| 摘要 |
A method for interaction-free entanglement of quantum bits in quantum computers, in which the quantum bits to be entangled are available in the state ψ44 with arbitrarily real phases φ and θ as an elementary quantum system. The two quantum bits (1) and (2) are localized in spatial regions (6) and (6′) and surrounded by switchable sheaths (7) and (7′) preferably a superconductor with the jump temperature TSU. The switchable sheaths, in the activated state, completely displace a global, homogeneous magnetic field Bz from the spatial regions (6) and (6′). In the inactivated state, the switchable sheaths do not shield the spatial regions (6) and (6′). If the switchable sheaths are switched from the activated state into the inactivated state while observing the boundary condition (R3), as a result of this, the two quantum bits (1) and (2) are transferred into the entangled state ψ. |
| 主权项 |
1. A method for interaction-free entanglement of two quantum bits in quantum computers, in which the quantum bits to be entangled are available in a state (ψ44) with arbitrarily real phases φ and θ as an elementary quantum system, comprising:
localizing the two quantum bits (1, 2) to be entangled in a first spatial region (6) and in a second spatial region (6′) surrounding the first and second spatial regions (6, 6′) by respectively one electrically switchable sheath (7, 7′), wherein the switchable sheaths, in the activated state, completely displace a global, homogeneous magnetic field Bz from the first and second spatial regions (6, 6′), wherein, in the inactivated state, the magnetic field Bz penetrates through the switchable sheaths and therefore also through the first and second spatial regions (6, 6′), and switching the switchable sheaths from the activated state into the inactivated state while observing a boundary condition (R3) and, as a result of this, transferring the two quantum bits (1, 2) into the entangled state (ψ−). |
