公开(公告)号：US20020179937A1

公开(公告)日：2002-12-05

申请号：US09875776

申请日：2001-06-05

Applicant: D-Wave Systems, Inc.

Inventor： Zdravko Ivanov ,  Alexander Tzalentchuk ,  Jeremy P. Hilton ,  Alexander Maassen van de Brink

IPC: H01L031/0336

CPC classification number: G06N99/002 ,  B82Y10/00 ,  H01L39/225 ,  Y10S977/70 ,  Y10S977/812 ,  Y10S977/838 ,  Y10S977/933 ,  Y10S977/96

Abstract: Quantum computing systems and methods that use opposite magnetic moment states read the state of a qubit by applying current through the qubit and measuring a Hall effect voltage across the width of the current. For reading, the qubit is grounded to freeze the magnetic moment state, and the applied current is limited to pulses incapable of flipping the magnetic moment. Measurement of the Hall effect voltage can be achieved with an electrode system that is capacitively coupled to the qubit. An insulator or tunnel barrier isolates the electrode system from the qubit during quantum computing. The electrode system can include a pair of electrodes for each qubit. A readout control system uses a voltmeter or other measurement device that connects to the electrode system, a current source, and grounding circuits. For a multi-qubit system, selection logic can select which qubit or qubits are read.

Abstract translation: 使用相反磁矩状态的量子计算系统和方法通过在电流上施加电流并测量电流宽度上的霍尔效应电压来读取量子位的状态。 为了读取，量子位接地，以冻结磁矩状态，施加的电流限于不能翻转磁矩的脉冲。 可以通过电容耦合到量子位的电极系统来实现霍尔效应电压的测量。 绝缘体或隧道势垒在量子计算过程中将电极系统与量子位隔离。 电极系统可以包括用于每个量子位的一对电极。 读出控制系统使用连接到电极系统，电流源和接地电路的电压表或其它测量装置。 对于多量子位系统，选择逻辑可以选择读取哪个量子位或量子位。