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Mechanism recovering classical behavior from a quantum system
techniques such as MRI and NMR, dephasing can lead to decreased signal strength or image intensity. In quantum information, dephasing in a quantum processor can
Dephasing
Response of spin to electromagnetic radiation
leads to an irreversible loss of magnetisation. But the inhomogeneous dephasing can be removed by applying a 180° inversion pulse that inverts the magnetisation
Spin_echo
Loss of quantum coherence
sequence: CPMG is an extension of SE. It applies a series of π-pulses. Dephasing Dephasing rate SP formula Einselection Ghirardi–Rimini–Weber theory H. Dieter
Quantum_decoherence
Solid-state electronics based on electron spin
population can be broadly classified as spin-flip scattering and spin dephasing. Spin-flip scattering is a process inside a solid that does not conserve
Spintronics
Formula in condensed matter physics
disorder. In order to derive the dephasing rate formula from first principles, a purity-based definition of the dephasing factor can be adopted. The purity
Dephasing_rate_SP_formula
Formula for solid emission and absorption
excitation-induced dephasing, can be included microscopically to the Wannier solver, which removes the need to introduce phenomenological dephasing constant, energy
Elliott_formula
Computer hardware technology that uses quantum mechanics
transverse relaxation time T2 (for NMR and MRI technology, also called the dephasing time), typically range between nanoseconds and seconds at low temperatures
Quantum_computing
Spectroscopic technique based on change of nuclear spin state
[citation needed] A Hahn echo decay experiment can be used to measure the dephasing time, as shown in the animation. The size of the echo is recorded for
Nuclear_magnetic_resonance
Light emission from substances after they absorb photons
polarization dephases typically on a sub-100 fs time-scale in case of nonresonant excitation due to ultra-fast Coulomb- and phonon-scattering. The dephasing of
Photoluminescence
Mathematical model
The analysis of dephasing can be extended to the low temperature regime by using a semiclassical strategy. In this context the dephasing rate SP formula
Dissipation model for extended environment
Dissipation_model_for_extended_environment
Subspace of a quantum system's Hilbert space that is invariant to non-unitary dynamics
with dephasing. Duan and Guo furthered this idea of combining two qubits to preserve coherence against dephasing, to both collective dephasing and dissipation
Decoherence-free_subspaces
Describe the optical response of semiconductors
f_{\mathbf {k} }^{h}} toward Fermi–Dirac distribution, excitation-induced dephasing, and further renormalization of energies due to correlations. All these
Semiconductor_Bloch_equations
Markovian quantum master equation for density matrices (mixed states)
Additional Lindblad operators can be included to model various forms of dephasing and vibrational relaxation. These methods have been incorporated into
Lindbladian
Photoexciation and similar effects
electromagnetic pulse is switched off. Due to this decay which is called dephasing, coherent effects are observable only for a certain temporal duration
Coherent effects in semiconductor optics
Coherent_effects_in_semiconductor_optics
Basic unit of quantum information
implementations are affected by noise. The so-called T1 lifetime and T2 dephasing time are a time to characterize the physical implementation and represent
Qubit
Superconducting qubit implementation
offset charge n g {\displaystyle n_{g}} across the junction; thus the dephasing time of the qubit is prolonged. The disadvantage is the reduced anharmonicity
Transmon
Pulse sequence during a medical test
"static dephasing". T2* is a measure of the loss of coherence in an ensemble of spins that includes all interactions (including static dephasing). T2 is
MRI_pulse_sequence
narrowing manifests in a peculiar temperature dependence of spin dephasing: The dephasing becomes slower at higher sample temperature where the exciton velocity
Motional_narrowing
Quantum state, of opposed conditions
linear memory is only subject to photon loss errors, it also experiences dephasing once coupled to a non-linear ancillary system. Bosonic codes draw their
Cat_state
Intereference effect in quantum optics
usually collisions. In solids, dephasing is due to interaction of the electronic states with the host lattice. The dephasing of state | 3 ⟩ {\displaystyle
Electromagnetically induced transparency
Electromagnetically_induced_transparency
