Remote entanglement via adiabatic passage using a tunably-dissipative quantum communication system
arXiv:2005.12334 · doi:10.1103/PhysRevLett.124.240502
Abstract
Effective quantum communication between remote quantum nodes requires high fidelity quantum state transfer and remote entanglement generation. Recent experiments have demonstrated that microwave photons, as well as phonons, can be used to couple superconducting qubits, with a fidelity limited primarily by loss in the communication channel. Adiabatic protocols can overcome channel loss by transferring quantum states without populating the lossy communication channel. Here we present a unique superconducting quantum communication system, comprising two superconducting qubits connected by a 0.73 m-long communication channel. Significantly, we can introduce large tunable loss to the channel, allowing exploration of different entanglement protocols in the presence of dissipation. When set for minimum loss in the channel, we demonstrate an adiabatic quantum state transfer protocol that achieves 99% transfer efficiency as well as the deterministic generation of entangled Bell states with a fidelity of 96%, all without populating the intervening communication channel, and competitive with a qubit-resonant mode-qubit relay method. We also explore the performance of the adiabatic protocol in the presence of significant channel loss, and show that the adiabatic protocol protects against loss in the channel, achieving higher state transfer and entanglement fidelities than the relay method.
27 pages, 14 figures
References in corpus (31)
- Charge insensitive qubit design derived from the Cooper pair box
- A High Phase-Space-Density Gas of Polar Molecules
- Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
- Heralded Generation of Ultrafast Single Photons in Pure Quantum States
- Shortcut to adiabatic passage in two and three level atoms
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
- Ultracold Dipolar Gas of Fermionic NaK Molecules in their Absolute Ground State
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Creation of ultracold RbCs molecules in the rovibrational ground state
- Quantum Gas of Deeply Bound Ground State Molecules
- Ultracold Molecules in the Ro-Vibrational Triplet Ground State
- Phonon-mediated quantum state transfer and remote qubit entanglement
- Observation of Quantum Effects in sub Kelvin Cold Reactions
- Coherent electronic transfer in quantum dot systems using adiabatic passage
- Quantum gates and multi-particle entanglement by Rydberg excitation blockade and adiabatic passage
- Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun
- Coherent optical transfer of Feshbach molecules to a lower vibrational state
- Experimental entanglement distillation of mesoscopic quantum states
- Coupling a Surface Acoustic Wave to an Electron Spin in diamond via a Dark State
- Combined 4-component and relativistic pseudopotential study of ThO for the electron electric dipole moment search
- Protecting a solid-state spin from decoherence using dressed spin states
- Isomer triggering via nuclear excitation by electron capture
- Quantum Engineering of a Low-Entropy Gas of Heteronuclear Bosonic Molecules in an Optical Lattice
- Efficient preparation and detection of microwave dressed-state qubits and qutrits with trapped ions
- Efficient coherent internal state transfer in trapped ions using Stimulated Raman Adiabatic Passage
- Compression of Atomic Phase Space Using an Asymmetric One-Way Barrier
- Optimal superadiabatic population transfer and gates by dynamical phase corrections
- Quantum Control in Qutrit Systems using Hybrid Rabi-STIRAP Pulses
- Decoherence-free preparation of Dicke states of trapped ions by collective stimulated Raman adiabatic passage
- Adiabatic quantum search with atoms in a cavity driven by lasers