Quantum Electromechanics with Two Tone Drive
نویسندگان
چکیده
In the field of mechanics, it is a long standing goal to measure quantum behavior in ever larger and more massive objects. It may seem like an obvious conclusion now, but up until recently it was not clear whether a macroscopic mechanical resonator – built up from nearly 10 atoms – could be fully described as an ideal quantum harmonic oscillator. With recent advances in the fields of optoand electro-mechanics, such systems offer a unique advantage in probing the quantum noise properties of macroscopic electrical and mechanical devices, properties that ultimately stem from Heisenberg’s uncertainty relations. Given the rapid progress in device capabilities, landmark results of quantum optics are now being extended into the regime of macroscopic mechanics. The purpose of this dissertation is to describe three experiments – motional sideband asymmetry, back-action evasion (BAE) detection, and mechanical squeezing – that are directly related to the topic of measuring quantum noise with mechanical detection. These measurements all share three pertinent features: they explore quantum noise properties in a macroscopic electromechanical device driven by a minimum of two microwave drive tones, hence the title of this work: “Quantum electromechanics with two tone drive”. In the following, we will first introduce a quantum input-output framework that we use to model the electromechanical interaction and capture subtleties related to interpreting different microwave noise detection techniques. Next, we will discuss the fabrication and measurement details that we use to cool and probe these devices with coherent and incoherent microwave drive signals. Having developed our tools for signal modeling and detection, we explore the three-wave mixing interaction between the microwave and mechanical modes, whereby mechanical motion generates motional sidebands corresponding to up-down fre-
منابع مشابه
Time-Dependent Real-Space Renormalization Group Method
In this paper, using the tight-binding model, we extend the real-space renormalization group method to time-dependent Hamiltonians. We drive the time-dependent recursion relations for the renormalized tight-binding Hamiltonian by decimating selective sites of lattice iteratively. The formalism is then used for the calculation of the local density of electronic states for a one dimensional quant...
متن کاملMicrowave Electromechanics: Measuring and Manipulating the Quantum State of a Macroscopic Mechanical Oscillator
متن کامل
Fully microwave-tunable universal gates in superconducting qubits with linear couplings and fixed transition frequencies
A register of quantum bits with fixed transition frequencies and weakly coupled to one another through simple linear circuit elements is an experimentally minimal architecture for a small-scale superconducting quantum information processor. Presently, the known schemes for implementing two-qubit gates in this system require microwave signals having amplitudes and frequencies precisely tuned to ...
متن کاملA ug 2 00 5 Quantum nano - electromechanics with electrons , quasiparticles and Cooper pairs : effective bath descriptions and strong feedback effects
Using a quantum noise approach, we discuss the physics of both normal metal and superconducting single electron transistors (SET) coupled to mechanical resonators. Particular attention is paid to the regime where transport occurs via incoherent Cooper-pair tunneling (either via the Josephson quasiparticle (JQP) or double Josephson quasiparticle (DJQP) process). We show that, surprisingly, the b...
متن کاملQuantum nano - electromechanics with electrons , quasiparticles and Cooper pairs : effective bath descriptions and strong feedback effects
Using a quantum noise approach, we discuss the physics of both normal metal and superconducting single electron transistors (SET) coupled to mechanical resonators. Particular attention is paid to the regime where transport occurs via incoherent Cooper-pair tunneling (either via the Josephson quasiparticle (JQP) or double Josephson quasiparticle (DJQP) process). We show that, surprisingly, the b...
متن کامل