Control technique for improving qubit coherence in quantum computing
but its principle is general. It is designed to reverse the effects of dephasing caused by slow or static inhomogeneities in the environment. The process
Dynamical_decoupling
Physics of many interacting particles
the use of the Green–Kubo relations, with the inclusion of stochastic dephasing by interactions between various electrons by use of the Keldysh method
Statistical_mechanics
Magnetic phenomenon
Rather, it is observed due to the interactions of an ensemble of spins dephasing from each other. Unlike spin-lattice relaxation, considering spin-spin
Spin–spin_relaxation
Model of quantum optics
- Cavity decay Atomic decay Atomic dephasing Collective decay Lindbladian L = a {\displaystyle L=a} L = σ i − {\displaystyle L=\sigma _{i}^{-}} L = σ
Dicke_model
Dissipation in quantum systems
can not describe dephasing unless a subsystem is chosen and the reduced density matrix of this open quantum system is analyzed. Dephasing leads to quantum
Quantum_dissipation
Neutron scattering technique
(rephasing). In NMR the dephasing happens due to variation in the local fields at positions of the nuclei, in NSE the dephasing is due to different neutron
Neutron_spin_echo
Type of neuroimaging
magnetic resonance experiments, this "relaxation" dominates. This results in dephasing. However, decoherence because of magnetic field inhomogeneity is not a
T2*-weighted_imaging
Emission spectrum with Lorentzian profile
Macfarlane, R. M. (2003). "Temperature and concentration dependence of optical dephasing, spectral-hole lifetime, and anisotropic absorption in Eu3+:Y2SiO5". Physical
Spectral_broadening
Process in quantum computing
errors. Together, amplitude damping and coherent evolution contribute to dephasing, one of the dominant noise processes in most qubit implementations. As
Quantum_error_correction
Point defect in diamonds
Matthew; Nakamura, Kazuo; Sumiya, Hitoshi (2026-03-12). "Unraveling quantum dephasing of nitrogen-vacancy center ensembles in diamond". npj Quantum Materials
Nitrogen-vacancy_center
homogeneous magnetic field, which results in slower transverse magnetization dephasing and a longer T2*. Conversely, hydration water molecules are mechanically
Magnetization_transfer
Vibration analysis of rotating machinery
for rolling element bearings consists of the following steps: First, a Dephasing step is utilized to filter out synchronous vibrations, such as those from
Condition-based maintenance of rotating machinery by vibration analysis
Condition-based_maintenance_of_rotating_machinery_by_vibration_analysis
Biomedical imaging technology
the standard cardiac planes used for assessment. Turbulent flow causes dephasing and signal loss allowing valvular disease to be qualitatively appreciated
Cardiac magnetic resonance imaging
Cardiac_magnetic_resonance_imaging
Application of quantum mechanics and chemistry to biology
PMID 19045332. S2CID 938902. Plenio, M. B.; Huelga, S. F. (2008-11-01). "Dephasing-assisted transport: quantum networks and biomolecules – IOPscience". New
Quantum_biology
Quantum measurement phenomenon
where measurement errors lead to fluctuations in the on-site energies, dephasing the system." https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch
Quantum_Zeno_effect
Networks connecting quantum processors
optical fiber/environment) and operation errors (such as depolarization, dephasing etc.). While redundancy can be used to detect and correct classical errors
Quantum_network
Model for quantum noise in quantum systems
matrices, Φ λ ( n ) {\displaystyle \Phi _{\lambda }^{(n)}} 's are some dephasing channels and ρ {\displaystyle \rho } is an arbitrary input state. Therefore
Quantum_depolarizing_channel
Means of studying the interaction of light and matter
which manifests as fluctuations in the gate voltage and leads to rapid dephasing. This fundamental limitation motivated the development of more sophisticated
Circuit quantum electrodynamics
Circuit_quantum_electrodynamics
Low-Field MRI
returning signal. In addition to T1 recovery, protons also undergo transverse dephasing, described by the T2 relaxation time. After excitation, the spins precess
Low-field magnetic resonance imaging
Low-field_magnetic_resonance_imaging
Quantum computing implementation
relaxation and exponentially (first-order) protected to first order against dephasing due to charge (flux) noise. This ideal behavior, however, is not always
Superconducting quantum computing
Superconducting_quantum_computing
Technique to study materials that have unpaired electrons
