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Concept in computer science
Reversible computing is any model of computation where every step of the process is time-reversible. This means that, given the output of a computation
Reversible_computing
Hypothetical concept in astrophysics
framework is invalidated, however, by the principle of reversible computation. Reversible computing is a model of computation where all processes are logically
Dyson's_eternal_intelligence
Computing by new or unusual methods
Unconventional computing (also known as alternative computing or nonstandard computation) is computing by any of a wide range of new or unusual methods
Unconventional_computing
Extra bits in computing paradigms
in computing paradigms requiring reversible operations, such as classical reversible computing and quantum computing. Unlike classical computing, where
Ancilla_bit
ISBN 978-1-60558-077-7. S2CID 14228334. "Janus Playground". "A reversible interpreter". "RC3: Reversible Computing Compiler Collection". Deworetzki, Niklas; Kutrib
Janus (time-reversible computing programming language)
Janus_(time-reversible_computing_programming_language)
American physicist, information theorist, and IBM Research fellow
realm of quantum computation, but also in cellular automata and reversible computing. He discovered, with Gilles Brassard, the concept of quantum cryptography
Charles H. Bennett (physicist)
Charles_H._Bennett_(physicist)
Physical lower limit to energy consumption of computation
consumption below this lower bound would require the development of reversible computing. The principle was first proposed by Rolf Landauer in 1961. Landauer's
Landauer's_principle
Universal reversible logic gate, applied in quantum computing
universal reversible logic gate, which means that any classical reversible circuit can be constructed from Toffoli gates. There is also a quantum-computing version
Toffoli_gate
Software application of the concept of reversible computing
concept of reversible computing. Because it offers a possible solution to the heat problem faced by chip manufacturers, reversible computing has been extensively
Reverse_computation
Topics referred to by the same term
time-reversed dynamics are well defined Reversible diffusion, an example of a reversible stochastic process Reversible process (thermodynamics), a process
Reversibility
Computing using molecular biology hardware
DNA computing is an emerging branch of unconventional computing which uses DNA, biochemistry, and molecular biology hardware, instead of the traditional
DNA_computing
Cellular automaton that can be run backwards
automata. Reversible cellular automata form a natural model of reversible computing, a technology that could lead to ultra-low-power computing devices.
Reversible_cellular_automaton
Universal reversible logic gate, applied in quantum computing
field of reversible computing and conservative logic. Developed within the framework of conservative logic, the gate is designed to align computing processes
Fredkin_gate
Type of physical or mathematical property
_{k}})} . A univariate stationary Gaussian process is time-reversible. Markov processes are reversible if and only if their stationary distributions have the
Time_reversibility
A reversible programming language is designed to bridge the gap between the theoretical models of reversible computing and practical software development
Reversible programming language
Reversible_programming_language
Quantum logic gate
{1}{2}}(I_{1}-Z_{1})H_{2}}} . The CNOT gate is also used in classical reversible computing. The CNOT gate operates on a quantum register consisting of 2 qubits
Controlled_NOT_gate
Process whose direction can be reversed
processes in isolated systems are never reversible, cyclical processes can be reversible or irreversible. Reversible processes are hypothetical or idealized
Reversible process (thermodynamics)
Reversible_process_(thermodynamics)
Basic circuit in quantum computing
quantum logic gates are reversible. It is possible to perform classical computing using only reversible gates. For example, the reversible Toffoli gate can implement
Quantum_logic_gate
Frequency at which a CPU chip or core is operating
ultimate limits to energy per transition are explored in reversible computing. The first fully reversible CPU, the Pendulum, was implemented using standard CMOS
Clock_rate
JAL Janus (concurrent constraint programming language) Janus (time-reversible computing programming language) JASS Java JavaFX Script JavaScript JCL JEAN
List_of_programming_languages
Japanese computer scientist (1949–2025)
Hiroshima University. His contributions include showing that reversible cellular automata and reversible two-counter machines could be Turing-complete, and solving
Kenichi_Morita
Canadian-American physicist and computer scientist
computer scientist, known for his work on cellular automata and reversible computing. He is a research affiliate with the Computer Science and Artificial
