Quantum Computers and Quantum Coherence

Abstract

If the states of spins in solids can be created, manipulated, and measured at the single-quantum level, an entirely new form of information processing, quantum computing, will be possible. We first give an overview of quantum information processing, showing that the famous Shor speedup of integer factoring is just one of a host of important applications for qubits, including cryptography, counterfeit protection, channel capacity enhancement, distributed computing, and others. We review our proposed spin-quantum dot architecture for a quantum computer, and we indicate a variety of first generation materials, optical, and electrical measurements which should be considered. We analyze the efficiency of a two-dot device as a transmitter of quantum information via the ballistic propagation of carriers in a Fermi sea.

13 pages, latex, one eps figure. Prepared for special issue of J. Mag. Magn. Matl., "Magnetism beyond 2000". Version 2: small revisions and corrections

References in corpus (15)

• Experimental quantum teleportation
• Quantum secret sharing
• Unconditional Security Of Quantum Key Distribution Over Arbitrarily Long Distances
• Dynamical suppression of decoherence in two-state quantum systems
• Coupled quantum dots as quantum gates
• How to share a quantum secret
• Quantum Nonlocality without Entanglement
• Quantum Games and Quantum Strategies
• Violation of Bell inequalities by photons more than 10 km apart
• Quantum strategies
• Deterministic entanglement of two trapped ions
• Complete quantum teleportation using nuclear magnetic resonance
• Quantum Gambling
• Quantum computing and single-qubit measurements using the spin filter effect
• Quantum Computers Speed Up Classical with Probability Zero

Cited by in corpus (56)

• Shot Noise in Mesoscopic Conductors
• The Physical Implementation of Quantum Computation
• Quantum Coherence in an Exchange-Coupled Dimer of Single-Molecule Magnets
• Probing Entanglement and Non-locality of Electrons in a Double-Dot via Transport and Noise
• Recipes for spin-based quantum computing
• Spintronics and Quantum Dots for Quantum Computing and Quantum Communication
• Superconductor coupled to two Luttinger liquids as an entangler for electron spins
• Spin interactions and switching in vertically tunnel-coupled quantum dots
• Rigorous Born Approximation and beyond for the Spin-Boson Model
• Operation of universal gates in a DXD superconducting solid state quantum computer
• Singlet fission for quantum information and quantum computing: The parallel JDE model
• Weak localization in ferromagnets with spin-orbit interaction
• Mesoscopic effects in adiabatic spin pumping
• Neutron Scattering and Magnetic Observables for S = 1/2 Molecular Magnets
• Parallel Quantum Computing in a Single Ensemble Quantum Computer
• The Hamiltonian of the V${}_{15}$ Spin System from first-principles Density-Functional Calculations
• Low-Temperature Decoherence of Qubit Coupled to Background Charges
• Performance of quantum batteries with correlated and uncorrelated chargers
• Electron Spins in Artificial Atoms and Molecules for Quantum Computing
• Lower bound for electron spin entanglement from beamsplitter current correlations
• Shot noise and spin-orbit coherent control of entangled and spin polarized electrons
• Anomalies in the NMR of Silicon: Unexpected Spin Echoes in a Dilute Dipolar Solid
• Testing Bell's Inequality with Ballistic Electrons in Semiconductors
• Time evolution and decoherence of a spin-1/2 particle coupled to a spin bath in thermal equilibrium
• The Intrinsic Origin of Spin Echoes in Dipolar Solids Generated by Strong Pi Pulses
• Localization effects in disordered quantum batteries
• All-Electrical Quantum Computation with Mobile Spin Qubits
• Spin bottleneck in resonant tunneling through double quantum dots with different Zeeman splittings
• Laser phase modulation approaches towards ensemble quantum computing
• Spintronics and Quantum Computing: Switching Mechanisms for Qubits
• Practical Verification of Quantum Properties in Quantum Approximate Optimization Runs
• Spin relaxation in diluted magnetic semiconductor quantum dots
• Crossed Andreev Re ection in Quantum Wires with Strong Spin-Orbit Interaction
• Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot
• High Fidelity Control of a Nitrogen-Vacancy Spin Qubit at Room Temperature using the SMART Protocol
• Exactly solvable model for the dynamics of two spin-1/2 particles embedded in separate spin star environments
• Entanglement enhancement induced by noise in inhomogeneously monitored systems
• Generalization of polarized spin excitations for asymmetric dimeric systems
• Exact Born Approximation for the Spin-Boson Model
• Fowler-Nordheim-like local injection of photoelectrons from a silicon tip
• Molecular Nanomagnet ${\text{Cu}}^{\text{II}}{\text{Ni}}^{\text{II}}{\text{Cu}}^{\text{II}}$ as Resource for Bipartite and Tripartite Quantum Entanglement and Coherence
• High temperature spin selectivity in a quantum dot qubit using reservoir spin accumulation
• Evaluation of Decoherence for Quantum Computing Architectures: Qubit System Subject to Time-Dependent Control
• Loading Bose condensed atoms into the ground state of an optical lattice
• Decoherence Effects in a Three-Level System under Gaussian Process
• Breakdown of Temporal Coherence in Photon Condensates
• On the partial trace over collective spin-degrees of freedom
• Nonlinear backreaction in a quantum mechanical SQUID
• On the Efficacy of Surface Codes in Compensating for Radiation Events in Superconducting Devices
• Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
• Quantum coherence in neutrino spin-flavor oscillations
• Aspects of the decoherence in high spin environments: Breakdown of the mean-field approximation
• Decay rates and decoherence of an interstitial two-level spin impurity in a ferromagnetic lattice
• Enhancing self-discharging process with disordered quantum batteries
• Small quantum dots of diluted magnetic III-V semiconductor compound
• Nonuniform Parafermion Chains: Low-Energy Physics and Finite-Size Effects