experiments. A Hahn echo decay experiment can be used to measure the dephasing time, as shown in the animation below. The size of the echo is recorded
Electron paramagnetic resonance
Electron_paramagnetic_resonance
Superconducting qubit architecture
Schwartz, Mollie E.; Oliver, William D.; Serniak, Kyle (2024-08-27). "Dephasing in Fluxonium Qubits from Coherent Quantum Phase Slips". PRX Quantum. 5
Fluxonium
observes the screening of the Coulomb interaction, excitation-induced dephasing, and excitation-induced energy shifts. All these aspects are important
Wannier_equation
Magnetic resonance imaging sequence
gradient switching and shaping. The refocusing mechanism fails if intravoxel dephasing exceeds over ±180º manifest by band-like artifacts. During the last decade
Steady-state free precession imaging
Steady-state_free_precession_imaging
Single-molecule sequencing technology
more expensive second-generation DNA sequencing alternatives. No dephasing: Dephasing of the DNA strands due to loss in synchronicity during synthesis
Transmission electron microscopy DNA sequencing
Transmission_electron_microscopy_DNA_sequencing
is used extensively for two purposes, either rephasing (selection) or dephasing (elimination) of a particular magnetization transfer pathway. It includes
Gradient enhanced NMR spectroscopy
Gradient_enhanced_NMR_spectroscopy
Medical imaging technique
({\vec {x}})} corrected for the effects of T1 preparation, T2 decay, dephasing due to field inhomogeneity, flow, diffusion, etc. and any other phenomena
Physics of magnetic resonance imaging
Physics_of_magnetic_resonance_imaging
Type of magnetic resonance imaging
NMR signal behavior in magnetically inhomogeneous tissues: The static dephasing regime". Magnetic Resonance in Medicine. 32 (6): 749–763. doi:10.1002/mrm
Blood-oxygenation-level–dependent imaging
Blood-oxygenation-level–dependent_imaging
Markovian master equation of a quantum system weakly coupled to its environment
{\displaystyle {\mathcal {R}}_{abab}} , the pure dephasing of the element ρ a b ( t ) {\displaystyle \rho _{ab}(t)} (dephasing of coherence). The interaction picture
Redfield_equation
Signal-processing operation
oscillations. Toward the end, subtle ion collisions add up to cause noticeable dephasing. This presents a problem for the Fourier transform, as it averages the
Apodization
Specialized technique associated with MRI
PMC 7179569. PMID 30919510. Landheer, Karl; Juchem, Christoph (April 2019). "Dephasing optimization through coherence order pathway selection (DOTCOPS) for improved
In vivo magnetic resonance spectroscopy
In_vivo_magnetic_resonance_spectroscopy
Decay of nuclear spin polarization in MRI and NMR
magnetic resonance experiments, this "relaxation" dominates. This results in dephasing. However, decoherence because of magnetic field inhomogeneity is not a
Relaxation_(NMR)
Group of techniques based on MRI to image blood vessels
different magnetized proton spins to lose phase coherence (intra-voxel dephasing phenomenon), resulting in a loss of signal. This phenomenon may result
Magnetic resonance angiography
Magnetic_resonance_angiography
Statistical mechanics model for ultrafast carrier relaxation
(which goes beyond the scope of this article and is destroyed by quantum dephasing processes), a regime of internal thermalization establishes: in this regime
Two_temperature_model
Ukrainian–American physical chemist (born 1970)
Hamiltonian dynamics, was developed to include zero-point energy, tunneling, dephasing and other quantum effects into molecular dynamics simulations. A quantum-classical
Oleg_Prezhdo
Villas-Bôas, J.M.; Hofbauer, F.; Böhm, G.; Kaniber, M.; Finley, J.J. (2009). "Dephasing of Exciton Polaritons in Photoexcited InGaAs Quantum Dots in GaAs Nanocavities"
Jonathan_Finley
American electrical engineer, educator and researcher
optical signal processing Institutions Purdue University Thesis Femtosecond Optical Pulse Generation and Dephasing Measurements in Condensed Matter (1984)
Andrew_M._Weiner
Class of semiconductor nanocrystals
Gabriele; Masia, Francesco; Borri, Paola; et al. (2018-12-12). "Long Exciton Dephasing Time and Coherent Phonon Coupling in CsPbBr 2 Cl Perovskite Nanocrystals"
Perovskite_nanocrystal
French physicist (born 1960)
Neely, D. (1998). "Observation of Electron Energies Beyond the Linear Dephasing Limit from a Laser-Excited Relativistic Plasma Wave". Physical Review
Victor_Malka
Proposed semiconductor implementation of quantum computers
Rudner, Mark; Mahalu, Diana; Umansky, Vladimir; Yacoby, Amir (2010). "Dephasing time of GaAs electron-spin qubits coupled to a nuclear bath exceeding
