noun
COLLOCATIONS FROM OTHER ENTRIES
quantum computer
quantum leap
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There has been a quantum leap in the range of the wines sold in the UK.
quantum mechanics
quantum theory
quantum/great/huge etc leap
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a quantum leap very great increase or change in population levels
taken a quantum leap
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The treatment of breast cancer has taken a quantum leap forward.
COLLOCATIONS FROM CORPUS
■ NOUN
field
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Research in theory and computation encompasses quantum field theories of elementary particles, neural networks and quantum chromodynamics.
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Finally there is quantum electrodynamics, which is the quantum field theory of light and charged particles.
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The answer to this question takes the discussion deep into the realm of quantum field theory.
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There have to be quantum fields with very definite properties of energy, mass and so on.
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Capra's parallels are between not hypotheses but concepts, for example the ch'i and the quantum field .
gravity
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This, however, is difficult to determine in the case of quantum gravity , for two reasons.
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In October 1981, I went to Moscow for a conference on quantum gravity .
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We do not yet know the exact form the correct theory of quantum gravity will take.
leap
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By placing Franco in overall command, the Nationalists made a quantum leap forward in their efforts to secure victory.
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Agricultural technologies have revolutionized farm production, resulting in quantum leaps in output.
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The quantum leap expressed itself partly in population levels.
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The market is forcing the players to move on in quantum leaps in order to keep their market share.
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I think that there are two aspects to the question of a quantum leap in nuclear weapons.
level
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It is not the case that absolutely anything can happen at any moment, at the quantum level .
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What Heisenberg claims is that not every event, at the quantum level , is sufficiently caused.
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How does this affect things when effects at the quantum level get magnified so as to reach the classical level?
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We shall only use these strange complex-number combinations at the quantum level .
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The quantum level is the level of molecules, atoms, subatomic particles, etc.
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We shall be seeing that the complex numbers that we must use at the quantum level are closely related to classical probabilities.
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But at the quantum level these terms give important interference effects.
mechanics
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In telling you how it works we will have told you about the basic peculiarities of all quantum mechanics .
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We have learnt that, according to quantum mechanics , even a single particle must behave like a wave all by itself.
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One might expect the fluctuations that are implied by quantum mechanics to give a cosmological constant that is very large.
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To understand quantum mechanics , we must come to terms with complex-number weightings.
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In such strong fields the effects of quantum mechanics should be important.
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Quantum cryptography exploits a key principle of quantum mechanics , according to which certain aspects of any subatomic process are inherently unknowable.
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We no more understand how biology emerges from physics than we understand how classical measuring apparatus emerges from quantum mechanics .
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Physicists like the mathematical beauty of string theory because it banishes the absurdities that pop up when quantum mechanics and gravity combine.
number
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The quantum numbers represent energy levels.
physics
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Microchips aid quantum physics Technology from the semiconductor industry has allowed an experiment in fundamental physics previously possible only in theory.
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Such people often see their lives more effectively framed by the reality metaphors that modern quantum physics and chaos theory provide.
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Tried to explain the real implications of quantum physics as we crossed Kensington Road.
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This is because, in the wacky world of quantum physics , light is wavy as well as particulate.
state
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Instead, they had a quantum state , which was a combination of position and velocity.
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Thus these symbols now denote quantum states .
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This picture is that presented by a quantum state .
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This collection of complex weightings describes the quantum state of the particle.
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We shall also be examining, in some detail, how quantum states are actually described.
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Products' can also be taken between any other pair of quantum states , not necessarily single-particle states.
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However, it is possible to copy a quantum state if we are prepared to destroy the state of the original.
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A single point of Hilbert space now represents the quantum state of an entire system.
system
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We are back again to the idea that quantum systems exhibit an unexpected degree of togetherness.
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Instead, each Hilbert space dimension corresponds to one of the different independent physical states of a quantum system .
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For quantum systems it seems that once they have met there is never true parting.
theory
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A divorce is decreed between wave and particle which quantum theory had for ever joined together.
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Might not some essential aspects of quantum theory also be playing crucial roles in the physics that underlies our thought processes?
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In the quantum theory of gravity, on the other hand, a third possibility arises.
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According to quantum theory , elementary particles do not really exist until an intelligent observer measures them.
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This tale of parallel realities claims to be based on quantum theory , and is dressed up with suitable jargon.
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Using quantum theory to understand gravity makes as much sense as trying solve a crossword puzzle with the key to your door.
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It also has the great advantage that many of the infinities that arise in quantum theory cancel each other out.
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And yet, the most sophisticated experiments have proved quantum theory correct time after time.
world
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Measurement involves an intervention by our everyday world into the quantum world.
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But hold on to your hat-there is more strangeness yet in the quantum world !
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The microscopic quantum world is imprecise; it is the domain of Heisenberg uncertainty.
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This is so that we can attain some genuine understanding of the quantum world .
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In particular, how does it come about that the imprecise quantum world yields a precise answer when it is experimentally interrogated?
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If you thought that science was invariably characterised by clarity of vision you may have found the quantum world unexpectedly murky.
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We have to give that up in the quantum world .
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Perplexities A layman venturing into the quantum world no doubt expects to encounter some fairly strange phenomena.
■ VERB
understand
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It doesn't really matter if you don't understand relativity and quantum mechanics, or even if these theories are incorrect.
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As we now know, quantum theory is needed in order that the actual structure of solids can be properly understood .
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Richard Feynman, said to be the greatest theoretical physicist of modern times, stated that no-one understands quantum mechanics.
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To understand quantum mechanics, we must come to terms with complex-number weightings.
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This is so that we can attain some genuine understanding of the quantum world.
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Yet, some day science may give us a more profound understanding of Nature than quantum theory can provide.
EXAMPLES FROM CORPUS
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Actually, quantum descriptions are very precise, as we shall see, although radically different from the familiar classical ones.
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Because string theory has so much symmetry, it can accommodate the disparate faces of nature displayed by gravity and quantum theory.
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But at the quantum level these terms give important interference effects.
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Contemporary cosmology even suggests that the whole universe might have appeared out of the quantum vacuum: the ultimate free lunch.
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Finally there is quantum electrodynamics, which is the quantum field theory of light and charged particles.
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In the quantum theory of gravity, on the other hand, a third possibility arises.
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Of course, there is nothing intrinsically quantum mechanical in what has been said so far.
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The first derives from the quantum theory.