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Specific quantum state of a quantum harmonic oscillator
quantum mechanics, a coherent state is the specific quantum state of the quantum harmonic oscillator, often described as a state that has dynamics most
Coherent_state
Type of quantum state
In physics, a squeezed coherent state is a quantum state that is usually described by two non-commuting observables having continuous spectra of eigenvalues
Squeezed_coherent_state
Classic entropy of a quantum-mechanical density matrix
(x,p|y)^{*}\rho (y,y')\phi (x,p|y')dydy',} where φ is a "(Glauber) coherent state", given by ϕ ( x , p | y ) = π − 1 / 4 exp ( − | y − x | 2 / 2 ) +
Wehrl_entropy
Concept in quantum optics
differences. Coherent state are quantum mechanical states that have the maximal coherence and have the most "classical"-like behavior. A coherent state is defined
Higher_order_coherence
Concept in statistics
key statement: If the quantum system has a classical analog, e.g. a coherent state or thermal radiation, then P is non-negative everywhere like an ordinary
Quasiprobability_distribution
Quantum state, of opposed conditions
and at various scales. The most common example of a cat state is the superposition of two coherent states of a single optical mode of light. These states
Cat_state
U.S. technology company
Coherent Corp. (formerly II-VI Incorporated) is an American manufacturer of optical materials and semiconductors. As of 2023, the company had 26,622 employees
Coherent_Corp.
low-amplitude coherent states of light using displacements and adaptive measurements. The ability to discriminate signals encoded in coherent light has applications
Dolinar_receiver
Quantum states light can be in
state if its electric field strength Ԑ for some phases ϑ {\displaystyle \vartheta } has a quantum uncertainty smaller than that of a coherent state.
Squeezed_states_of_light
Protocol in quantum cryptography
demonstrations afterwards. Decoy state QKD protocols with non-coherent-state sources have also been analyzed. Passive decoy state protocol, where the decoy states
Decoy_state
Interferometry technique
\left\vert G\right\vert ^{2}-\left\vert g\right\vert ^{2}=1} . For a coherent state input | α ⟩ {\displaystyle |\alpha \rangle } at the first parametric
SU(1,1)_interferometry
Quantum mechanical model
annihilation operators – Operators useful in quantum mechanics Coherent state – Specific quantum state of a quantum harmonic oscillator Morse potential – Model
Quantum_harmonic_oscillator
Phase space used in quantum optics
operator on coherent states. The displacement operator is a unitary operator that takes a coherent state and turns it into another coherent state. The displacement
Optical_phase_space
Computational physics simulation tool
the projection to the coherent state | α ⟩ {\displaystyle |\alpha \rangle } . It produces a pictorial representation of the state ρ to illustrate several
Husimi_Q_representation
American technology company
Coherent, Inc., headquartered in Santa Clara, California is an American company that develops, manufactures and supports laser equipment and related specialty
Coherent,_Inc.
Phenomenon in quantum optics
equally spaced than a coherent laser field, a signature being a measured two-time correlation suppressed below that of a coherent laser field. More specifically
Photon_antibunching
Sub-field of quantum physics and optics
frequently encountered state of the light field is the coherent state, as introduced by E.C. George Sudarshan in 1960. This state, which can be used to
Quantum_optics
Role of coherent states
Coherent states have been introduced in a physical context, first as quasi-classical states in quantum mechanics, then as the backbone of quantum optics
Coherent states in mathematical physics
Coherent_states_in_mathematical_physics
Mathematical operator in quantum optics
localized state in phase space by a magnitude α {\displaystyle \alpha } . It may also act on the vacuum state by displacing it into a coherent state. Specifically
Displacement_operator
Foundational principle in quantum physics
{\omega ^{2}}{\Omega ^{2}}}\right)-1\right)}}={\frac {\hbar }{2}}.} A coherent state is a right eigenstate of the annihilation operator, a ^ | α ⟩ = α |
Uncertainty_principle
State of an atom or molecule
when an atom is in a coherent superposition of two states, both of which are coupled by lasers at the right frequency to a third state. With the system in
Dark_state
Sudarshan-Glauber displacement operator. One may think of a non-linear coherent state by generalizing the annihilation operator: A = a f ( a † a ) {\displaystyle
Non-linear_coherent_states
Model in quantum optics
probability to detect the two-level system in a given state when the field is initially in a coherent state. While the collapse has a simple classical explanation
Jaynes–Cummings_model
American theoretical physicist (1925–2018)