Norman_Margolus
Theorem about a certain class of control-flow graphs
control-state encoding. The Reversible Structured Program Theorem is an important concept in the field of reversible computing. It posits that any computation
Structured_program_theorem
American physicist and computer scientist (1934–2023)
work on reversible computing and cellular automata. While Konrad Zuse's book, Calculating Space (1969), mentioned the importance of reversible computation
Edward_Fredkin
Diagram that represents a workflow or process
are a theoretical foundation for structured reversible programming and energy-efficient reversible computing systems. The American National Standards Institute
Flowchart
Type of conservative logic circuit
computer, a type of conservative logic circuit, is an idealized model of a reversible mechanical computer based on Newtonian dynamics, proposed in 1982 by Edward
Billiard-ball_computer
Computer command
proposed in his PhD thesis (Reversible Execution as a Diagnostic Tool) in 1971 at Cornell University the concept of reversible execution, which is essentially
Undo
Digital logic implementation technology based on superconducting Josephson junctions
operated with zero energy loss (no local increase in entropy), making reversible computing possible. Low energy use and heat generation is critical in supercomputer
Quantum_flux_parametron
Boltzmann constant and T is the operating temperature of the computer. Reversible computing is not subject to this lower bound. T cannot, even in theory, be
Limits_of_computation
Time reversal symmetry in physics
results in modern computing are closely related to this problem—reversible computing, quantum computing and physical limits to computing, are examples. These
T-symmetry
American-German physicist, engineer (1927–1999)
dissipated as heat. This principle is relevant to reversible computing, quantum information and quantum computing. He also is responsible for the Landauer formula
Rolf_Landauer
Device performing a Boolean function
Propositional calculus Race hazard Reversible computing Superconducting computing Truth table Unconventional computing Jaeger (1997). Microelectronic Circuit
Logic_gate
Data compression approach allowing perfect reconstruction of the original data
Compression (LTAC) Normal number – Number with all digits equally frequent Reversible computing – Concept in computer science Universal code (data compression) –
Lossless_compression
Central to reversible computing are the concepts of running computations backward and handling functions that are not inherently injective. Program inversion
Program Inversion, Interpretation, and Injectivization
Program_Inversion,_Interpretation,_and_Injectivization
Mathematical model of a complex system
network models. Computational engineering Computational cognition Reversible computing Agent-based model Artificial neural network Computational linguistics
Computational_model
Database operation that restores a previous state
In database technologies, a rollback is an operation which returns the database to some previous state. Rollbacks are important for database integrity
Rollback_(data_management)
Toffoli introduces the reversible Toffoli gate, which (together with initialized ancilla bits) is functionally complete for reversible classical computation
Timeline of quantum computing and communication
Timeline_of_quantum_computing_and_communication
Quantum Computing: A Gentle Introduction is a textbook on quantum computing. It was written by Eleanor Rieffel and Wolfgang Polak, and published in 2011
Quantum Computing: A Gentle Introduction
Quantum_Computing:_A_Gentle_Introduction
Stepping back in time through source code
significantly slows interaction. Programming languages intended for reversible computing inherently support stepping a program backwards via uncomputation
Time_travel_debugging
Cryptanalytic method for unauthorized users to access data
can be designed not to encounter this theoretical obstruction (see reversible computing), though no such computers are known to have been constructed.[citation
Brute-force_attack
Roman god
A-un Gozu and Mezu Lugal-irra and Meslamta-ea Dōsojin Janus (time-reversible computing programming language) Janus (concurrent constraint programming language)
Janus
Programming language
{\displaystyle v} . Reversible flow chart language (RL) is a simple reversible imperative programming language designed for reversible computing, where each computational
Flow_chart_language
Types of atheism
there are none. Attempts to rescue divine cognition through perfect reversible computing collapse under their own technical requirements, generating internal
Negative_and_positive_atheism
Electronic signal to synchronize circuits
dissipate energy, but energy is wasted in the driving transistors. In reversible computing, inductors can be used to store this energy and reduce the energy
