Adjustable transmission sub quantum bit system based on oxygen-free copper rectangular resonant cavity

A qubit and oxygen-free copper technology, applied in the field of adjustable transmission sub-qubit systems, can solve problems such as difficult to achieve multi-qubit coupling and strict control, and achieve the effect of reducing time and complexity

Active Publication Date: 2015-12-16
NANJING UNIV
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Problems solved by technology

Due to uncontrollable factors in sample preparation, it is difficult to strictly control the E of the sample J and E C , so the transmission sub-qubit composed of a single Josephson structure is difficult to realize the coupling between multiple qubits

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  • Adjustable transmission sub quantum bit system based on oxygen-free copper rectangular resonant cavity
  • Adjustable transmission sub quantum bit system based on oxygen-free copper rectangular resonant cavity
  • Adjustable transmission sub quantum bit system based on oxygen-free copper rectangular resonant cavity

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Embodiment approach

[0035] Such as figure 1 As shown, the tunable transport sub-qubit system based on the oxygen-free copper rectangular resonant cavity mainly includes: the tunable transport sub-qubit 1, the oxygen-free copper rectangular resonant cavity 2 equipped with superconducting coils, and the magnetic shield for shielding the external environmental magnetic field Barrel 3. The tunable transmission sub-qubit 1 is placed at the center of the oxygen-free copper rectangular resonator 2 to achieve maximum electromagnetic field coupling. Since the dc-SQUID is extremely susceptible to interference from external environmental magnetic fields, a low-temperature magnetic shielding tube 3 must be used to shield the external environmental magnetic fields.

[0036] Such as figure 2 As shown, the tunable transmission sub-qubit 1 is composed of a DC superconducting quantum interference device (dc-SQUID) 11 in the center and rectangular electrode dipole antennas 13 on both sides. dc-SQUID11 is a loo...

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Abstract

The invention discloses an adjustable transmission sub quantum bit system based on an oxygen-free copper rectangular resonant cavity. The system comprises an adjustable transmission sub quantum bit, the oxygen-free copper rectangular resonant cavity assembled with a superconducting coil and a low-temperature magnetic shielding cylinder for shielding the magnetic field of an external environment, wherein the adjustable transmission sub quantum bit is arranged in the center of the inner cavity of the oxygen-free copper rectangular resonant cavity and in the low-temperature magnetic shielding cylinder. The invention further discloses a method for measuring the energy spectrum of an adjustable transmission sub quantum bit based on an oxygen-free copper rectangular resonant cavity. The system and the method realize the transmission sub quantum bit with adjustable jump frequency, and are significant for multi-quantum bit coupling research and quantum control.

Description

technical field [0001] The invention proposes an adjustable transport sub-qubit system based on an oxygen-free copper rectangular resonant cavity, and provides a basic method for measuring the energy spectrum of the adjustable transport sub-qubit, involving qubit measurement and extremely weak signal detection, etc. field. Background technique [0002] Quantum computing is a hot spot in current scientific research, and superconducting quantum computing, as one of the solutions to realize quantum computing, has the advantages of compatibility with semiconductor manufacturing process and scalability, and has attracted widespread international attention. [0003] Superconducting qubits, as the basic unit of superconducting quantum computing, are mainly composed of Josephson structures. According to different manifestations of quantum states, they can be divided into three basic types: charge qubits, magnetic flux qubits, and phase qubits. In 2007, the Yale group proposed the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16
Inventor 周渝孙国柱范云益曹志敏潘佳政吴培亨
Owner NANJING UNIV
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