Spin_qubit_quantum_computer
mainly used for femtosecond pump-probe experiments in materials with long dephasing times. It is based on the inverse Fourier transform of the signal: F
Spectral_interferometry
Spectroscopic technique
broadening effects. After all of the spin-packets bunch up, they will dephase again just like an FID. In other words, a spin echo is a reversed FID followed
Pulsed electron paramagnetic resonance
Pulsed_electron_paramagnetic_resonance
Israeli electrical engineer and condensed matter physicist (born 1947)
Buks, E.; Schuster, R.; Heiblum, M.; Mahalu, D.; Umansky, V. (1998). "Dephasing in electron interference by a 'which-path' detector". Nature. 391 (6670):
Mordehai_Heiblum
Quantum mechanical system that interacts with a quantum-mechanical environment
Torrontegui, E; Kosloff, R (2016-09-02). "Activated and non-activated dephasing in a spin bath". New Journal of Physics. 18 (9) 093001. Bibcode:2016NJPh
Open_quantum_system
Quantum bit
the decoherence of the qubit wavefunction, due to energy relaxation or dephasing effects, must be limited to a suitably low rate. For electron-on-helium
Electron-on-helium_qubit
Field of statistical mechanics
"Quantum Extension of the Jarzynski Relation: Analogy with Stochastic Dephasing" (PDF). Physical Review Letters. 90 (17) 170604. Bibcode:2003PhRvL..90q0604M
Stochastic_thermodynamics
Israeli physicist (1952–2015)
Hermon, Z., Stern, A., Ben-Jacob, E., Phys. Rev. B49, 9757 (1994) ^"Dephasing Length and Coherence of a Quantum Soliton in an Ideal Long Josephson Junction"
Eshel_Ben-Jacob
an opposite temporal evolution with respect to the previous one. The dephasing of the last signal during t 3 {\displaystyle t_{3}} compensates the one
Two-dimensional electronic spectroscopy
Two-dimensional_electronic_spectroscopy
Quantum optical theoretical system
{S}}_{+}+g_{c}^{*}e^{i\Delta t}{\hat {a}}^{\dagger }{\hat {S}}_{-}} for dephasing Δ = ω c − ω e g {\displaystyle \Delta =\omega _{c}-\omega _{eg}} . In
Tavis–Cummings_model
American academic
(Altshuler-Aronov corrections). Together with Aronov, he has also developed theory of dephasing in weak-localization. In collaboration with Boris Shklovskii, Altshuler
Boris_Altshuler
Type of superconducting quantum bit
in current generate fluctuations in the plasma frequency, which causes dephasing of the quantum states. The phase qubit is operated in the zero-voltage
Phase_qubit
American physicist and author
Scientific Pub Co. ISBN 978-9971-978-46-4. Freericks, J. K. (1989). "Dephasing effects in a two-dimensional magnetic-breakdown linked-orbit network:
James_K._Freericks
Study of the relations between thermodynamics and quantum mechanics
is not recoverable, due to interaction with a bath that causes energy dephasing. The bath, in this case, acts like a measuring apparatus of energy. This
Quantum_thermodynamics
Science, UC Davis Department of Atomic Energy (India) Departure function Dephasing Depolarization ratio Deposition (aerosol physics) Deposition (phase transition)
Index_of_physics_articles_(D)
Israeli physical chemist
A. P.; Shank, C. V. (1997-03-15). "Quantum confinement and ultrafast dephasing dynamics in InP nanocrystals". Physical Review B. 55 (11): 7059–7067.
Uri_Banin
Type of MRI sequence
allowing the spins to dephase and rephase when required. After an excitation pulse (usually less than 90 degrees), the spins are dephased after a period of
Gradient_echo
Canadian writer
by English playwrights into French. Bienvenue published his first play Déphase nuit in 1984. His two plays Lettre d'amour pour une amante inavouée and
Yvan_Bienvenue
MRI sequence simulation technique
{\displaystyle F_{-}(0)^{*}} . Matthias Weigel (2015). "Extended phase graphs: dephasing, RF pulses, and echoes - pure and simple". J Magn Reson Imaging. doi:10
Extended_phase_graph
1966 composition by Steve Reich
relationships". Nevertheless, there is an alternation between periods of gradual dephasing and sections of temporary rhythmic stability. It is with this "stepped"
Reed_Phase
H_{1}=D_{1}P_{1}H_{2}P_{2}D_{2}.} Any complex Hadamard matrix is equivalent to a dephased Hadamard matrix, in which all elements in the first row and first column
Complex_Hadamard_matrix
Technique in spectroscopy
intensity of the NMR signal compared to a reference spectrum where no dephasing pulse is used. REDOR can be used to measure heteronuclear distances, and
Solid-state nuclear magnetic resonance
Solid-state_nuclear_magnetic_resonance
Extension of linear response theory in mesoscopic regimes
transitions are much weaker/slower than the environmental relaxation/dephasing effect, while SLRT assumes the opposite conditions. SLRT uses a resistor
