Using a mesoscopic system to generate entanglement
AssigneeQuantum Valley Investment Fund LP
InventorsMaryam Sadat Mirkamali, David G. Cory
Life of this patent
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Abstract
In some aspects, a mesoscopic system is used to generate entanglement, for example, on a pair of qubits. In some implementations, the mesoscopic system includes a first spin, a second spin and multiple other spins. The initial state of the first and second spins can be separable (non-entangled) states. Measurement outcomes are obtained by performing projective measurements on the mesoscopic system. Based on the measurement outcomes, an entangled state of the first and second spins is detected. The entangled state is transferred from the first and second spins to the first and second qubits.
Claims19
A method of entangling qubits, the method comprising:
- preparing a mesoscopic system in an initial state, the mesoscopic system comprising a first spin, a second spin and other spins, the initial state comprising separable states of the first and second spins;
- after preparing the mesoscopic system in the initial state, obtaining measurement outcomes by performing projective measurements on the mesoscopic system, wherein performing the projective measurements causes the first and second spins to transition from the separable states to an entangled state;
- detecting, based on the measurement outcomes, that the first spin and the second spin are in the entangled state;
- and
- transferring the entangled state from the first spin and the second spin to a first qubit and a second qubit that are external to the mesoscopic system.
A system comprising:
- a mesoscopic system comprising a first spin, a second spin and other spins;
- first and second qubits, the first qubit coupled to the first spin by a first coupling, the second qubit coupled to the second spin by a second coupling;
- a measurement apparatus configured to entangle the first and second spins by performing projective measurements on the mesoscopic system;
- a control system configured to:
- prepare the mesoscopic system in an initial state that comprises separable states of the first and second spins;
- detect an entangled state of the first and second spins based on a series of measurement outcomes obtained by the measurement apparatus after the mesoscopic system has been prepared in the initial state;
- and
- transfer the entangled state from the first and second spins to the first and second qubits through the first and second couplings.
Dependencies are inferred from the claim text.