Clock_signal
Rare brain condition, leading to severe swelling
Posterior reversible encephalopathy syndrome (PRES), also known as reversible posterior leukoencephalopathy syndrome (RPLS), is a rare condition in which
Posterior reversible encephalopathy syndrome
Posterior_reversible_encephalopathy_syndrome
Town in Massachusetts, United States
structure, the Fredkin gate and the Billiard-Ball Computer Model for reversible computing Fayette F. Forbes (1851–1935), water engineer, plant collector, and
Brookline,_Massachusetts
Initiative to rethink the concept of computing
Task Force on Rebooting Computing (TFRC), housed within IEEE Computer Society, is the new home for the IEEE Rebooting Computing Initiative. Founded in
IEEE_Rebooting_Computing
Combinatorial reconfiguration problem
edge is reversed, subject to the same constraints. This is a form of reversible logic in that each sequence of edge orientation changes can be undone
Nondeterministic constraint logic
Nondeterministic_constraint_logic
Model of quantum computing
small values of n. A reversible n-bit classical logic gate gives rise to a reversible n-bit quantum gate as follows: to each reversible n-bit logic gate f
Quantum_circuit
Topics referred to by the same term
transfer protocol for use on bulletin board systems Janus (time-reversible computing programming language) Janus attack, an alternative name of a Man-in-the-middle
Janus_(disambiguation)
Electronic hardware trend
does not constrain the efficiency of reversible computing. This, in conjunction with other Beyond CMOS computing technologies, could permit continued
Koomey's_law
Disaster recovery and business continuity auditing Digital preservation Reversible computing "Data Backup Options" (PDF). www.cisa.gov. Retrieved 6 November 2023
Glossary_of_backup_terms
irreversible circuit can be simulated by a reversible circuit that is padded with additional outputs. Reversible computing Landauer, Rolf (1961), "Irreversibility
Irreversible_circuit
Low-power electronic circuits which use reversible logic to conserve energy
CMOS[citation needed], and simple circuit designs get complicated. Reversible computing – Concept in computer science Ballistic deflection transistor Gojman
Adiabatic_circuit
Mathematical concept
function Integral of inverse functions Inverse Fourier transform Reversible computing Not to be confused with numerical exponentiation such as taking the
Inverse_function
Belarusian-Canadian electrical engineer
learning to logic design and is known for her earlier research in reversible computing. Educated in the Soviet Union, Belarus, and Poland, she works in
Svetlana_Yanushkevich
Thermodynamic process that is reversible and adiabatic
process that is both adiabatic and reversible.[excessive citations] In thermodynamics, adiabatic processes are reversible. Clausius (1875) adopted "isentropic"
Isentropic_process
American synthetic biologist
VLSI micro displays, and made advances in the field of adiabatic (reversible) computing. It was also during this period that Knight's interests in biological
Tom_Knight_(scientist)
Maximum energy available for use
analogy with its physical definition, in information theory related to reversible computing. Exergy is also synonymous with available energy, exergic energy
Exergy
Computer that uses photons or light waves
Optical computing or photonic computing uses light waves produced by lasers or incoherent sources for data processing, data storage or data communication
Optical_computing
Unit of information
The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a
Bit
Type of extremely powerful computer
DeBenedictis, Erik P. (2005). "Reversible logic for supercomputing". Proceedings of the 2nd conference on Computing frontiers. ACM Press. pp. 391–402
Supercomputer
Kind of cellular automaton
cellular automaton is reversible globally if and only if it is reversible at the block level. The ease of designing reversible block cellular automata
Block_cellular_automaton
Discrete model of computation
automaton is reversible. The proof by Jarkko Kari is related to the tiling problem by Wang tiles. When a 2D automata is not reversible, often the proof
Cellular_automaton
important case of fundamental ultimate limit for logic operation is the reversible computing. The tiny autonomous devices (for example smartdust or autonomous
Deep-sub-voltage nanoelectronics
Deep-sub-voltage_nanoelectronics
Dutch theoretical computer scientist
the editorial boards of Distributed Computing (1987–2003), Information Processing Letters; the Theory of Computing Systems; the Parallel Processing Letters;
Paul_Vitányi
Computer scientist
optimization. Key contributions include: Reversible circuit synthesis - Developed algorithms for synthesizing reversible Boolean functions using minimal numbers
Dmitri_Maslov
Medical condition
Reversible cerebral vasoconstriction syndrome (RCVS, sometimes called Call-Fleming syndrome) is a disease characterized by a weeks-long course of thunderclap
