PODCAST · education
Quantum-optical phenomena in nanophysics
by Prof. Dr. Florian Marquardt
These lectures deal with the modern topic of quantum optical phenomena in nanophysics. During the past decade, a variety of solid state nanosystems have been realized which can be described using the concepts of quantum optics.
Episodes
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Quantum-optical phenomena in nanophysics - 27: Hybrid quantum systems
Foundations of Quantum Mechanics: Lecture 27 12.7.2013 9.2 The Casimir effect (note: chapter numbering in lecture is shifted); 9.3 Stochastic Electrodynamics Quantum hybrid systems. Nanomechanical resonator coupled to superconducting qubit. Cantilever coupled to cold atoms. Microwave resonator...
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Quantum-optical phenomena in nanophysics - 26: Nitrogen-vacancy centres in diamond
Foundations of Quantum Mechanics: Lecture 26 8.7.2013 8.3 Skyrmions; 9. Quantum electrodynamics; 9.1 Quantization of the field 4.2 Nitrogen vacancy centres in diamond. Basic structure and level scheme. Manipulation by microwaves and optical readout. Coupling to nuclear spins. Applications.
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Quantum-optical phenomena in nanophysics - 25: Excitons in quantum dots
Foundations of Quantum Mechanics: Lecture 25 6.7.2013 7.2 Berry phase; 8. Particle statistics; 8.1 Fermions and bosons; 8.2 Anyons 4. Quantum optics with single solid-state emitters 4.1 Excitons in self-assembled quantum dots. Quantum dots and excitons. Single-photon source and photon…
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Quantum-optical phenomena in nanophysics - 24: Optomechanics outlook
Foundations of Quantum Mechanics: Lecture 24 4.7.2013 7. Geometrical phases; 7.1 Aharonov-Bohm effect 3.9 Optomechanics outlook. Squeezed states (optical and mechanical). Entanglement light-mechanics. Test for new sources of decoherence, e.g. Penrose speculation about gravity-induced decoherence....
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Quantum-optical phenomena in nanophysics - 23: Quantum-limited displacement detection
Foundations of Quantum Mechanics: Lecture 23 28.6.2013 (continued) Gravitationally-induced decoherence; 6.3 Schrödinger-Newton equation; 6.4 Other models of gravitationally induced decoherence; 6.5 Modified commutator relations Quantum-limited displacement detection. Imprecision noise and...
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Quantum-optical phenomena in nanophysics - 22: Quantum optomechanics
Foundations of Quantum Mechanics: Lecture 22 27.6.2013 6. Extensions of Quantum Mechanics; 6.1 Spontaneous localization; 6.2 Gravitationally-induced decoherence 3.8 Quantum optomechanics. The Hamiltonian. Treating the laser drive in a rotating and displaced frame. Linearized optomechanical...
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Quantum-optical phenomena in nanophysics - 21: Nonlinear dynamics of optomechanical systems
Foundations of Quantum Mechanics: Lecture 21 24.6.2013 5.4 Hidden-variable theories: Can they be Lorentz-invariant?; 5.5 Many-worlds; 5.6 Consistent histories 3.7 Nonlinear dynamics of optomechanical systems. Instability towards self-induced oscillations. Conditions for stable limit cycle. Power...
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Quantum-optical phenomena in nanophysics - 20: Linear classical dynamics of optomechanical systems
Foundations of Quantum Mechanics: Lecture 20 20.6.2013 (continued) Nelsons Stochastic Quantization (deriving the Schrödinger equation from a condition on a drift-diffusion process, nonlocality) 3.5 Optomechanical equations of motion (classical limit). 3.6 Linearized dynamics. Effective...
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Quantum-optical phenomena in nanophysics - 19: Fluctuation spectra
Foundations of Quantum Mechanics: Lecture 19 17.6.2013 (continued) Bohms pilot wave theory (simulations of trajectories, nonlocal influences); 5.3 Nelsons Stochastic Quantization (drift and diffusion) T6. Fluctuation spectrum and fluctuation-dissipation theorem. Displacement spectrum....
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Quantum-optical phenomena in nanophysics - 18: Introduction to Optomechanics
Foundations of Quantum Mechanics: Lecture 18 14.6.2013 (continued) Schroedinger cats (optomechanics, superconducting rings, measures for the size of a Schroedinger cat); 5. Interpretations of Quantum Mechanics; 5.1 Kopenhagen interpretation; 5.2 Bohm s pilot wave theory 3. Optomechanics. 3.1...
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Quantum-optical phenomena in nanophysics - 17: Recent developments in circuit QED
Foundations of Quantum Mechanics: Lecture 17 13.6.2013 (continued) Quantum dynamics of open systems (path-integral approach, Feynman-Vernon influence functional); 4.4 Experimental examples of decoherence and open quantum systems (atoms, superconducting qubits, NV, etc.); 4.5 "Schrödinger cats"...
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Quantum-optical phenomena in nanophysics - 16: General theory of superconducting circuits
Foundations of Quantum Mechanics: Lecture 16 10.6.2013 (continued) noise spectrum; 4.3 Quantum dynamics of open systems (Kraus operators, Lindblad master equation, examples: two-level system relaxation and dephasing, damped harmonic oscillator) Continued with general theory of superconducting...
