scholarly journals Relational Event-Time in Quantum Mechanics

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Sebastian Fortin ◽  
Olimpia Lombardi ◽  
Matías Pasqualini
Keyword(s):  
Quantum Mechanics ◽  
Event Time ◽  
Time In Quantum Mechanics

scholarly journals Emergence of Time in Quantum Gravity: Is Time Necessarily Flowing?

KronoScope ◽  
2013 ◽  
Vol 13 (1) ◽  
pp. 67-84 ◽  
Author(s):  
Pierre Martinetti
Keyword(s):  
Quantum Mechanics ◽  
Quantum Gravity ◽  
Proper Time ◽  
Dimensional Space ◽  
Thermal Time ◽  
List Type ◽  
State Dependent ◽  
Dimensional Space Time ◽  
Flow Of Time ◽  
Time In Quantum Mechanics

Abstract We discuss the emergence of time in quantum gravity and ask whether time is always “something that flows.” We first recall that this is indeed the case in both relativity and quantum mechanics, although in very different manners: time flows geometrically in relativity (i.e., as a flow of proper time in the four dimensional space-time), time flows abstractly in quantum mechanics (i.e., as a flow in the space of observables of the system). We then ask the same question in quantum gravity in the light of the thermal time hypothesis of Connes and Rovelli. The latter proposes to answer the question of time in quantum gravity (or at least one of its many aspects) by postulating that time is a state-dependent notion. This means that one is able to make a notion of time as an abstract flow—that we call the thermal time—emerge from the knowledge of both: the algebra of observables of the physical system under investigation; a state of thermal equilibrium of this system. Formally, the thermal time is similar to the abstract flow of time in quantum mechanics, but we show in various examples that it may have a concrete implementation either as a geometrical flow or as a geometrical flow combined with a non-geometric action. This indicates that in quantum gravity, time may well still be “something that flows” at some abstract algebraic level, but this does not necessarily imply that time is always and only “something that flows” at the geometric level.

Time-Reversal, Irreversibility and Arrow of Time in Quantum Mechanics

2006 ◽  
Vol 36 (3) ◽  
pp. 407-426 ◽  
Author(s):  
M. Castagnino ◽  
M. Gadella ◽  
O. Lombardi
Keyword(s):  
Quantum Mechanics ◽  
Time Reversal ◽  
Arrow Of Time ◽  
Time In Quantum Mechanics

Time in quantum mechanics

2002 ◽  
Vol 70 (3) ◽  
pp. 301-306 ◽  
Author(s):  
Jan Hilgevoord
Keyword(s):  
Quantum Mechanics ◽  
Time In Quantum Mechanics

The preparation-registration arrow of time in quantum mechanics

1994 ◽  
Vol 189 (6) ◽  
pp. 442-448 ◽  
Author(s):  
A. Bohm ◽  
I. Antoniou ◽  
P. Kielanowski
Keyword(s):  
Quantum Mechanics ◽  
Arrow Of Time ◽  
Time In Quantum Mechanics

QUANTUM MECHANICS AND THE ROLE OF TIME: ARE QUANTUM SYSTEMS MARKOVIAN?

2012 ◽  
Vol 26 (27n28) ◽  
pp. 1243005 ◽  
Author(s):  
THOMAS DURT
Keyword(s):  
Quantum Mechanics ◽  
Quantum Systems ◽  
Quantum Nonlocality ◽  
Border Line ◽  
The Past ◽  
Open Questions ◽  
The Status ◽  
Alternative Theories ◽  
Time In Quantum Mechanics

The predictions of the Quantum Theory have been verified so far with astonishingly high accuracy. Despite of its impressive successes, the theory still presents mysterious features such as the border line between the classical and quantum world, or the deep nature of quantum nonlocality. These open questions motivated in the past several proposals of alternative and/or generalized approaches. We shall discuss in the present paper alternative theories that can be infered from a reconsideration of the status of time in quantum mechanics. Roughly speaking, quantum mechanics is usually formulated as a memory free (Markovian) theory at a fundamental level, but alternative, nonMarkovian, formulations are possible, and some of them can be tested in the laboratory. In our paper we shall give a survey of these alternative proposals, describe related experiments that were realized in the past and also formulate new experimental proposals.

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