characteristics of different types of light, such as laser light (see coherent state) and light from light bulbs (see blackbody). His theories are widely
Roy_J._Glauber
Romanian physicist (born 1948)
{\displaystyle K^{\pi }=1^{+}} isovector states within a generalized coherent-state model". Phys. Rev. C. 36 (5): 2111–2126. Bibcode:1987PhRvC..36.2111R
Valentin_Ceaușescu
Topics referred to by the same term
Look up coherence, coherency, coherent, incoherence, or incoherent in Wiktionary, the free dictionary. Coherence is, in general, a state or situation in
Coherence
Amplifier that uses quantum mechanical methods
take in quantum signals, such as coherent states. This does not necessarily mean that the output is a coherent state; indeed, typically it is not. The
Quantum_amplifier
Salafi jihadist militant organisation
2018. Saltman, Erin Marie (3 November 2016). "The mind of Islamic State: more coherent and consistent than Nazism". The Guardian. ISBN 978-1-906603-98-4
Islamic_State
Basic unit of quantum information
system, a bit would have to be in one state or the other. However, quantum mechanics allows the qubit to be in a coherent superposition of multiple states
Qubit
Special class of quantum states
Gaussian state is always a classical multivariate Gaussian. For a single mode, a bosonic Gaussian state is the same as a squeezed coherent state, and general
Gaussian_state
Electromagnetic radiation humans can see
light (see degree of coherence). This led to the introduction of the coherent state as a concept which addressed variations between laser light, thermal
Light
Measurement of a quantum system which minimally disturbs it
S2CID 1360955. S. J. Dolinar (1973). "An optimum receiver for the binary coherent state quantum channel" (PDF). MIT Research Laboratory of Electronics Quarterly
Weak_measurement
Entropy measure
Coherent information is an entropy measure used in quantum information theory. It is a property of a quantum state ρ and a quantum channel N {\displaystyle
Coherent_information
Statistical study of photon counting
{\alpha }\right\vert }^{2}}{2}}|n\rangle } By projecting the coherent state onto the Fock state | n ⟩ {\displaystyle |n\rangle } , we can find the probability
Photon_statistics
Operator in quantum physics
technique can be generalised to other operators or state transformations. Squeezed coherent state Gerry, C.C. & Knight, P.L. (2005). Introductory quantum
Squeeze_operator
American journalist
International Herald Tribune, and CNET. Vance hosted an audio podcast called Semi-Coherent Computing from 2007 to 2008, in which he discussed enterprise computing
Ashlee_Vance
Wigner distribution function in physics as opposed to in signal processing
harmonic oscillator Wigner quasiprobability distribution of a coherent state. A cat state; the marginals are plotted on the right (p) and underneath (x)
Wigner quasiprobability distribution
Wigner_quasiprobability_distribution
Equivalence of all cached copies of a memory location
shared resource data that is stored in multiple local caches. In a cache coherent system, if multiple clients have a cached copy of the same region of a
Cache_coherence
Quantum state with the lowest possible energy
Pair production Vacuum energy Lamb shift False vacuum decay Squeezed coherent state Quantum fluctuation Scharnhorst effect Van der Waals force Casimir effect
Quantum_vacuum_state
Legendary Toltec king
contemporary Mesoamerican studies question whether the Toltec existed as a coherent state or group at all, and likewise whether Huemac was an actual historical
Huemac
Hilbert space of square-integrable holomorphic functions of n complex variables
_{j=1}^{n}{\overline {a_{j}}}z_{j}.} The function Fa is called the coherent state (applied in mathematical physics) with parameter a, and the function
Segal–Bargmann_space
Software that emulates an entire computer
case, the VM continues operation from the last-known coherent state, rather than the current state, based on whatever materials the backup server was last
Virtual_machine
Country in South Asia
patronage of painting, literary forms, textiles, and architecture. Newly coherent social groups in northern and western India, such as the Marathas, the
India
1998 film by Jeremiah S. Chechik
drugs, hypnotizes, and sexually assaults Peel while she's in a barely coherent state. When de Wynter is later distracted, Peel tries to escape but feels
The_Avengers_(1998_film)
Assumption of and reliance on the honesty of another party
confidence in the international order rooted in the idea of states acting as coherent state persons, underpins diplomacy and diplomatic stability. In systems, a
Trust_(social_science)
Modern form of the metric system
intensity). The system can accommodate coherent units for an unlimited number of additional quantities. These are called coherent derived units, which can always
International_System_of_Units
Aspect of fluid dynamics
this lower energy, coherent state, the cloud of electrons oscillate between two quantum states: a ground state, and an excited state where one electron
