Counting statistics and detector properties of quantum point contacts

Abstract

Quantum detector properties of the quantum point contact (QPC) are analyzed for arbitrary electron transparency and coupling strength to the measured system and are shown to be determined by the electron counting statistics. Conditions of the quantum-limited operation of the QPC detector which prevent information loss through the scattering time and scattering phases are found for arbitrary coupling. We show that the phase information can be restored and used for the quantum-limited detection by inclusion of the QPC detector in the electronic Mach-Zehnder interferometer.

4 pages, 2 figures, published version

References in corpus (7)

• Coherent manipulation of electronic states in a double quantum dot
• An Electronic Mach-Zehnder Interferometer
• Few-Electron Quantum Dot Circuit with Integrated Charge Read-Out
• Manipulation of a single charge in a double quantum dot
• Two-particle Aharonov-Bohm effect and Entanglement in the electronic Hanbury Brown Twiss setup
• Quantum-Limited Measurement and Information in Mesoscopic Detectors
• Quantum Nondemolition Measurement of a Kicked Qubit

Cited by in corpus (60)

• Single-electron current sources: towards a refined definition of ampere
• Nonperturbative theory of weak pre- and post-selected measurements
• Current fluctuations in open quantum systems: Bridging the gap between quantum continuous measurements and full counting statistics
• Entanglement, Dephasing, and Phase Recovery via Cross-Correlation Measurements of Electrons
• Scattering matrix approach to the description of quantum electron transport
• Bidirectional Single-Electron Counting and the Fluctuation Theorem
• Leggett-Garg inequality with a kicked quantum pump
• Controlled Dephasing of Electrons by Non-Gaussian Shot Noise
• Qubit feedback and control with kicked quantum nondemolition measurements: A quantum Bayesian analysis
• Parity meter for charge qubits: an efficient quantum entangler
• Wave-packet Formalism of Full Counting Statistics
• Rapid Ballistic Readout for Flux Qubits
• Weak values of electron spin in a double quantum dot
• Coherence oscillations in dephasing by non-Gaussian shot noise
• Full Counting Statistics of Interacting Electrons
• An electronic Maxwell demon in the coherent strong-coupling regime
• Fast quantum limited read-out of a superconducting qubit using a slow oscillator
• The Leggett-Garg inequality in electron interferometers
• Parity detection and entanglement with a Mach-Zehnder interferometer
• The information about the state of a qubit gained by a weakly coupled detector
• Using Qubits to Measure Fidelity in Mesoscopic Systems
• Measuring Which-Path Information with Coupled Electronic Mach-Zehnder Interferometers
• On the validity and breakdown of the Onsager symmetry in mesoscopic conductors interacting with environments
• Counting Statistics and Dephasing Transition in an Electronic Mach-Zehnder Interferometer
• An Electronic Mach-Zehnder Quantum Eraser
• The influence of charge detection on counting statistics
• Quantum measurement characteristics of double-dot single electron transistor
• Model for monitoring of a charge qubit using a radio-frequency quantum point contact including experimental imperfections
• Dynamical Scheme for Interferometric Measurements of Full-Counting Statistics
• Universal detector efficiency of a mesoscopic capacitor
• Quantum Zeno stabilization in weak continuous measurement of two qubits
• Quantum dynamics in nonequilibrium environments
• Charge fluctuations in open chaotic cavities
• On-demand maximally entangled states with a parity meter and continuous feedback
• Quantum efficiency of binary-outcome detectors of solid-state qubits
• Non-equilibrium theory of charge qubit decoherence in the quantum point contact measurement
• Decoherence induced by electron accumulation in quantum measurement of charge qubits
• Weak Measurement of Qubit Oscillations with Strong Response Detectors: Violation of the Fundamental Bound Imposed on Linear Detectors
• Simultaneous readout of two charge qubits
• Reduced dynamics with renormalization in solid-state charge qubit measurement
• Non-Markovian dynamics and noise characteristics in continuous measurement of a solid-state charge qubit
• Energy-efficient quantum non-demolition measurement with a spin-photon interface
• Projective versus weak measurement of charge in a mesoscopic conductor
• Time correlators from deferred measurements
• Decoherence enhanced quantum measurement of a quantum dot spin qubit
• Heat pump driven by the shot noise of a tunnel contact
• Renormalized dynamics in charge qubit measurements by a single electron transistor
• Readout of solid-state charge qubits using a single-electron pump
• Sensing electrons during an adiabatic coherent transport passage
• Effect of interactions on quantum-limited detectors
• Counting statistics for mesoscopic conductors with internal degrees of freedom
• Theory of interaction-dependent instability in quantum detection by means of Luttinger liquid tunnel junction: a rigorous theorem
• Edge-state Fabry-Perot interferometer as a high sensitivity charge detector
• Quantum-limited charge detection with two quantum point contacts
• Phonon influence on the measurement of spin states in double quantum dots using the quantum point contact
• A Method to Detect Quantum Coherent Transport in Memristive Devices
• The effect of noise fluctuation of a quantum tunneling device coupled to a substrate
• Tunneling without tunneling: wavefunction reduction in a mesoscopic qubit
• Quantum Efficiency of Charge Qubit Measurements Using a Single Electron Transistor
• Ultimate charge sensitivity and efficiency of a quantum point contact with a superposed input state