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        <title><![CDATA[The note of quantum]]></title>
        <description><![CDATA[Record the note when I read the papers about quantum]]></description>
        <link>http://home.ustc.edu.cn/~gongsiqiu/_book/</link>
        <generator>RSS for Node</generator>
        <lastBuildDate>Mon, 25 Mar 2019 08:29:53 GMT</lastBuildDate>
        <atom:link href="http://home.ustc.edu.cn/~gongsiqiu/_book/rss" rel="self" type="application/rss+xml"/>
        <author><![CDATA[Gong Siqiu (龚思秋)]]></author>
        <managingEditor><![CDATA[gongsiqiu@mail.ustc.edu.cn]]></managingEditor>
        <webMaster><![CDATA[gongsiqiu@mail.ustc.edu.cn]]></webMaster>
        <category><![CDATA[quantum]]></category>
        <item>
            <title><![CDATA[Introduction]]></title>
            <description><![CDATA[This website is a notebook. I write it to sort out the papers I have read.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Basic Knowledge]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/README.html</link>
            <guid isPermaLink="true">http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/README.html</guid>
            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Basic knowledge]]></title>
            <description><![CDATA[{% pdf src="../asserts/note.pdf", width="120%", height="850" %}{% endpdf %}]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/basic.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Experimental Realization of Wheeler's Delayed-Choice Gedanken Experiment{{"Jacques2007"|cite}}]]></title>
            <description><![CDATA[We report the
realization of such a delayed-choice experiment
in a scheme close to the ideal original proposal.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/Experimental Realization of Wheeler&apos;s Delayed-Choice Gedanken Experiment.html</link>
            <guid isPermaLink="true">http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/Experimental Realization of Wheeler&apos;s Delayed-Choice Gedanken Experiment.html</guid>
            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Measurement of Subpicosecond Time Intervals between Two Photons by Interference {{"Hong1987"|cite}}]]></title>
            <description><![CDATA[This experiment is widely used to ensure the indistinguishability of two bosonic particles in the experiment.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/Measurement of Subpicosecond Time Intervals between Two Photons by Interference.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Probing Quantum Commutation Rules by Addition and Subtraction of Single Photons to/from a Light Field {{"Parigi2007"|cite}}]]></title>
            <description><![CDATA[As the final states depend on the order in which the two actions are performed, we directly
observed the noncommutativity of the creation and annihilation operators]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/Probing Quantum Commutation Rules by Addition and Subtraction of Single Photons to or from a Light Field.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Ruling Out Multi-Order Interference in Quantum Mechanics{{"Sinha2010"|cite}}]]></title>
            <description><![CDATA[This article ruled out third- and higher-order interference and providing a bound on the accuracy of Born's rule.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/1-Basic knowledge/Ruling Out Multi-Order Interference in Quantum Mechanics.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Single-photon sources]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/README.html</link>
            <guid isPermaLink="true">http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/README.html</guid>
            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[High-efficiency single-photon generation via large-scale active time multiplexing {{"Kaneda2018"|cite}}]]></title>
            <description><![CDATA[On-demand generation of indistinguishable single- and multi-photon states
is a key technology for scaling up optical quantum information and commu-
nication applications. Nonlinear parametric photon-pair sources and heralded
single-photon sources (HSPSs) had been the most standard resource of quantum
information applications for decades. However, the intrinsic uncertainty of
the produced number of photon pairs in such sources is a critical drawback that
prevents on-demand photon-pair and heralded single-photon generation. Here
we demonstrate large-scale time multiplexing of indistinguishable heralded sin-
gle photons, employing a low-loss HSPS and adjustable delay line. We observed
66.7±2.4% presence probability of single-photon states collected into a singlemode optical fiber by multiplexing 40 periodic time bins of heralded single pho-
tons. To our knowledge, this is the highest fiber-coupled single-photon probabil-
ity achieved to date. A high indistinguishability (∼90%) of our time-multiplexed
photons has also been confirmed. We also experimentally investigate trade-off
relations of single-photon probability and unwanted multiphoton contribution
by using different pump powers for a HSPS. Our results demonstrate that low-loss, large-scale multiplexing can realize highly efficient single-photon generation
as well as highly scalable multi-photon generation from inefficient HSPSs. We
predict that our large-scale time multiplexing will pave the way toward genera-
tion of > 30 coincident photons with unprecedented efficiencies, enabling a new
frontier in optical quantum information processing.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/High-efficiency single-photon generation via large-scale active time multiplexing.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[New High-Intensity Source of Polarization-Entangled Photon Pairs{{"Kwiat1995"|cite}}]]></title>
            <description><![CDATA[We report on a high-intensity source of polarization-entangled photon pairs with high momentum
definition.Type-ll noncollinear phase matching in parametric down conversion produces true
entanglement: No part of the wave function must be discarded, in contrast to previous schemes.