Exclusion_zone_(physics)
Mathematical approach to quantum optics
distribution theory. If the quantum system has a classical analog, e.g. a coherent state or thermal radiation, then P is non-negative everywhere like an ordinary
Glauber–Sudarshan P representation
Glauber–Sudarshan_P_representation
Force resulting from the quantisation of a field
effect. Negative energy Scharnhorst effect Van der Waals force Squeezed coherent state Cardy formula Lamoreaux, Steven K. (2005). "The Casimir force: Background
Casimir_effect
Physical phenomenon
state, which could be an odd or even coherent state, that will be "conditioned to the classical information of the sender", creating a two mode state
Quantum_teleportation
Representation theory of the symplectic group
2 {\displaystyle f_{z}(x)=e^{izx^{2}/2}} lies in L2 and is called a coherent state. These functions lie in a single orbit of SL(2,R) generated by f i (
Oscillator_representation
American physicist
experiments on Fe8 led him to an extensive study of the larger field of coherent state path integrals, especially as they pertain to quantum and semi-classical
Anupam_Garg
Type of uncertainty of meaning where several interpretations are possible
{\displaystyle |1\rangle } may mean a state with a single photon, or the coherent state with mean amplitude equal to 1, or state with momentum equal to unity,
Ambiguity
Function in thermodynamics and statistical physics
\langle x,p|e^{-\beta {\hat {H}}}|x,p\rangle {\frac {dx\,dp}{h}}.} A coherent state is an approximate eigenstate of both operators x ^ {\displaystyle {\hat
Partition function (statistical mechanics)
Partition_function_(statistical_mechanics)
Number of particles in a thermodynamic system
the particle number operator (see Fock state) is conjugate to the phase of the classical wave (see coherent state). One measure of air pollution used in
Particle_number
Dynamical system
(lattices or networks), and real (number or vector), local, continuous state variables. Studied systems include populations, chemical reactions, convection
Coupled_map_lattice
Mathematical operation in quantum optics, general relativity and other areas of physics
operator–state correspondence. They can also be defined as squeezed coherent states. BCS wave function is an example of squeezed coherent state of fermions
Bogoliubov_transformation
King of Sicily from 1130 to 1154
Ariano, an attempt to establish his dominions in southern Italy as a coherent state. He returned to check on his sons' progress in 1140 and then went to
Roger_II_of_Sicily
Proposed approach to a large-scale quantum computer based on Schrödinger cat states
bit-flip decreases exponentially with the number of photons in the coherent state. In conventional superconducting transmon-based architectures using
Cat_qubit_quantum_computer
Dominance of states through indirect means
"Korea's Overseas Development Backfires". Korea Times. December 4, 2009. "Coherent State Support Key to Overseas Resources Development". Korea Times. July 22
Neocolonialism
Type of electronic noise
detector with a quantum efficiency below unity. Only in an exotic squeezed coherent state can the number of photons measured per unit time have fluctuations smaller
Shot_noise
Distinguished surfaces of dynamic trajectories
Lagrangian coherent structures (LCSs) are distinguished surfaces of trajectories in a dynamical system that exert a major influence on nearby trajectories
Lagrangian_coherent_structure
Quantum electromechanical process
of coherent states | { v } ⟩ {\displaystyle |\{v\}\rangle } . This allows for the operators which comprise the field to act on the coherent state and
Resonance_fluorescence
Russian physicist
ordered magnetic state, and which can be described in terms of the condensation of magnetic excitations to a coherent quantum state ... At the Kapitza
Yury_Bunkov
Elementary particle or quantum of light
vice versa. A coherent state minimizes the overall uncertainty as far as quantum mechanics allows. Quantum optics makes use of coherent states for modes
Photon
Theory of quantum gravity merging quantum mechanics and general relativity
the coherent state does not depend and so their quantum fluctuations are not suppressed. There is also the restriction, so far, that these coherent states
Loop_quantum_gravity
light (see degree of coherence). This led to the introduction of the coherent state as a quantum description of laser light and the realization that some
History_of_optics
Global financial services company
State Street Corporation is an American multinational financial services and bank holding company headquartered at One Congress Street in Boston. It is
State_Street_Corporation
Criterion for evaluating rules for fair division
definitely coherent. However, it is not the only coherent rule: the Talmudic rule of the contested garment can be extended to a coherent division rule
Coherence_(fairness)
Quantum correlations related to wave-particle duality
