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1. 发明公开

US20240362514A1 Device and Method for Continuous Time Quantum Computing 审中-公开
公开(公告)号：US20240362514A1
公开(公告)日：2024-10-31
申请号：US18247456
申请日：2022-03-10
申请人： Michele Reilly , Seth Lloyd
发明人： Michele Reilly , Seth Lloyd
IPC分类号： G06N10/20 , G06N10/40
CPC分类号： G06N10/20 , G06N10/40
摘要： The present disclosure relates to quantum computing methods and devices, wherein a computation corresponding to a certain desired unitary transformation of the Hilbert space of a quantum system, such as a set of qubits, is implemented by selective application of control pulses in order realize a continuous time quantum computation rather than by decomposing the unitary transformation into a sequence of gates taken from a fixed set of gates. In this way an effective Hamiltonian having an input matrix A encoded as an off-diagonal block connecting a first and a second subspace of the quantum system is then applied alternatingly with some standard Hamiltonian in order to obtain a time evolution corresponding to a given function f applied to the input matrix A. The required control pulses are optimized by means of classical compression techniques such as a deep learning neural network, in order to maximize, during the information loading phase of the computation, the amount of classical information loaded into the system, and, during the computational phase, the number of elementary continuous time quantum transformations, respectively.

2. 发明申请

US20220317544A1 MULTIPLEXED SINGLE PHOTON SOURCE USING ONE-WAY SWITCHING ELEMENTS 有权
公开(公告)号：US20220317544A1
公开(公告)日：2022-10-06
申请号：US17708123
申请日：2022-03-30
申请人： Michele Reilly
发明人： Michele Reilly
IPC分类号： G02F1/39 , H04Q11/00 , H04B10/70
摘要： A multiplexed single photon source for quasi-deterministically generating single photons, wherein heralded random single photons generated by pulsed random single photon source are sent through a series of optical switches each having first and second input and output modes and each capable of being switched from a first state corresponding to a SWAP operation to a second state corresponding to an Identity operation on the mode space, whereby the first and second input and output modes of the switches are connected in series to form a first and second optical path respectively, and whereby a first output mode of a last optical switch forms the output mode of the multiplexed single photon source and a second output mode of the last optical switch is connected by a delay loop introducing a time delay Td to the second input mode of a first optical switch. It furthermore relates to a method of quasi-deterministically generating single photons with such a multiplexed single photon source, the method comprising initializing, before or at the start of a first cycle, the first switch in the first state and all subsequent switches in the second state; switching, when the generation of a random single photon is heralded, the first switch to the second state after that photon has been routed onto the closed optical path formed by the second optical path and the delay loop, thereby ensuring that the photon may loop around the closed optical path; and, switching, at the start of the Nth cycle, a last switch of the series of optical switches into the first state, thereby causing the photon to be routed out of the closed optical path and into the output mode of the multiplexed single photon source, such that the photon is output quasi-deterministically at a time N Td after the start of the first cycle.

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