With two-photon fringe visibilities in excess of 97%, we demonstrated a violation of Bell’s inequality
by over 100 standard deviations in less than 5 min. The new source allowed ready preparation of all
four of the EPR-Bell states.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/New High-Intensity Source of Polarization-Entangled Photon Pairs.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Push-button photon entanglement{{"Lu2014"|cite}}]]></title>
            <description><![CDATA[The ideal source will have the following
four characteristics. (i) Deterministic
generation — on a pulsed excitation, the
source should emit one, and only one, pair
of entangled photons with a vanishingly
small chance of multi-pair emission. (ii)
High fidelity — the created two-photon state
should closely resemble the ideal desired
entangled state. (iii) Indistinguishability —
individual photons emitted in different trials
should be quantum mechanically identical to
each other. (iv) High collection efficiency —
radiated photons should be extracted with a
high efficiency so that they are not lost.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/Push-button photon entanglement.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source{{"Migdall2002"|cite}}]]></title>
            <description><![CDATA[We describe
a multiplexed system that allows the probabilities of producing one and more photons to be adjusted
independently, enabling a much better approximation of a source of single photons on demand.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/2-Single-photon sources/Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Boson sampling]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/3-Boson sampling/README.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Interference of identical particles from entanglement to boson-sampling{{"Tichy2014"|cite}}]]></title>
            <description><![CDATA[This tutorial introduces the physics of many-boson and many-fermion interference required for the description of current experiments and for the understanding of novel approaches to quantum computing.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/3-Boson sampling/Interference of identical particles from entanglement to boson-sampling.html</link>
            <guid isPermaLink="true">http://home.ustc.edu.cn/~gongsiqiu/_book/3-Boson sampling/Interference of identical particles from entanglement to boson-sampling.html</guid>
            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Multi-photon entanglement and interferometry {{"Pan2012"|cite}}]]></title>
            <description><![CDATA[Multi-photon interference reveals strictly non-classical phenomena. Its applications range from
fundamental tests of quantum mechanics to photonic quantum information processing, where a
significant fraction of key experiments achieved so far comes from multi-photon state manipulation. We review the progress, both theoretical and experimental, of this rapidly advancing
research. The emphasis is given to the creation of photonic entanglement of various forms, tests
of the completeness of quantum mechanics (in particular, violations of local realism), quantum
information protocols for quantum communication (e.g., quantum teleportation, entanglement purification and quantum repeater), and quantum computation with linear optics. We shall limit the
scope of our review to “few photon” phenomena involving measurements of discrete observables.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/3-Boson sampling/Multi-photon entanglement and interferometry.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Time-Bin-Encoded Boson Sampling {{"He2017"|cite}}]]></title>
            <description><![CDATA[An intrinsic problem in the SPDC, however,is that the photon pairs are generated probabilistically,
and mixed with double pair emission. To scale up to a larger number of photons and fast sampling rate, a more efficient route is to use single-photon sources that emit one and only one photon each time. Here is quantum dot(QD) micropillar.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/3-Boson sampling/Time-Bin-Encoded Boson Sampling with a Single-Photon Device.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Quantum manipulation]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/README.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric downconversion{{"Zhong2018a"|cite}}]]></title>
            <description><![CDATA[In the view of quantum engineering,
the single photons should be efficiently prepared in a pure state with a single degree of
freedom. However, usually the uncontrolled entanglement in the frequency and/or time
can significantly degrade the entanglement in the polarization.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric down-conversion.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Experimental Entanglement Swapping: Entangling Photons That Never Interacted{{"Pan1998"|cite}}]]></title>
            <description><![CDATA[We experimentally entangle freely propagating particles that never physically interacted with one
another or which have never been dynamically coupled by any other means. This demonstrates that
quantum entanglement requires the entangled particles neither to come from a common source nor to
have interacted in the past. In our experiment we take two pairs of polarization entangled photons and
subject one photon from each pair to a Bell-state measurement. This results in projecting the other two
outgoing photons into an entangled state.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/Experimental Entanglement Swapping: Entangling Photons That Never Interacted.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Experimental quantum teleportation {{"Bouwmeester1997"|cite}}]]></title>
            <description><![CDATA[Quantum teleportation—the transmission and reconstruction over arbitrary distances of the state of a quantum
system—is demonstrated experimentally. During teleportation, an initial photon which carries the polarization that is to
be transferred and one of a pair of entangled photons are subjected to a measurement such that the second photon of
the entangled pair acquires the polarization of the initial photon. This latter photon can be arbitrarily far away from the
initial one. Quantum teleportation will be a critical ingredient for quantum computation networks.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/Experimental quantum teleportation.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Observation of Three-Photon Greenberger-Horne-Zeilinger Entanglement {{"Bouwmeester1999"|cite}}]]></title>
            <description><![CDATA[We present the experimental observation of polarization entanglement for three spatially separated
photons. Such states of more than two entangled particles, known as Greenberger-Horne-Zeilinger
(GHZ) states, play a crucial role in fundamental tests of quantum mechanics versus local realism and
in many quantum information and quantum computation schemes. Our experimental arrangement is
such that we start with two pairs of entangled photons and register the photons in a way that any
information as to which pair each photon belongs to is erased. After detecting a trigger photon, the
registered events at the detectors for the remaining three photons exhibit the desired GHZ correlations.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/Observation of Three-Photon Greenberger-Horne-Zeilinger Entanglement.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Quantum copying: Beyond the no-cloning theorem{{"Bu_ek_1996"|cite}}]]></title>
            <description><![CDATA[We analyze the possibility of copying (that is, cloning) arbitrary states of a quantum-mechanical spin-1/2
system.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/Quantum copying: Beyond the no-cloning theorem.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels {{"Bennett1993"|cite}}]]></title>
            <description><![CDATA[An unknown quantum state $$|\phi \rangle$$ can be disassembled into, then later reconstructed from, purely
classical information and purely nonclassical Einstein-Podolsky-Rosen (EPR) correlations. To do
so the sender, “Alice,” and the receiver, “Bob,” must prearrange the sharing of an EPR—correlated
pair of particles. Alice makes a joint measurement on her EPR particle and the unknown quantum
system, and sends Bob the Classical result of this measurement. Knowing this, Bob can convert the
state of his EPR particle into an exact replica of the unknown state $$|\phi \rangle$$ which Alice destroyed.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/4-Quantum manipulation/Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Algorithm]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/5-Algorithm/README.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Photonic Recurrent Ising Sampler]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/5-Algorithm/Photonic Recurrent Ising Sampler.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Quantum communication]]></title>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/6-Quantum communication/README.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Communication via one- and two-particle operators on Einstein-Podolsky-Rosen states{{"Bennett1992a"|cite}}]]></title>
            <description><![CDATA[As is well known, operations on one particle of an Einstein-Podolsky-Rosen (EPR) pair cannot
influence the marginal statistics of measurements on the other particle. We characterize the set of states
accessible from an initial EPR state by one-particle operations and show that in a sense they allow two
bits to be encoded reliably in one spin$$-\frac{1}{2}$$ particle: One party, “Alice,” prepares an EPR pair and sends
one of the particles to another party, “Bob,” who applies one of four unitary operators to the particle,
and then returns it to Alice. By measuring the two particles jointly, Alice can now reliably learn which
operator Bob used.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/6-Quantum communication/Communication via one- and two-particle operators on Einstein-Podolsky-Rosen states.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Quantum Cryptography Using Any Two Nonorthogonal States{{"Bennett1992"|cite}}]]></title>
            <description><![CDATA[Here we show that in principle any two nonorthogonal quantum states
suffice, and describe a practical interferometric realization using low-intensity coherent light pulses.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/6-Quantum communication/Quantum Cryptography Using Any Two Nonorthogonal States.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Quantum secret sharing {{"Hillery1999"|cite}}]]></title>
            <description><![CDATA[Secret sharing is a procedure for splitting a message into several parts so that no subset of parts is sufficient
to read the message, but the entire set is. We show how this procedure can be implemented using Greenberger-
Horne-Zeilinger (GHZ) states. In the quantum case the presence of an eavesdropper will introduce errors so
that his presence can be detected. We also show how GHZ states can be used to split quantum information into
two parts so that both parts are necessary to reconstruct the original qubit.]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/6-Quantum communication/Quantum secret sharing.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
        </item>
        <item>
            <title><![CDATA[Reference]]></title>
            <description><![CDATA[{% references %}]]></description>
            <link>http://home.ustc.edu.cn/~gongsiqiu/_book/References.html</link>
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            <dc:creator><![CDATA[Gong Siqiu (龚思秋)]]></dc:creator>
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