The phrase "a coherence time" is correct and usable in written English.
It can be used in contexts related to physics, particularly in discussions about quantum mechanics or signal processing, where it refers to the time over which a system maintains its quantum state or coherence.
Example: "The coherence time of the quantum state is crucial for ensuring accurate measurements in our experiments."
Alternatives: "a coherence duration" or "a coherence interval".
Temporal coherence effects arise from the finite spectral width of the source radiation; a coherence time Δt can be defined as 1/Δν, in which Δν is the frequency bandwidth.
During a coherence time period, the stochastic values of the channel coefficients acting over each subcarrier are strongly correlated.
We assume a slowly varying flat fading Rayleigh channel with a coherence time larger than the symbol duration.
For the AoD information which includes the azimuth and elevation of the k-th user, changes very slowly and remains constant over a coherence time intervals.
In order to implement useful quantum computations, it will be necessary to have register qubits with as long a coherence time as possible.
The system operates under a hardware-calibrated time division duplexing (TDD) scheme over a wireless channel with a coherence time of T c seconds.
Such fading is extracted from a link level simulator, providing a channel coherence time of 10 ms. A transmitting node will decide how many antennas to use for transmitting different information (spatial multiplexing) over the whole bandwidth.
We consider a slow fading environment with a finite coherence time that is longer than the duration of the source phase and the relay phase, so that the fading gain between two network nodes takes the same value during both phases.
Recent results of experimental studies, using an amplified spontaneous emission (ASE) based CW pump source, with a selectable coherence time, confirm the trend observed numerically [1]: an optimum degree of partial pump coherence generates the broadest spanning continuum.
In practice, we assume the coherence properties of a non-stationary field to be piecewise constant over time, such that given prior information about the field at a particular time instant it can be assumed to be stationary within a single coherence time interval.
a The coherence time T c is defined as the time interval over which the process almost de-correlates in time.