Hanbury Brown, R.; Twiss, R. Q. (1956). "Correlation between Photons in two Coherent Beams of Light". Nature. 177 (4497): 27–29. doi:10.1038/177027a0. ISSN 0028-0836
Hanbury Brown and Twiss effect
Hanbury_Brown_and_Twiss_effect
Unix operating system clone
Coherent is a clone of the Unix operating system for IBM PC compatibles and other microcomputers, developed and sold by the now-defunct Mark Williams Company
Coherent_(operating_system)
Software product development and consulting company
Coherent Solutions is a software product development and consulting company headquartered in Minneapolis, Minnesota. Founded in 1995, the company provides
Coherent_Solutions
recently, quantum acoustics has been used as a term to describe the coherent state limit of lattice vibrations, in analogue to quantum optics. Acoustics
Quantum_acoustics
Polish mathematician and physicist
structure of W*-algebras, quantization of physical systems by means of the coherent state map, as well as quantum and classical integrable systems. Anatol Odzijewicz
Anatol_Odzijewicz
Potential for two waves to interfere
sources that are not strictly monochromatic, they may still be partly coherent. When interfering, two waves add together to create a wave of greater amplitude
Coherence_(physics)
Formulation of quantum mechanics
\omega t+m\omega x\sin \omega t;\,0\right).} Typically, a "bump" (or coherent state) of energy E ≫ ħω can represent a macroscopic quantity and appear like
Phase-space_formulation
Quantum effect of uncertainty
by the coherent state of light, or the superposition of harmonic oscillators eigenstates. Erwin Schrödinger first derived the coherent state for the
Quantum_noise
collapse zero-point energy bound state coherent state squeezed coherent state density state Fock state, Fock space vacuum state quasinormal mode no-cloning
List of mathematical topics in quantum theory
List_of_mathematical_topics_in_quantum_theory
Propagating atomic wave
An atom laser is a coherent state of propagating atoms. They are created out of a Bose–Einstein condensate of atoms that are output coupled using various
Atom_laser
1976 Italian crime comedy film
doubtful if, even in its complete form the story would have been at all coherent" stating the film "is aimed, to an almost fetishistic degree, at the lowest
The_Cop_in_Blue_Jeans
Multi-scale chaotic motions
that need to be classified into more elementary components, referred to coherent turbulent structures. Such a structure must have temporal coherence, i
Coherent_turbulent_structure
Physical fields obeying the Schrödinger equation
known as a coherent state path integral, because the field itself is an annihilation operator whose eigenstates can be thought of as coherent states of
Schrödinger_field
System in electronic signal processing
signal's carrier wave and the receiver's local oscillator for the purpose of coherent demodulation. In the transmitter of a communications carrier system, a
Carrier_recovery
Range of physical processes in physics
scattering are thus known as diffusers. Coherent backscattering, an enhancement of backscattering that occurs when coherent radiation is multiply scattered by
Scattering
Phenomenon in which a neutrino changes lepton flavor as it travels
the Standard Model is capable of pinning down a charged lepton into a coherent state that is not a mass eigenstate, in the first place; instead, while the
Neutrino_oscillation
6, 2026. Retrieved April 8, 2026. "Vertiv Holdings, Lumentum Holdings, Coherent, and EchoStar Set to Join S&P 500; Others to Join S&P 100, S&P MidCap 400
List_of_S&P_500_companies
German-born theoretical physicist (1879–1955)
colleagues that the laws of physics have to explain everything in nature coherently and consistently." Einstein expounded his spiritual outlook in a wide
Albert_Einstein
Transaction tracker in computer systems
a coherency controller (snooper) in a cache (a snoopy cache) monitors or snoops the bus transactions, and its goal is to maintain a cache coherency in
Bus_snooping
Cache coherence protocol
MOSI protocol is an extension of the basic MSI cache coherency protocol. It adds the Owned state, which indicates that the current processor owns this
MOSI_protocol
Lvovsky
single-photon Fock state. Observation of quantum memory for squeezed light. A method for optical quantum process tomography by coherent state probing. Producing
Alexander_Lvovsky
Spectroscopy with lasers with very short pulses
into a coherent superposition of states, followed by a phase conjugate second pulse that pushes the system into a non-oscillating excited state, and finally
Ultrafast_laser_spectroscopy
The master oscillator (a seed laser to be amplified) produces a highly coherent beam, and an optical amplifier is used to increase the power of the beam
Laser_power_scaling
American electric vehicle and clean energy company
pandemic, Tesla closed the Fremont Factory in March 2020 due to California state and Alameda county COVID restrictions. When California lifted restrictions
Tesla,_Inc.