Reversible cerebral vasoconstriction syndrome
Reversible_cerebral_vasoconstriction_syndrome
Principle in kinetic systems
kinetics seem to be clear. A Markov process is called a reversible Markov process or reversible Markov chain if there exists a positive stationary distribution
Detailed_balance
Computation machine that uses continuously varying data technology
and synthetic-aperture radar, remained the domain of analog computing (and hybrid computing) well into the 1980s, since digital computers were insufficient
Analog_computer
Nature photonics journal, a nature communication contribution on reversible computing and a patent. Dolev has also contributed to research in Complex Networks
Shlomi_Dolev
American physicist of quantum computing (1930–2022)
description in 1973 of reversible Turing machines by physicist Charles H. Bennett. Benioff's model of a quantum computer was reversible and did not dissipate
Paul_Benioff
an updated source. Bidirectional transformation Inverse function Reversible computing View (SQL) Janis Voigtländer, Zhenjiang Hu, Kazutaka Matsuda, and
Bidirectionalization
Measure of supercomputer performance
Zettascale computing refers to computing systems capable of calculating at least "1021 IEEE 754 Double Precision (64-bit) operations (multiplications
Zettascale_computing
(link) DeBenedictis, Erik P. (2005). "Reversible logic for supercomputing". Proceedings of the 2nd conference on Computing frontiers. ACM Press. pp. 391–402
Computer performance by orders of magnitude
Computer_performance_by_orders_of_magnitude
Storage of digital data readable by computers
may be permanent (read only media), formed once (write once media) or reversible (recordable or read/write media). The following forms are in common use
Computer_data_storage
American computer scientist
highly cited research papers on fault-tolerant design, reversible computing, and stochastic computing. Hayes became an IEEE Fellow in 1985 "for contributions
John_P._Hayes
Process in quantum computing
(QEC) comprises a set of techniques used in quantum memory and quantum computing to protect quantum information from errors arising from decoherence and
Quantum_error_correction
in the history of computing: from prehistory until 1949. For narratives explaining the overall developments, see History of computing. Finger reckoning
Timeline of computing before 1950
Timeline_of_computing_before_1950
Measure of performance of heat engines
or reversible version of the system for heat engines. It can also be described as the ratio of the useful work output of the system to the reversible work
Exergy_efficiency
Methods that imitate, replicate or use natural processes
artificial immune systems, fractal geometry, artificial life, DNA computing, and quantum computing, among others. However, the field is more related to biological
Natural_computing
German computer scientist and engineer (1910–1995)
Digital Computing (3rd ed.). Springer. pp. 13, 961. ISBN 978-3030409739. Bruderer, Herbert (2021). Milestones in Analog and Digital Computing (3rd ed
Konrad_Zuse
Algorithm for public-key cryptography
fourteenth annual ACM symposium on Theory of computing - STOC '82. New York, NY, USA: Association for Computing Machinery. pp. 365–377. doi:10.1145/800070
RSA_cryptosystem
Basic unit of quantum information
In quantum computing, a qubit (/ˈkjuːbɪt/) or quantum bit is a basic unit of quantum information, the quantum version of the classic binary bit. A qubit
Qubit
Quantum algorithm for integer factorization
reversible gates, starting with ripple-carry adders. Knowing the base and the modulus of exponentiation facilitates further optimizations. Reversible
Shor's_algorithm
Quantum computing technique
Uncomputation is a technique, used in reversible circuits, for cleaning up temporary effects on ancilla bits so that they can be re-used. Uncomputation
Uncomputation
A reversible solid oxide cell (rSOC) is a solid-state electrochemical device that is operated alternatively as a solid oxide fuel cell (SOFC) and a solid
Reversible_solid_oxide_cell
Physical law for entropy and heat
theorem states that all reversible engines operating between the same heat reservoirs are equally efficient. Thus, any reversible heat engine operating
Second_law_of_thermodynamics
Medical condition
presentations of pseudodementia may mimic organic dementia, but are essentially reversible on treatment and doesn't lead to actual brain degeneration. However, it
Pseudodementia
Subfield of computer science and mathematics
McGarraghy. Natural Computing Algorithms, Springer Verlag, 2015 Fredkin, F. Digital mechanics: An informational process based on reversible universal CA. Physica
Theoretical_computer_science
Minor form of stroke
including diffusion sequences". MRI is a better imaging modality for TIA than computed tomography (CT), as it is better able to pick up both new and old ischemic
Transient_ischemic_attack
