Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses

Abstract

We describe a fast quantum computer based on optically controlled electron spins in charged quantum dots that are coupled to microcavities. This scheme uses broad-band optical pulses to rotate electron spins and provide the clock signal to the system. Non-local two-qubit gates are performed by phase shifts induced by electron spins on laser pulses propagating along a shared waveguide. Numerical simulations of this scheme demonstrate high-fidelity single-qubit and two-qubit gates with operation times comparable to the inverse Zeeman frequency.

4 pages, 4 figures, introduction is clarified, the section on two-qubit gates was expanded and much more detail about gate fidelities is given, figures were modified, one figure replaced with a figure showing gate fidelities for relevant parameters

References in corpus (14)

• Quantum Computation with Quantum Dots
• Quantum state transfer and entanglement distribution among distant nodes in a quantum network
• Controlling the Spontaneous Emission Rate of Single Quantum Dots in a 2D Photonic Crystal
• Electron Spin Resonance Transistors for Quantum Computing in Silicon-Germanium Heterostructures
• Entanglement of Atomic Ensembles by Trapping Correlated Photon States
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• Quantum communication between atomic ensembles using coherent light
• Theory of control of spin/photon interface for quantum networks
• Quantum Computation by Communication
• Optical RKKY Interaction between Charged Semiconductor Quantum Dots
• Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
• Qubit Rotation by STIRAP
• Local Fault-tolerant Quantum Computation
• Coherent Population Trapping of Electron Spins in a Semiconductor

Cited by in corpus (27)

• Giant optical Faraday rotation induced by a single electron spin in a quantum dot: Applications to entangling remote spins via a single photon
• Observation of the dynamic Jahn-Teller effect in the excited states of nitrogen-vacancy centers in diamond
• Ultrafast optical control of entanglement between two quantum dot spins
• Layered architecture for quantum computing
• Universal quantum gates for hybrid systems assisted by quantum dots inside double-sided optical microcavities
• Quantum computing by optical control of electron spins
• Distributed Quantum Computation Architecture Using Semiconductor Nanophotonics
• Scalable photonic quantum computing assisted by quantum-dot spin in double-sided optical microcavity
• Fast spin rotations by optically controlled geometric phases in a quantum dot
• Ultrafast optical spin echo for electron spins in semiconductors
• Pulsed Nuclear Pumping and Spin Diffusion in a Single Charged Quantum Dot
• Complete Coherent Control of a Quantum Dot Strongly Coupled to a Nanocavity
• Ultrafast control of donor-bound electron spins with single detuned optical pulses
• Extended linear regime of cavity-QED enhanced optical circular birefringence induced by a charged quantum dot
• Lasing of donor-bound excitons in ZnSe microdisks
• Coherence properties of shallow donor qubits in ZnO
• Photon Antibunching and Magnetospectroscopy of a Single Fluorine Donor in ZnSe
• Spin-photon entanglement with direct photon emission in the telecom C-band
• Optically induced spin gates in coupled quantum dots using the electron-hole exchange interaction
• Optically controlled phase gate for two spin qubits in coupled quantum dots
• Suppression of Decoherence tied to Electron-Phonon Coupling in Telecom-Compatible Quantum Dots: Low-threshold Reappearance Regime for Quantum State Inversion
• Adiabatic optical entanglement between electron spins in separate quantum dots
• Solid-State Spin-Photon Quantum Interface without Spin-Orbit Coupling
• Nonadiabatic geometric rotation of electron spin in a quantum dot by 2Pi hyperbolic secant pulses
• Edge-state Fabry-Perot interferometer as a high sensitivity charge detector
• Purcell-enhanced lifetime modulation of quantum emitters as a probe of local refractive index changes
• The two-impurity Kondo model with spin-orbit interactions