Quantum teleportation with continuous measurements
arXiv:1608.01814 · doi:10.1103/PhysRevA.94.042334
Abstract
We propose a scheme for quantum teleportation between two qubits, coupled sequentially to a cavity field. An implementation of the scheme is analyzed with superconducting qubits and a transmission line resonator, where measurements are restricted to continuous probing of the field leaking from the resonator rather than instantaneous projective Bell state measurement. We show that the past quantum state formalism [S. Gammelmark et al, Phys. Rev. 111, 160401] can be successfully applied to estimate what would have been the most likely Bell measurement outcome conditioned on our continuous signal record. This information determines which local operation on the target qubit yields the optimal teleportation fidelity. Our results emphasize the significance of applying a detailed analysis of quantum measurements in feed-forward protocols in non-ideal leaky quantum systems.
9 pages, 5 figures
References in corpus (11)
- Experimental quantum teleportation
- Charge insensitive qubit design derived from the Cooper pair box
- Quantum teleportation between light and matter
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- Unconditional quantum teleportation between distant solid-state qubits
- A widely tunable parametric amplifier based on a SQUID array resonator
- Entangling Independent Photons by Time Measurement
- Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
- A superconducting qubit with Purcell protection and tunable coupling
- Prediction and retrodiction for a continuously monitored superconducting qubit
- Teleportation in a noisy environment: a quantum trajectories approach