Systems, computer-implemented methods and/or computer program products are provided to facilitate operation of a quantum circuit on a set of qubits via providing and implementing decompositions of one or more unitary matrices. According to an embodiment, a system can implement a unitary matrix by providing and implementing a decomposition of the unitary matrix, to thereby facilitate operation of and/or operate a quantum circuit on a set of qubits. The system can comprise a memory that stores computer executable components and a processor that executes the computer executable components stored in the memory. The computer executable components can comprise a unitary matrix management component that decomposes a defined 4×4 unitary matrix into a defined circuit comprising a sequence of universal gates. The sequence of universal gates can be a same sequence for each defined 4×4 unitary matrix of a set of candidate 4×4 unitary matrices including the defined 4×4 unitary matrix.

Systems, computer-implemented methods and/or computer program products are provided for facilitating time management of a quantum program at one or more nodes of a system, such as a hybrid classical/quantum system. A system, such as a classic portion of the hybrid system, can comprise a memory that stores computer executable components and a processor that executes the computer executable components stored in the memory. The computer executable components can comprise a time management component that can communicate with a node to trigger the node to execute one or more quantum program instructions relative to a counter of the node that is advanced by the communicating. The time management component can advance the counter at the node based upon a combination of time of another node and of a determined actual propagation time for the communicating.

A method for reducing computation time while simulating quantum computation on a classical computer by performing an algorithm used to determine the most efficient input contraction, the method including receiving, by a processor, a tensor network representing a quantum circuit, computing, by the processor, an ordering for the tensor network by an ordering algorithm, contracting, by the processor, the tensor network by eliminating indices according to the ordering resulting in a contracted tensor network, and returning, by the processor, the contracted tensor network.

The driver Hamiltonian is modified in such a way that the quantum approximate optimization algorithm (QAOA) running on a circuit-model quantum computing facility (e.g., actual quantum computing device or simulator), may better solve combinatorial optimization problems than with the baseline/default choice of driver Hamiltonian. For example, the driver Hamiltonian may be chosen so that the overall Hamiltonian is non-stoquastic.

Systems and techniques that facilitate electronic generation of three-dimensional quantum circuit diagrams are provided. In various embodiments, a system can comprise a data component that can access qubit topology data characterizing a quantum computing device. In various aspects, the system can further comprise a rendering component that can render a three-dimensional quantum circuit diagram based on the qubit topology data. In various instances, the qubit topology data can indicate which qubits of the quantum computing device are coupled together. In various cases, the rendering component can render the three-dimensional quantum circuit diagram by generating a two-dimensional qubit configuration model of the quantum computing device based on which qubits of the quantum computing device are coupled together, by extruding one or more qubit lines three-dimensionally outward from the two-dimensional qubit configuration model, and by rendering one or more quantum gates on the one or more qubit lines.

Providing quantum file permissions is disclosed herein. In one example, a quantum computing device includes a permissions database that stores permissions information for a plurality of quantum files. A quantum file permissions service, executing on a processor device of the quantum computing device, receives from a requestor a permissions query for a permissions status (i.e., a read permission indicator, a write permission indicator, and/or an execute permission indicator, as non-limiting examples) of a quantum file including a plurality of qubits. In response, the quantum file permissions service accesses permissions information for the quantum file from the permissions database. The quantum file permissions service uses the permissions information from the permissions database to determine a permissions status of the quantum file. The quantum file permissions service then sends a response to the requestor indicating the permissions status of the quantum file.

It is determined that a first quantum process is to be initiated and will utilize a first quantity of qubits. Quantum computing system (QCS) metadata is accessed that identifies a plurality of QCSs and, for each respective QCS in the plurality of QCSs, a plurality of qubits implemented by the respective QCS. Based on the QCS metadata, a set of QCSs from the plurality of QCSs is selected to form a first distributed QCS. A set of qubits implemented by the QCSs in the set of QCSs is selected. Distributed QCS information is sent to each QCS in the set of QCSs, the distributed QCS information identifying one QCS in the set of QCSs as a primary QCS.

It is determined that a first quantum process is to be initiated and will utilize a first quantity of qubits. Quantum computing system (QCS) metadata is accessed that identifies a plurality of QCSs and, for each respective QCS in the plurality of QCSs, a plurality of qubits implemented by the respective QCS. Based on the QCS metadata, a set of QCSs from the plurality of QCSs is selected to form a first distributed QCS. A set of qubits implemented by the QCSs in the set of QCSs is selected. Distributed QCS information is sent to each QCS in the set of QCSs, the distributed QCS information identifying one QCS in the set of QCSs as a primary QCS.

A system comprises pulse generation and measurement circuitry comprising a plurality of pulse generator circuits and a plurality of ports, and management circuitry. The management circuitry is operable to analyze a specification of a controlled system and controlled elements that comprises a definition of a controlled element of the control system, and a definition of one or more pulses available for transmission by the control system. The management circuitry is operable to configure, based on the specification, the pulse generation and measurement circuitry to: generate the one or more pulses via one or more of the plurality of pulse generator circuits; and output the one or more pulses to the controlled element via one or more of the plurality of ports.

Methods, systems, and apparatus for solving computational tasks using quantum computing resources. In one aspect a method includes receiving, at a quantum formulation solver, data representing a computational task to be performed; deriving, by the quantum formulation solver, a formulation of the data representing the computational task that is formulated for a selected type of quantum computing resource; routing, by the quantum formulation solver, the formulation of the data representing the computational task to a quantum computing resource of the selected type to obtain data representing a solution to the computational task; generating, at the quantum formulation solver, output data including data representing a solution to the computational task; and receiving, at a broker, the output data and generating one or more actions to be taken based on the output data.