Semilinear_response
Higher-order frequency analysis
Gerardo A.; Viola, Lorenza. "Qubit Noise Spectroscopy for Non-Gaussian Dephasing Environments". Physical Review Letters. 116 (15) 150503. arXiv:1512.01575
Polyspectra
time in the mesoscopic system. The study aimed to integrate the limited dephasing time with temperature dependency in the thermal regime. His work in mesoscopic
Raj_Mohanty
South Korean scientist (born 1965)
dynamics of either electronic or vibrational chromophores and homogeneous dephasing processes of those chromophores interacting with solvent molecules is
Cho_Minhaeng
German theoretical physicist
systematically include new many-body effects such as excitation-induced dephasing, non-Markovian effects, and semiconductor excitations with terahertz (abbreviated
Stephan_W._Koch
photoelectron spectroscopy and microscopy as methods for studying the electronic dephasing and spatial propagation of polarization fields in solid state materials
Hrvoje_Petek
Chinese American Physicist born c. 1964
(1993-08-23). "Transient nonlinear optical response from excitation induced dephasing in GaAs". Physical Review Letters. 71 (8): 1261–1264. doi:10.1103/PhysRevLett
Hailin_Wang
1126/science.270.5234.255. S2CID 220110562. Table 1 lists switching and dephasing times for various systems. Feynman, Richard (1982). "Simulating physics
Glossary_of_quantum_computing
Physiological process
(deoxyhemoglobin) makes the local magnetic field inhomogenous. This has the effect of dephasing the signal emitted in this domain, causing destructive interference in
Haemodynamic_response
Physical equations of light emission in semiconductors
{\displaystyle T[\Pi ]} contributions – they introduce excitation-induced dephasing, screening of Coulomb interaction, and additional highly correlated contributions
Semiconductor luminescence equations
Semiconductor_luminescence_equations
spin energy to the grain (contributing to T1 relaxation) or irreversibley dephase (contributing to T2 relaxation). Therefore the speed of relaxation most
Nuclear magnetic resonance logging
Nuclear_magnetic_resonance_logging
1967 composition by Steve Reich
whereas the live pieces are "stepped", alternating sections of gradual dephasing with sections of temporary rhythmic stability (Warburton 1988, 144). Reich
Violin_Phase
American chemist and professor
identifying the role of methyl groups and nuclear spins in spin echo dephasing. Her systematic studies in both glassy solvents and fluid solutions can
Sandra_Eaton
Israeli-Russian physicist (1939–1994)
interaction, and discovered that two distinct time scales, decoherence (dephasing) time and relaxation time, exist in one and two dimensions. (In three
Arkady_Aronov
Contemporary dance choreography
foundations of her repetitive dance and reveals the process of phasing/dephasing inherent in Steve Reich's famous Piano Phase, composed in 1967. The two
Fase
of many such spins with slightly different chemical shifts, there is a dephasing of the magnetisation in the x {\displaystyle x} - y {\displaystyle y}
Product_operator_formalism
rotation) move in two concentric orbits. The two orbits interfere to form dephased sinusoidal oscillations that determine the thread's pattern and crossing
3D_braided_fabrics
Experimental velocity measurement technique
"Femtosecond time-resolved photoelectron imaging on ultrafast electronic dephasing in an isolated molecule", J. Chem. Phys., 111 (11): 4859–4861, Bibcode:1999JChPh
Photofragment-ion_imaging
Lower Canada journalist, writer and politician
"La trajectoire de Joseph-Guillaume Barthe (1816-1893) : un romantisme déphasé", Mens, 19(1-2), 95–116. Works by Joseph-Guillaume Barthe at LibriVox (public
Joseph-Guillaume_Barthe
DEPHASING
DEPHASING
DEPHASING
DEPHASING
Girl/Female
Indian, Punjabi, Sikh
Lover of Wind; Air
Boy/Male
Muslim
Servant of the one, Servant of God
Boy/Male
Indian, Punjabi, Sikh
One who Loves All
Boy/Male
Arabic
Flag Holder
Girl/Female
English
Modernand Jennifer.
Surname or Lastname
English
English : topographic name for someone who lived on a croft to the north of the main settlement, from Middle English north ‘north’ + croft ‘enclosure’, ‘small enclosed field’, or a habitational name from a place named with these elements, as for example Northcroft in Cheshire. The dialect spelling craft seems to belong to southern and western counties.
Boy/Male
Arabic, Muslim
Poor; Destitute
Boy/Male
English, Hebrew
Protect; Heel
Girl/Female
Muslim
Snow white
Biblical
coming hither
DEPHASING
DEPHASING
DEPHASING
DEPHASING
DEPHASING