West Germanic language
commonalities with Southern accents suggest it developed into a highly coherent and homogeneous variety in the 19th or early 20th century. AAVE is commonly
English_language
Theory developed by Karl Marx
the conclusion that the state must be abolished. Rather than a single, coherent theory, Marx and Engels's work on the state contains a variety of perspectives
Marx's_theory_of_the_state
Electronic display technology
example, if there is a power outage, the pixels will gradually lose their coherent state, and the image will "fade" from the screen. The following flat-display
Flat-panel_display
Mass murder of Circassians by the Russian Empire
Circassia, as well as recognition from Paris, if they unified into a coherent state,[full citation needed] and in response the Circassian tribes formed
Circassian_genocide
Nationalism that equates 'state identity' with 'nation identity'
"territorial nations," where the state exists before a coherent sense of national belonging is formed. In this model, the state uses institutions—such as public
State_nationalism
Mathematical structures that allow quantum mechanics to be explained
Fock (number) representation and the Segal–Bargmann (Fock-space or coherent state) representation (named after Irving Segal and Valentine Bargmann). All
Mathematical formulation of quantum mechanics
Mathematical_formulation_of_quantum_mechanics
Ideal AI behavior if humans were maximally rational and knowledgeable
Coherent extrapolated volition (CEV) is a theoretical framework in the field of AI alignment describing an approach by which an artificial superintelligence
Coherent extrapolated volition
Coherent_extrapolated_volition
COHERENT STATE
COHERENT STATE
Boy/Male
American, Australian, British, Celtic, Chinese, Christian, English, German, Greek, Irish
Rock; Bear; Adherent of the Goddess Artemis; Bear Man; Eagle of Thor
Surname or Lastname
English, Scottish, and Indian (southern states)
English, Scottish, and Indian (southern states) : variant spelling of Matthew. It is found as a personal name among Christians in India, and in the U.S. is used as a family name among families from southern India.
Girl/Female
Hebrew
Sparkle.
Boy/Male
Tamil
God gift, Inherent, Inscribed into something, Within something
Boy/Male
Arabic, Muslim, Sindhi
Donation; Grant; Gift; Inherent; Giving; Similar to Wahb
Boy/Male
French Teutonic
Adherent of a nobleman.
Boy/Male
French English German
Adherent of a nobleman.
Surname or Lastname
English
English : of uncertain origin; possibly from a reduced form of the personal name Dominick.Chinese : from the name of Meng Mingshi, a senior minister of the state of Qin in the Spring and Autumn period (722–481 bc). His descendants adopted the first character of his given name, which means ‘bright’, as their surname.
Boy/Male
Hindu
God gift, Inherent, Inscribed into something, Within something
Boy/Male
French American Teutonic English German
Adherent of a nobleman.
Boy/Male
Indian, Telugu
Inherent; Inscribed into Something; Within Something
Boy/Male
French
Adherent of a nobleman.
Boy/Male
Hindu
God gift, Inherent, Inscribed into something, Within something
Boy/Male
Tamil
God gift, Inherent, Inscribed into something, Within something
Surname or Lastname
Indian (northern states)
Indian (northern states) : Hindu name meaning ‘lamp’, from Sanskrit dīpa. It occurs commonly as the final element of compound personal names, e.g. in Kuldeep ‘light of the family’. Subsequently, it appears to have evolved into a surname.English : presumably from the adjective deep, either a topographic name for someone who lived in a deep valley, or perhaps a nickname for a ‘deep’, thoughtful person.
Boy/Male
Arabic, Muslim, Sindhi
Gift; Inherent; Giving Donation; Grant
Surname or Lastname
English
English : ethnic name from Old French Lohereng ‘man from Lorraine’ (see Lorraine).
Boy/Male
Australian, Greek
Adherent of the Goddess Artemis
Boy/Male
American, Australian, British, Celtic, Christian, English, Greek
Noble; Rock; Adherent of the Goddess Artemis; Bear Man; Eagle of Thor
Boy/Male
American, Australian, British, English, French, German
God's Protection; Variant of Anseim; Introduced from Germany by 11th Century St Anselm; Adherent of a Nobleman
COHERENT STATE
COHERENT STATE
COHERENT STATE
COHERENT STATE
COHERENT STATE
COHERENT STATE
COHERENT STATE