by one or more modules, wherein the classical couplers refer to a classical computation unit employable to couple the plurality of at least qubits, buses, and readout structures, and wherein respective short-range couplers and respective long-range couplers represent respective physical connections employable to couple the plurality of at least qubits, buses, and readout structures.
11 . The method of claim 10 , further comprising:
creating a longitudinal or transverse coupling between qubits on edges of modules using connections between at least two consecutive modules of the one or more modules, wherein the connections are less than a defined length.
12 . The method of claim 11 , wherein qubits comprised within the plurality of at least qubits, buses, and readout structures extend a qubit lattice between at least two modules of the one or more modules.
13 . The method of claim 10 , wherein the short-range couplers are characterized as being shorter than a defined length.
14 . The method of claim 10 , wherein the short-range couplers are characterized as having a defined number of channels between at least two connected modules of the one or more modules.
15 . The method of claim 10 , wherein the classical couplers are adapted to provide classical parallelization between individual modules of the one or more modules by connecting to the individual modules.
16 . The method of claim 10 , wherein the long-range couplers are characterized as being longer than a defined length.
17 . The method of claim 10 , wherein individual modules of the one or more modules are respectively disposed on separate and distinct substrates.
18 . A quantum computing device, comprising:
one or more modules comprising at least qubits, buses, and readout structures;
a plurality of couplers, wherein the plurality of couplers comprises at least two couplers selected from a group consisting of: classical couplers, short-range couplers, and long-range couplers, that are adapted for coupling a plurality of the at least qubits, buses, and readout structures, wherein the classical couplers refer to a classical computation unit employable to couple the plurality of the at least qubits, buses, and readout structures, and wherein respective short-range couplers and respective long-range couplers represent respective physical connections employable to couple the plurality of the at least qubits, buses, and readout structures; and
a connection from the one or more modules to a classical controller external to a cryogenic environment comprising the one or more modules.
19 . The quantum computing device of claim 18 , wherein the classical controller measures a state of a qubit on a first module of the one or more modules.
20 . The quantum computing device of claim 19 , wherein based on a measurement of the state of the qubit, the classical controller conditionally performs one or more operations on a second module of the one or more modules, via a bus external to the cryogenic environment.