Model of changes in a sequence over evolutionary time
stationary model. Generalised time reversible (GTR) is the most general neutral, independent, finite-sites, time-reversible model possible. It was first described
Substitution_model
Property of a thermodynamic system
{\textstyle W} done by a reversible heat engine was found to be the product of the Carnot efficiency (i.e., the efficiency of all reversible heat engines with
Entropy
Thought experiment of 1867
thermodynamic entropy as long as they were thermodynamically reversible. He suggested these "reversible" measurements could be used to sort the molecules, violating
Maxwell's_demon
Process of changing installed software to newer versions
temporarily or permanently, with temporarily applied fixes remaining reversible until they are made permanent. IBM i also distributes fixes in aggregated
Software_update
Mathematical study of waiting lines, or queues
have since seen applications in telecommunications, traffic engineering, computing, project management, and particularly industrial engineering, where they
Queueing_theory
Game and demonstration of logic gates
Turing Tumble is a game and demonstration of logic gates via mechanical computing. Named after Alan Turing, the game could, in the abstract, duplicate the
Turing_Tumble
Enzyme kinetics for reversible reactions
intact cell because there is product available. Reversible Michaelis–Menten kinetics, using the reversible form of the Michaelis–Menten equation, is therefore
Reversible Michaelis–Menten kinetics
Reversible_Michaelis–Menten_kinetics
Color model
The reversible variant gives 4.21 dB of coding gain, compared to 3.54 dB for the BT.470 color matrix and 3.98 dB for the JPEG 2000 reversible color
YCoCg
1948 book written by Norbert Wiener
theme of this chapter is an exploration of the contrast between time-reversible processes governed by Newtonian mechanics and time-irreversible processes
Cybernetics: Or Control and Communication in the Animal and the Machine
Cybernetics:_Or_Control_and_Communication_in_the_Animal_and_the_Machine
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
Girl/Female
Indian
One who is Lucky
Girl/Female
Indian, Punjabi, Sikh
Temple of the True God of Heaven
Boy/Male
Indian
Supporter, Helper, One who helps
Girl/Female
Hindu, Indian
Garland of Victory
Girl/Female
Muslim
Crowned with laurels
Boy/Male
Hindu
Narang ca be used as a surname in various culture
Boy/Male
Tamil
Mrinmoy | à®®à¯à®°à¯€à®¨à¯à®®à¯‹à®¯
Made of earth
Surname or Lastname
English
English : from the Middle English and Old French female personal name Alis (Alice), which, together with its diminutive Alison, was extremely popular in England in the Middle Ages. The personal name is of Germanic origin, brought to England from France by the Normans; it is a contracted form of Germanic Adalhaid(is), which is composed of the elements adal ‘noble’ + haid ‘brilliance’, ‘beauty’.
Girl/Female
Muslim
(This was the Name of a poetess, Daughter of al-waqa)
Boy/Male
Tamil
Trustworthy friend, Pride, Ever smiling, Devine smile
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
REVERSIBLE COMPUTING
n.
The art of measuring and computing the cubical contents of bodies and figures; -- distinguished from planimetry.
adv.
In a reversible manner.
adv.
In an irreversible manner.
n.
An arbitrary fixed date, for which the elements used in computing the place of a planet, or other heavenly body, at any other date, are given; as, the epoch of Mars; lunar elements for the epoch March 1st, 1860.
a.
Hence, having a pattern or finished surface on both sides, so that either may be used; -- said of fabrics.
n.
An instrument for measuring the intensity of the photogenic (light-producing) rays, and computing the power of object glasses.
n.
A contrivance for computing the revolutions of a wheel; an odometer.
n.
The state or quality of being irreversible.
a.
Referable.
a.
Capable of being reversed; as, a chair or seat having a reversible back; a reversible judgment or sentence.
n.
A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion.
a.
Incapable of being reversed, recalled, repealed, or annulled; as, an irreversible sentence or decree.
n.
The state or quality of being irreversible; irreversibleness.
p. p. & a.
Worked out by calculation; as calculated tables for computing interest; ascertained or conjectured as a result of calculation; as, the calculated place of a planet; the calculated velocity of a cannon ball.
n.
The quality of being reversible.
a.
Incapable of being reversed or turned about or back; incapable of being made to run backward; as, an irreversible engine.
a.
Irreversible.
v. i.
To make an enumeration or computation; to engage in numbering or computing.
a.
Capable of, or admitting of, reverting or being reverted; as, a revertible estate.
a.
Incapable of being recalled or revoked; unchangeable; irreversible; unalterable; as, an irrevocable promise or decree; irrevocable fate.