Deterministic entanglement of ions in thermal states of motion
arXiv:0810.0670 · doi:10.1088/1367-2630/11/2/023002
Abstract
We give a detailed description of the implementation of a Molmer-Sorensen gate entangling two Ca+ ions using a bichromatic laser beam near-resonant with a quadrupole transition. By amplitude pulse shaping and compensation of AC-Stark shifts we achieve a fast gate operation without compromising the error rate. Subjecting different input states to concatenations of up to 21 individual gate operations reveals Bell state fidelities above 0.80. In principle, the entangling gate does not require ground state cooling of the ions as long as the Lamb-Dicke criterion is fulfilled. We present the first experimental evidence for this claim and create Bell states with a fidelity of 0.974(1) for ions in a thermal state of motion with a mean phonon number of <n>=20(2) in the mode coupling to the ions' internal states.
arXiv comment18 pages, 9 figures (author name spelling corrected)
References in corpus (24)
- The Physical Implementation of Quantum Computation
- Quantum Computing
- Quantum computation with ions in thermal motion
- Randomized Benchmarking of Quantum Gates
- Entanglement and quantum computation with ions in thermal motion
- Quantum dynamics of cold trapped ions, with application to quantum computation
- Towards fault-tolerant quantum computing with trapped ions
- Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
- Long-lived qubit memory using atomic ions
- 'Designer atoms' for quantum metrology
- High-fidelity readout of trapped-ion qubits
- Process tomography of ion trap quantum gates
- Sympathetic cooling of and for quantum logic
- Phase Control of Trapped Ion Quantum Gates
- Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor
- How to realize a universal quantum gate with trapped ions
- Ion trap quantum gates with amplitude-modulated laser beams
- Entanglement of Trapped-Ion Clock States
- Generation of many-particle entanglement in an ion trap by adiabatic ground-state transitions
- Sympathetic Cooling of Trapped Cd+ Isotopes
- Experimental quantum information processing with 43Ca+ ions
- Optimal control of entangling operations for trapped ion quantum computing
- Mesoscopic superpositions of vibronic collective states of N trapped ions
- Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+
Cited by in corpus (75)
- Trapped-Ion Quantum Computing: Progress and Challenges
- Quantum simulation of the Dirac equation
- Realization of a quantum walk with one and two trapped ions
- Ion-trap measurements of electric-field noise near surfaces
- State-independent experimental test of quantum contextuality
- A quantum information processor with trapped ions
- From transistor to trapped-ion computers for quantum chemistry
- Optimal metrology with programmable quantum sensors
- Optimal quantum control of multi-mode couplings between trapped ion qubits for scalable entanglement
- EIT ground-state cooling of long ion strings
- Colloquium: Trapped ions as quantum bits -- essential numerical tools
- Measurement-based quantum computation with trapped ions
- Designer Spin Pseudomolecule Implemented with Trapped Ions in a Magnetic Gradient
- Robust entanglement gates for trapped-ion qubits
- Normal modes of trapped ions in the presence of anharmonic trap potentials
- Coherent Error Suppression in Multi-Qubit Entangling Gates
- Compatibility and noncontextuality for sequential measurements
- Entanglement-enhanced detection of single-photon scattering events
- Phase-modulated entangling gates robust to static and time-varying errors
- Universal gate-set for trapped-ion qubits using a narrow linewidth diode laser
- Can different quantum state vectors correspond to the same physical state? An experimental test
- Chip-integrated voltage sources for control of trapped ions
- A bosonic Josephson junction controlled by a single trapped ion
- Keeping a Single Qubit Alive by Experimental Dynamic Decoupling
- Controlled long-range interactions between Rydberg atoms and ions
- Coherent Manipulation of a Ca Spin Qubit in a Micro Ion Trap
- Dissipative ground-state preparation of a spin chain by a structured environment
- High fidelity quantum gates of trapped ions mediated by a dissipative bus mode
- Fast dynamical decoupling of the Molmer-Sorensen entangling gate
- Dual-Species, Multi-Qubit Logic Primitives for Ca+/Sr+ Trapped-Ion Crystals
- Hexagonal Plaquette Spin-spin Interactions and Quantum Magnetism in a Two-dimensional Ion Crystal
- Observing the phase space trajectory of an entangled matter wave packet
- Trapped-ion quantum simulation of excitation transport: disordered, noisy, and long-range connected quantum networks
- Fault-tolerant multiqubit geometric entangling gates using photonic cat-state qubits
- Parametric longitudinal coupling between a high-impedance superconducting resonator and a semiconductor quantum dot singlet-triplet spin qubit
- Efficient construction of three- and four-qubit quantum gates by global entangling gates
- Composite two-qubit gates
- Quantum Information Scrambling: From Holography to Quantum Simulators
- Quantum Algorithmic Readout in Multi-Ion Clocks
- Quantum oscillator noise spectroscopy via displaced cat states
- High-Fidelity Hot Gates for Generic Spin-Resonator Systems
- Digital quantum simulation of a (1+1)D SU(2) lattice gauge theory with ion qudits
- Impact of Many-Body Correlations on the Dynamics of an Ion-Controlled Bosonic Josephson Junction
- Spin Dephasing as a Probe of Mode Temperature, Motional State Distributions, and Heating Rates in a 2D Ion Crystal
- High fidelity entanglement of 43Ca+ hyperfine clock states
- Detection of motional ground state population of a trapped ion using delayed pulses
- Fast gates for ion traps by splitting laser pulses
- Quantum Process Tomography of a Molmer-Sorensen Interaction
- Quantum control methods for robust entanglement of trapped ions
- Generation of a maximally entangled state using collective optical pumping
- Experimental Bayesian calibration of trapped ion entangling operations
- Trapped ion scaling with pulsed fast gates
- A high-fidelity method for a single-step -bit Toffoli gate in trapped ions
- Entangled states of trapped ions allow measuring the magnetic field gradient of a single atomic spin
- Transport-enabled entangling gate for trapped ions
- Laserless quantum gates for electric dipoles in thermal motion
- Entangling gates for trapped-ion quantum computation and quantum simulation
- Entanglement at the quantum phase transition in a harmonic lattice
- Probing phases of quantum matter with an ion-trap tensor-network quantum eigensolver
- Global Variational Quantum Circuits for Arbitrary Symmetric State Preparation
- vdW-corrected density functional study of electric field noise heating in ion traps caused by electrode surface adsorbates
- Interaction of a Laser with a Qubit in Thermal Motion and its Application to Robust and Efficient Readout
- Experimental characterization of quantum dynamics through many-body interactions
- Verifiable measurement-based quantum random sampling with trapped ions
- Ramp dynamics of phonons in an ion trap: entanglement generation and cooling
- Non-equilibrium phonon dynamics in trapped ion systems
- Modelling noise in global Molmer-Sorensen interactions applied to quantum approximate optimization
- Quantum logic spectroscopy with ions in thermal motion
- Quantum communication between trapped ions through a dissipative environment
- Multi-qubit Quantum Rabi Model and Multi-partite Entangled States in a Circuit QED System
- Realization and Calibration of Continuously Parameterized Two-Qubit Gates on a Trapped-Ion Quantum Processor
- Phonon-mediated quantum gates in trapped ions coupled to an ultracold atomic gas
- Trapped ions beyond carrier and sideband interactions
- Efficient quantum simulation of fermionic and bosonic models in trapped ions
- Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition