نتایج جستجو برای: quantum noise
تعداد نتایج: 481245 فیلتر نتایج به سال:
As quantum computers approach the fault-tolerance threshold, diagnosing and characterizing noise on large-scale devices is increasingly important. One of most important classes channels class Pauli channels, for reasons both theoretical tractability experimental relevance. Here we present a practical algorithm estimating s nonzero error rates in an s-sparse, n-qubit channel, or more generally l...
Squeezing of light’s quantum noise requires temporal rearranging of photons. This again corresponds to creation of quantum correlations between individual photons. Squeezed light is a non-classical manifestation of light with great potential in high-precision quantum measurements, for example in the detection of gravitational waves [1]. Equally promising applications have been proposed in quant...
A major goal of developing high-precision control of many-body quantum systems is to realize their potential as quantum computers. A substantial obstacle to this is the extreme fragility of quantum systems to "decoherence" from environmental noise and other control limitations. Although quantum computation is possible if the noise affecting the quantum system satisfies certain conditions, exist...
The quantum-mechanical description of coherent light, as produced by lasers, gives rise to an intrinsic noise, known as quantum noise, optical noise or shot noise. Several protocols have been proposed to exploit this physical phenomenon to obtain secure data encryption and key distribution. Here we focus on the cryptographic aspects of Barbosa’s protocol[1] and propose an improvement, which is ...
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