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Quantum-optical phenomena in nanophysics - 15: Creation and detection of arbitrary field states
Foundations of Quantum Mechanics: Lecture 15 7.6.2013 (continued) Basic examples of decoherence (spin, interference, beware of polaron physics); 4.2 Noise and decoherence (noise as a stochastic process, quantum noise spectrum) Wigner density detection via parity measurement. 2.8 Generating...
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Quantum-optical phenomena in nanophysics - 14: Quantum states of the field
T5. Quantum states of the field. Wigner density. Coherent states. Squeezed states. Squeezing operator. Quantum state tomography as a tool to measure the Wigner density. Foundations of Quantum Mechanics: Lecture 14 4.6.2013 3.5 Some foundational aspects of measurements: (A) Leggett-Garg...
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Quantum-optical phenomena in nanophysics - 13: Cavity grid and quantum error correction
Foundations of Quantum Mechanics: Lecture 13 31.5.2013 (continued) Weak measurements; 3.3 Observing Trajectories (including Standard Quantum Limit of displacement detection); 3.4 Examples of measurements (position, momentum, energy, charge) The cavity grid as a multi-qubit architecture in circuit...
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Quantum-optical phenomena in nanophysics - 12: Quantum information processing
Foundations of Quantum Mechanics: Lecture 12 27.5.2013 (continued) Weak measurements (including numerical quantum jump trajectories, Quantum Zeno effect, and decoherence vs. information gain); 2.7 Quantum information processing. Quantum computation, quantum simulation, and quantum communication....
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Quantum-optical phenomena in nanophysics - 11: Dissipative two-level dynamics
Foundations of Quantum Mechanics: Lecture 11 23.5.2013 (continued) Basic features of measurement (irreversibility, Everett picture of many branches); 3.2 Weak measurements More detailed derivation of Fermi Golden Rule rates expressed via quantum noise spectra [note: in contrast to the…
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Quantum-optical phenomena in nanophysics - 10: Lindblad master equations
Foundations of Quantum Mechanics: Lecture 10 17.5.2013 (continued) Entanglement; 3. The measurement process; 3.1 Basic features (Stern-Gerlach example, "quantum eraser", irreversibility, example of photon-detection in the human eye) (continued with Lindblad equations) Application to harmonic...
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Quantum-optical phenomena in nanophysics - 09: Dissipation in quantum systems
T4. Dissipation in quantum systems. Relaxation. Density matrix. Lindblad Markoff master equations. Application to relaxation in a two-level system. Application to harmonic oscillator.
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Quantum-optical phenomena in nanophysics - 08: Jaynes-Cummings model spectroscopy and dispersive qubit readout
Continued Jaynes-Cummings model. 2.5 Jaynes-Cummings model in circuit QED. Transmission spectroscopy and avoided crossing in the strong coupling regime. Dispersive regime for non-destructive qubit readout.
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Quantum-optical phenomena in nanophysics - 07: The Jaynes-Cummings model
2.4 The Jaynes-Cummings model - examples. T3. The Jaynes-Cummings model: solution. Level scheme. Resonant case.
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Quantum-optical phenomena in nanophysics - 06: Transmission line resonator
(2.3 continued) Quantizing the transmission line with periodic boundary conditions. Quantizing the transmission line resonator. Coupling to a Cooper-pair box.
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Quantum-optical phenomena in nanophysics - 05: Quantized electromagnetic field in the transmission line
(2.3 continued) Quantizing the transmission line with periodic boundary conditions. Quantizing the transmission line resonator. Coupling to a Cooper-pair box.
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Quantum-optical phenomena in nanophysics - 04: Classical waves in a transmission line
(2.2 continued) Energy level spectrum of the Cooper pair box, approximation as a two-level system 2.3 The microwave transmission line resonator: Cavities (optical, 3D microwave), waveguides, transmission lines, discretized circuit description of a transmission line, LC oscillator, wave equation,...
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Quantum-optical phenomena in nanophysics - 03: The superconducting charge qubit
Quantum electrodynamics in superconducting circuits 2.1 Some basics about superconductivity: zero resistance, Meissner-Ochsenfeld effect, critical magnetic field, Cooper pairs, the BCS gap 2.2 The Cooper pair box: tunneling between two islands, the charging energy, the tunneling term, external...
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Quantum-optical phenomena in nanophysics - 02: Basics of the two-level system
Many coupled oscillators and normal modes, T2. Basics of the two-level system: Pauli matrices, Bloch vector, free precession, avoided crossing in the energy spectrum, time-dependent driving (Rabi-oscillations)
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Quantum-optical phenomena in nanophysics - 01: Introduction
From ensembles to individual quantum systems, artificial quantum systems in nanophysics, field-matter interaction is based on oscillators (field) and two-level systems (atoms) T1. Basics of the harmonic oscillator: ladder operators, coherent states, coupling two oscillators, rotating wave...
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ABOUT THIS SHOW
These lectures deal with the modern topic of quantum optical phenomena in nanophysics. During the past decade, a variety of solid state nanosystems have been realized which can be described using the concepts of quantum optics.
HOSTED BY
Prof. Dr. Florian Marquardt
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