Quantum Computing
arXiv:1009.2267 · doi:10.1038/nature08812
Abstract
Quantum mechanics---the theory describing the fundamental workings of nature---is famously counterintuitive: it predicts that a particle can be in two places at the same time, and that two remote particles can be inextricably and instantaneously linked. These predictions have been the topic of intense metaphysical debate ever since the theory's inception early last century. However, supreme predictive power combined with direct experimental observation of some of these unusual phenomena leave little doubt as to its fundamental correctness. In fact, without quantum mechanics we could not explain the workings of a laser, nor indeed how a fridge magnet operates. Over the last several decades quantum information science has emerged to seek answers to the question: can we gain some advantage by storing, transmitting and processing information encoded in systems that exhibit these unique quantum properties? Today it is understood that the answer is yes. Many research groups around the world are working towards one of the most ambitious goals humankind has ever embarked upon: a quantum computer that promises to exponentially improve computational power for particular tasks. A number of physical systems, spanning much of modern physics, are being developed for this task---ranging from single particles of light to superconducting circuits---and it is not yet clear which, if any, will ultimately prove successful. Here we describe the latest developments for each of the leading approaches and explain what the major challenges are for the future.
26 pages, 7 figures, 291 references. Early draft of Nature 464, 45-53 (4 March 2010). Published version is more up-to-date and has several corrections, but is half the length with far fewer references
References in corpus (70)
- Non-Abelian Anyons and Topological Quantum Computation
- Quantum nature of a strongly-coupled single quantum dot-cavity system
- Single-shot read-out of an individual electron spin in a quantum dot
- Coupling Superconducting Qubits via a Cavity Bus
- Driven coherent oscillations of a single electron spin in a quantum dot
- Optical Quantum Computing
- Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
- Silica-on-Silicon Waveguide Quantum Circuits
- Spin qubits in graphene quantum dots
- Randomized Benchmarking of Quantum Gates
- Coherent control of a single electron spin with electric fields
- Resolving photon number states in a superconducting circuit
- Fault-tolerant quantum computation with high threshold in two dimensions
- Resource-efficient linear optical quantum computation
- Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- Quantum Teleportation Between Distant Matter Qubits
- Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
- Towards fault-tolerant quantum computing with trapped ions
- Climbing the Jaynes-Cummings Ladder and Observing its Sqrt(n) Nonlinearity in a Cavity QED System
- Controlling the spontaneous emission of a superconducting transmon qubit
- Shor's quantum factoring algorithm on a photonic chip
- A microfabricated surface-electrode ion trap for scalable quantum information processing
- Generating Single Microwave Photons in a Circuit
- Controlled exchange interaction between pairs of neutral atoms in an optical lattice
- Solid state quantum memory using the 31P nuclear spin
- Manipulating multi-photon entanglement in waveguide quantum circuits
- High-speed linear optics quantum computing using active feed-forward
- Stark shift control of single optical centers in diamond
- Experimental demonstration of Shor's algorithm with quantum entanglement
- One-Way Quantum Computing in the Optical Frequency Comb
- Single artificial-atom lasing
- Complete methods set for scalable ion trap quantum information processing
- Fast and robust two-qubit gates for scalable ion trap quantum computing
- Spin relaxation and decoherence of holes in quantum dots
- Coherent Population Trapping of Single Spins in Diamond Under Optical Excitation
- Symmetrised Characterisation of Noisy Quantum Processes
- Quenching Spin Decoherence in Diamond through Spin Bath Polarization
- Demonstration of Shor's quantum factoring algorithm using photonic qubits
- An avalanche-photodiode-based photon-number-resolving detector
- Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
- Trapped-ion quantum logic gates based on oscillating magnetic fields
- Simple proof of equivalence between adiabatic quantum computation and the circuit model
- Spin-echo of a single electron spin in a quantum dot
- Bang-bang control of fullerene qubits using ultra-fast phase gates
- Benchmarking quantum control methods on a 12-qubit system
- Controllable coupling of superconducting flux qubits
- Fabrication and Characterization of Two-Dimensional Photonic Crystal Microcavities in Nanocrystalline Diamond
- Universality of Uhrig dynamical decoupling for suppressing qubit pure dephasing and relaxation
- Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
- Microwave-Induced Cooling of a Superconducting Qubit
- Magnetism in SQUIDs at Millikelvin Temperatures
- Coherence Time of a Solid-State Nuclear Qubit
- Electrical detection of 31P spin quantum states
- Universal pulse sequence to minimize spin dephasing in the central spin decoherence problem
- High-fidelity gates in a Josephson qubit
- Local Fault-tolerant Quantum Computation
- Randomized benchmarking of single and multi-qubit control in liquid-state NMR quantum information processing
- Experimental quantum state tomography of a solid state qubit
- A spin based heat engine: demonstration of multiple rounds of algorithmic cooling
- Deterministic Ultracold Ion Source targeting the Heisenberg Limit
- The Photonic Module: an on-demand resource for photonic entanglement
- Fast nuclear spin hyperpolarization of phosphorus in silicon
- Deterministic optical quantum computer using photonic modules
- Simultaneous sub-second hyperpolarization of the nuclear and electron spins of phosphorus in silicon
- Threshold Error Penalty for Fault Tolerant Computation with Nearest Neighbour Communication
- Long-range spin-qubit interaction mediated by microcavity polaritons
- A gate-defined silicon quantum dot molecule
- Optical Detection of a Single Nuclear Spin
- Implementation of a Quantum Annealing Algorithm Using a Superconducting Circuit
Cited by in corpus (21)
- An Open-System Quantum Simulator with Trapped Ions
- Dissipative preparation of entanglement in optical cavities
- Simulating chemistry using quantum computers
- Robust dynamical decoupling for quantum computing and quantum memory
- Polarization entangled state measurement on a chip
- The negatively charged nitrogen-vacancy centre in diamond: the electronic solution
- Noiseless nonreciprocity in a parametric active device
- Multimode quantum interference of photons in multiport integrated devices
- Quantum Computing with NMR
- Adding control to arbitrary unknown quantum operations
- Femtosecond Coherence and Quantum Control of Single Molecules at Room Temperature
- Anomalous decoherence effect in a quantum bath
- Randomized benchmarking of atomic qubits in an optical lattice
- Quantum Correlations in non-Markovian Environments
- Semiconductor quantum ring as a solid-state spin qubit
- Photonic circuits for generating modal, spectral, and polarization entanglement
- Steady state entanglement of two coupled qubits
- Modal and Polarization Qubits in Ti:LiNbO Photonic Circuits for a Universal Quantum Logic Gate
- Measurement-induced quantum entanglement recovery
- Exact reduced dynamics for a qubit in a precessing magnetic field and in the contact with a heat-bath
- Automated Error Correction For Generalized Bell States