Energetic cost of measurements using quantum, coherent, and thermal light
arXiv:2203.01329 · doi:10.1103/PhysRevLett.128.220506
Abstract
Quantum measurements are basic operations that play a critical role in the study and application of quantum information. We study how the use of quantum, coherent, and classical thermal states of light in a circuit quantum electrodynamics setup impacts the performance of quantum measurements, by comparing their respective measurement backaction and measurement signal to noise ratio per photon. In the strong dispersive limit, we find that thermal light is capable of performing quantum measurements with comparable efficiency to coherent light, both being outperformed by single-photon light. We then analyze the thermodynamic cost of each measurement scheme. We show that single-photon light shows an advantage in terms of energy cost per information gain, reaching the fundamental thermodynamic cost.
arXiv comment15 pages, 7 figures
References in corpus (33)
- Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
- Circuit Quantum Electrodynamics
- A Quantum Engineer's Guide to Superconducting Qubits
- Introduction to Quantum Noise, Measurement and Amplification
- Measurement-based quantum computation
- Resolving photon number states in a superconducting circuit
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Fast Scalable State Measurement with Superconducting Qubits
- Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
- Minimal Energy Cost for Thermodynamic Information Processing: Measurement and Information Erasure
- Observing single quantum trajectories of a superconducting qubit
- Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits
- Quantum back-action of variable-strength measurement
- High-Fidelity Readout in Circuit Quantum Electrodynamics Using the Jaynes-Cummings Nonlinearity
- Observing a quantum Maxwell demon at work
- Extracting work from quantum measurement in Maxwell demon engines
- Quantum Heat Engines Using Superconducting Quantum Circuits
- Quantum non-demolition detection of an itinerant microwave photon
- Robust concurrent remote entanglement between two superconducting qubits
- Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
- Improved Superconducting Qubit Readout by Qubit-Induced Nonlinearities
- Ideal Projective Measurements Have Infinite Resource Costs
- Quantum work and the thermodynamic cost of quantum measurements
- Single-Shot Quantum Non-Demolition Detection of Itinerant Microwave Photons
- Detecting itinerant microwave photons with engineered non-linear dissipation
- Tuneable on-demand single-photon source
- Quantum measurement and the first law of thermodynamics: the energy cost of measurement is the work value of the acquired information
- Quantum dynamics of an electromagnetic mode that cannot contain N photons
- General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED
- Photon Statistics of Propagating Thermal Microwaves
- Multiplexed photon number measurement
- Sequential dispersive measurement of a superconducting qubit