# Quantum solution to the arrow-of-time dilemma.

@article{Maccone2009QuantumST, title={Quantum solution to the arrow-of-time dilemma.}, author={Lorenzo Maccone}, journal={Physical review letters}, year={2009}, volume={103 8}, pages={ 080401 } }

The arrow-of-time dilemma states that the laws of physics are invariant for time inversion, whereas the familiar phenomena we see everyday are not (i.e., entropy increases). I show that, within a quantum mechanical framework, all phenomena which leave a trail of information behind (and hence can be studied by physics) are those where entropy necessarily increases or remains constant. All phenomena where the entropy decreases must not leave any information of their having happened. This…

## Figures from this paper

## 91 Citations

The Thermodynamic Arrow-of-time and Quantum Mechanics

- PhysicsElectron. Notes Theor. Comput. Sci.
- 2011

Arrow of time and its reversal on the IBM quantum computer

- PhysicsScientific Reports
- 2019

It is shown that, while in nature the complex conjugation needed for time reversal may appear exponentially improbable, one can design a quantum algorithm that includes complex conjjugation and thus reverses a given quantum state.

The Universal Arrow of Time II: Quantum mechanics case

- Physics
- 2011

This paper is a natural continuation of our previous paper arXiv:1011.4173 . We illustrated earlier that in classical Hamilton mechanics, for overwhelming majority of real chaotic macroscopic…

1 Comment on “ Quantum Solution to the Arrow-of Time Dilemma ” of

- Physics
- 2013

A recent letter by Maccone presents a solution based on the existing laws of quantum mechanics to the arrow-of-time dilemma. He argues that all phenomena in which the entropy decreases must not leave…

Reversing the thermodynamic arrow of time using quantum correlations

- Physics
- 2017

The second law permits the prediction of the direction of natural processes, thus defining a thermodynamic arrow of time. However, standard thermodynamics presupposes the absence of initial…

Some Trends in Quantum Thermodynamics

- PhysicsEntropy
- 2014

A non-traditional approach to capturing such a propagation would be one which complements the postulates of QM by the 2nd Law of thermodynamics, resulting in a possibly meaningful, nonlinear dynamics.

Time-Reversal Symmetry and Arrow of Time in Quantum Mechanics of Open Systems

- PhysicsEntropy
- 2019

The breaking of the time-reversal symmetry in open quantum systems and the emergence of an arrow of time is considered and it is shown that the seemingly Hermitian Hamiltonian is non-Hermitian in the functional space of the resonant and anti-resonant states, and hence there is no contradiction in the fact that it has complex eigenvalues.

The Universal Arrow of Time is a Key for the Solution of the Basic Physical Paradoxes

- Physics
- 2013

The modern classical statistical physics, thermodynamics, quantum mechanics and gravity theory are developed and well-known theories. The described theories are developed and well studied for a long…

## References

SHOWING 1-10 OF 55 REFERENCES

BOOK REVIEW: The Physical Basis of the Direction of Time

- Physics
- 1989

The physical asymmetry of nature under time reversal is analysed in this essay. The author investigates the most important classes of phenomena that characterize a direction of time: radiation,…

Quantum Theory: Concepts and Methods

- Physics
- 1993

Preface. Part I: Gathering the Tools. 1. Introduction to Quantum Physics. 2. Quantum Tests. 3. Complex Vector Space. 4. Continuous Variables. Part II: Cryptodeterminism and Quantum Inseparability. 5.…

Quantum theory and measurement

- Physics
- 1983

The forty-nine papers collected here illuminate the meaning of quantum theory as it is disclosed in the measurement process. Together with an introduction and a supplemental annotated bibliography,…

Quantum mechanics and experience

- Physics
- 1992

Superposition the mathematical formalism and the standard way of thinking about it nonlocality the measurement problem the collapse of the wave function the dynamics by itself Bohm's theory…

Maxwell's Demon, Entropy, Information, Computing

- Physics
- 1990

This book brings under one cover twenty-five reprints, including seminal works by Maxwell and William Thomson; historical reviews by Martin Klein, Edward Daub, and Peter Heimann; information theoretic contributions by Leo Szilard, Leon Brillouin, Dennis Gabor, and Jerome Rothstein; and innovations by Rolf Landauer and Charles Bennett illustrating linkages with the limits of computation.

Fundamentals of Statistical and Thermal Physics

- Education
- 1965

This book is designed for the junior-senior thermodynamics course given in all departments as a standard part of the curriculum. The book is devoted to a discussion of some of the basic physical…

Time''s arrow and quantum measurement

- Physics
- 1978

A variable gain electronic current transformer for detecting the current flow into a power consuming system. An operational amplifier amplifies the detected current and the output of the operational…

Verh

- Deut. Phys. Gesell. 16, 820
- 1914

Phys

- Rev. Lett. 70, 363
- 1993