25 citations · 146 across the 29 of their papers we have counts for
28 papers · 1 filter
Training quantum machine learning models on cloud without uploading the data
Guang Ping He
Based on the linearity of quantum unitary operations, we propose a method that runs the parameterized quantum circuits before encoding the input data. This enables a dataset owner…
Comment on "Masking quantum information is impossible"
Guang Ping He
The no-masking theorem (Phys. Rev. Lett. 120, 230501 (2018)) claims that arbitrary quantum states cannot be masked. Based on this result, the authors further suggested that qubit c…
Computing the gradients with respect to all parameters of a quantum neural network using a single circuit
Guang Ping He
Finding gradients is a crucial step in training machine learning models. For quantum neural networks, computing gradients using the parameter-shift rule requires calculating the co…
A no-go result on observing quantum superpositions
Guang Ping He
We give a general proof showing that once irreversible processes are involved, a class of projective measurements is impossible. Applying this no-go result to the Schroedinger's ca…
Measurement-device-independent quantum key distribution with classical Bob and no joint measurement
Guang Ping He
Measurement-device-independent quantum key distribution (MDI-QKD) provides a method for secret communication whose security does not rely on trusted measurement devices. In all exi…
Realizing the "fictitious" beam splitter -- A stationary implementation of semi-counterfactual interaction-free imaging
Guang Ping He
Based on quantum counterfactual interaction-free measurement, we propose an implementation scheme for a beam splitter with anomalous reflection and transmission properties that loo…
An optical implementation of quantum bit commitment using infinite-dimensional systems
Guang Ping He
Unconditionally secure quantum bit commitment (QBC) was widely believed to be impossible for more than two decades. But recently, based on an anomalous behavior found in quantum st…
Cryptanalysis and improvement of Wu-Cai-Wu-Zhang's quantum private comparison protocol
Guang Ping He
In a recent paper (Int. J. Quantum Inf. 17 (2019) 1950026), the authors discussed the shortcomings in the security of a quantum private comparison protocol that we previously propo…
Device-independent quantum private comparison protocol without a third party
Guang Ping He
Since unconditionally secure quantum two-party computations are known to be impossible, most existing quantum private comparison (QPC) protocols adopted a third party. Recently, we…
Unconditionally secure quantum bit commitment based on the uncertainty principle
Guang Ping He
Unconditionally secure quantum bit commitment (QBC) was considered impossible. But the no-go proofs are based on the Hughston-Jozsa-Wootters (HJW) theorem (a.k.a. the Uhlmann theor…
Chaos in quantum steering in high-dimensional systems
Guang Ping He
Quantum steering means that in some bipartite quantum systems, the local measurements on one side can determine the state of the other side. Here we show that in high-dimensional s…
Quantum private comparison protocol without a third party
Guang Ping He
To evade the well-known impossibility of unconditionally secure quantum two-party computations, previous quantum private comparison protocols have to adopt a third party. Here we s…
Unconditionally secure quantum coin flipping
Guang Ping He
Quantum coin flipping (QCF) is an essential primitive for quantum cryptography. Unconditionally secure strong QCF with an arbitrarily small bias was widely believed to be impossibl…
Insecurity of a relativistic quantum commitment scheme
Guang Ping He
We propose a cheating strategy to a relativistic quantum commitment scheme [Sci Rep 2014;4:6774] which was claimed to be unconditionally secure. It is shown that the sender Alice c…
Security bound of cheat sensitive quantum bit commitment
Guang Ping He
Cheat sensitive quantum bit commitment (CSQBC) loosens the security requirement of quantum bit commitment (QBC), so that the existing impossibility proofs of unconditionally secure…
Secure quantum weak oblivious transfer against individual measurements
Guang Ping He
In quantum weak oblivious transfer, Alice sends Bob two bits and Bob can learn one of the bits at his choice. It was found that the security of such a protocol is bounded by $2P_{A…
Security limitation on a class of device-independent quantum key distribution
Guang Ping He
Recently there were many proposals on device-independent (DI) quantum key distribution protocol whose security is based on the violation of the Clauser-Horne-Shimony-Holt inequalit…
Secure quantum bit commitment against empty promises. II. The density matrix
Guang Ping He
We further study the security of the quantum bit commitment (QBC) protocol we previously proposed [Phys. Rev. A 74, 022332 (2006).], by analyzing the reduced density matrix ρ_{b}^{…
Comment on "A short impossibility proof of quantum bit commitment"
Guang Ping He
In a recent letter (Phys. Lett. A 377 (2013) 1076, arXiv:0905.3801), the authors presented an impossibility proof of quantum bit commitment, which attempted to cover all possible p…
Simplified quantum bit commitment using single photon nonlocality
Guang Ping He
We simplified our previously proposed quantum bit commitment (QBC) protocol based on the Mach-Zehnder interferometer, by replacing symmetric beam splitters with asymmetric ones. It…
Can relativistic bit commitment lead to secure quantum oblivious transfer?
Guang Ping He
While unconditionally secure bit commitment (BC) is considered impossible within the quantum framework, it can be obtained under relativistic or experimental constraints. Here we s…
Quantum protocols for the millionaire problem with a third party are trivial
Guang Ping He
Recently there were many quantum protocols devoted to solve the millionaire problem and private comparison problem by adding a semi-honest third party. They all require complicated…
Quantum key distribution based on orthogonal states allows secure quantum bit commitment
Guang Ping He
For more than a decade, it was believed that unconditionally secure quantum bit commitment (QBC) is impossible. But basing on a previously proposed quantum key distribution scheme…
An experimentally testable proof of the discreteness of time
Guang Ping He
By proposing a paradox between the impossibility of superluminal signal transfer and the normalization condition of wavefunctions, we predict that when a change happens to the cond…