Rigetti & Co, LLC

Johannes Sebastian Otterbach

Marcus Palmer Da Silva

Nikolas Anton Tezak

Nicholas Charles Rubin

Christopher Mogan Wilson

Gavin Earl Crooks

Chad Tyler Rigetti

Matthew J Reagor

Robert Stanley Smith

Blake Robert Johnson

Jonathan Ward

In a general aspect, input data for a computer process are preprocessed by a preprocessor unit that includes a quantum processor. In some aspects, a preprocessor unit obtains input data for a computer process that is configured to run on a computer processing unit. Randomized parameter values are computed for variable parameters of a quantum logic circuit based on the input data. A classical processor in the preprocessor unit computes the randomized parameter values from the input data and a set of random numbers. A quantum processor in the preprocessor unit produces quantum processor output data by executing the quantum logic circuit having the randomized parameter values assigned to the variable parameters. Preprocessed data generated based on the quantum processor output data are then provided as the input for the computer process configured to run on the computer processing unit.

Using a quantum processor unit to preprocess data

In a general aspect, a plurality of distinct quantum processor unit (QPU) instances are utilized to execute a quantum computation. Hybrid classical-quantum computing methods and systems are described which utilize the plurality of QPU instances in the execution of quantum computations.

Utilizing multiple quantum processor unit (QPU) instances

In some embodiments, a computing system may comprise a memory for storing a ledger; a computer processor for verification of the ledger, wherein the computer processor comprises at least one of a classical computer processor configured to run a virtual quantum machine and a quantum computer comprising a plurality of qubits; wherein the ledger is configured to store arbitrary classical information and quantum information which is verifiable using the computer processor. Furthermore, in some embodiments the computing system is configured to perform operations comprising: adding to the ledger using the computer processor to solve a mathematically difficult problem which is Quantum-Merlin-Arthur-complete (QMA-complete). In embodiments, a blockchain includes a quantum state. In some aspects, a unitary operator corresponding to a quantum rotation is found when new transaction data are to be secured in the blockchain.

Quantum state blockchain

In a general aspect, values of input parameters for a quantum approximate optimization algorithm (QAOA) are selected by a Bayesian optimizer. The QAOA can be configured to solve a combinatorial optimization problem (COP), such as Maximum Cut. A hybrid classical-quantum computing system can be used to execute the QAOA and select the input parameters.

Selecting parameters for a quantum approximate optimization algorithm (QAOA)

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Oakland, CA, United States of America

Johannes Sebastian Otterbach